{"id":1517,"date":"2025-03-24T08:50:31","date_gmt":"2025-03-23T23:50:31","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1517"},"modified":"2025-03-24T08:50:31","modified_gmt":"2025-03-23T23:50:31","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91ruby-%e3%82%b9%e3%83%a9%e3%82%a4%e3%82%b9%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e5%ae%8c%e5%85%a8%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%ef%bc%81%e5%ae%9f","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1517","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Ruby \u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30de\u30b9\u30bf\u30fc\uff01\u5b9f\u8df5\u7684\u306a7\u3064\u306e\u4f7f\u3044\u65b9\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">Ruby \u306e\u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f \u57fa\u790e\u304b\u3089\u5b8c\u5168\u306b\u7406\u89e3\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u914d\u5217\u3068\u6587\u5b57\u5217\u3067\u4f7f\u3048\u308b\u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-4\">\u5f93\u6765\u306e\u90e8\u5206\u62bd\u51fa\u65b9\u6cd5\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\u914d\u5217\u306b\u5bfe\u3059\u308bslice\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u305f\u8981\u7d20\u306e\u53d6\u5f97\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u7bc4\u56f2\u6307\u5b9a\u306b\u3088\u308b\u8907\u6570\u8981\u7d20\u306e\u62bd\u51fa\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u8ca0\u306e\u6570\u3092\u4f7f\u7528\u3057\u305f\u672b\u5c3e\u304b\u3089\u306e\u8981\u7d20\u53d6\u5f97<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">\u6587\u5b57\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308bslice\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">\u6587\u5b57\u5217\u304b\u3089\u90e8\u5206\u6587\u5b57\u5217\u3092\u62bd\u51fa\u3059\u308b\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u6b63\u898f\u8868\u73fe\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u51e6\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-20\">slice\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u6642\u306e\u6700\u9069\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6700\u9069\u5316\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-28\">\u3088\u304f\u3042\u308b\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-29\">nil\u767a\u751f\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u5bfe\u7b56<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-32\">\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9slice!\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-36\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u96c6<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-37\">CSV\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-38\">API\u5fdc\u7b54\u51e6\u7406\u3067\u306e\u5fdc\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-39\">\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u51e6\u7406\u3067\u306e\u5fdc\u7528\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-40\">slice\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-41\">\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-44\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u30b3\u30fc\u30c9\u6539\u5584\u4f8b<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">Ruby \u306e\u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f \u57fa\u790e\u304b\u3089\u5b8c\u5168\u306b\u7406\u89e3\u3059\u308b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u914d\u5217\u3068\u6587\u5b57\u5217\u3067\u4f7f\u3048\u308b\u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c<\/h3>\n\n\n\n<p>Ruby\u306eslice\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u3084\u6587\u5b57\u5217\u304b\u3089\u7279\u5b9a\u306e\u8981\u7d20\u3084\u90e8\u5206\u3092\u62bd\u51fa\u3059\u308b\u305f\u3081\u306e\u975e\u5e38\u306b\u67d4\u8edf\u3067\u5f37\u529b\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u90e8\u3092\u52b9\u7387\u7684\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-2\">\u914d\u5217\u3067\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u5358\u4e00\u306e\u8981\u7d20\u3092\u53d6\u5f97\narray = [1, 2, 3, 4, 5]\narray.slice(2)      # =&gt; 3\narray[2]            # =&gt; 3 \uff08[]\u306f\u5185\u90e8\u7684\u306bslice\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\uff09\n\n# \u7bc4\u56f2\u6307\u5b9a\u3067\u8907\u6570\u8981\u7d20\u3092\u53d6\u5f97\narray.slice(1..3)   # =&gt; [2, 3, 4]\narray[1..3]         # =&gt; [2, 3, 4]\n\n# \u958b\u59cb\u4f4d\u7f6e\u3068\u9577\u3055\u3092\u6307\u5b9a\u3057\u3066\u53d6\u5f97\narray.slice(1, 2)   # =&gt; [2, 3]\narray[1, 2]         # =&gt; [2, 3]<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">\u6587\u5b57\u5217\u3067\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u6587\u5b57\u5217\u304b\u3089\u306e\u6587\u5b57\u62bd\u51fa\nstring = \"Hello, Ruby!\"\nstring.slice(0)     # =&gt; \"H\"\nstring[0]           # =&gt; \"H\"\n\n# \u7bc4\u56f2\u6307\u5b9a\u3067\u306e\u90e8\u5206\u6587\u5b57\u5217\u53d6\u5f97\nstring.slice(0..4)  # =&gt; \"Hello\"\nstring[0..4]        # =&gt; \"Hello\"\n\n# \u958b\u59cb\u4f4d\u7f6e\u3068\u9577\u3055\u3092\u6307\u5b9a\u3057\u305f\u90e8\u5206\u6587\u5b57\u5217\u53d6\u5f97\nstring.slice(7, 4)  # =&gt; \"Ruby\"\nstring[7, 4]        # =&gt; \"Ruby\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u5f93\u6765\u306e\u90e8\u5206\u62bd\u51fa\u65b9\u6cd5\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-5\">\u5f93\u6765\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/h4>\n\n\n<div id=\"id-54a27c1b-c911-4235-b7d7-931ef9ba9c09\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u7528\u9014<\/th><th>\u7279\u5fb4<\/th><\/tr><\/thead><tbody><tr><td>slice<\/td><td>\u67d4\u8edf\u306a\u90e8\u5206\u62bd\u51fa<\/td><td>\u30fb\u591a\u69d8\u306a\u5f15\u6570\u5f62\u5f0f\u3092\u30b5\u30dd\u30fc\u30c8<br>\u30fb\u76f4\u611f\u7684\u306a\u8a18\u8ff0\u304c\u53ef\u80fd<\/td><\/tr><tr><td>substring<\/td><td>\u6587\u5b57\u5217\u306e\u90e8\u5206\u62bd\u51fa<\/td><td>\u30fb\u6587\u5b57\u5217\u5c02\u7528<br>\u30fb\u6a5f\u80fd\u304c\u9650\u5b9a\u7684<\/td><\/tr><tr><td>take<\/td><td>\u5148\u982d\u304b\u3089\u306e\u8981\u7d20\u53d6\u5f97<\/td><td>\u30fb\u914d\u5217\u306e\u5148\u982d\u306e\u307f\u5bfe\u8c61<br>\u30fb\u8ca0\u306e\u5024\u304c\u4f7f\u3048\u306a\u3044<\/td><\/tr><tr><td>drop<\/td><td>\u6307\u5b9a\u6570\u306e\u8981\u7d20\u3092\u9664\u5916<\/td><td>\u30fb\u5148\u982d\u304b\u3089\u306e\u9664\u5916\u306e\u307f<br>\u30fb\u672b\u5c3e\u304b\u3089\u306e\u64cd\u4f5c\u4e0d\u53ef<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-6\">slice\u30e1\u30bd\u30c3\u30c9\u306e\u5229\u70b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u67d4\u8edf\u6027\u306e\u9ad8\u3055<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3001\u7bc4\u56f2\u3001\u9577\u3055\u6307\u5b9a\u306a\u3069\u591a\u69d8\u306a\u62bd\u51fa\u65b9\u6cd5<\/li>\n\n\n\n<li>\u8ca0\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u3088\u308b\u672b\u5c3e\u304b\u3089\u306e\u6307\u5b9a\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u914d\u5217\u3068\u6587\u5b57\u5217\u3067\u4e00\u8cab\u3057\u305f\u4f7f\u3044\u65b9<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   # \u5f93\u6765\u306e\u65b9\u6cd5\n   name = full_name.split(' ')[0]\n\n   # slice\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5\n   name = full_name.split(' ').slice(0)  # \u3088\u308a\u610f\u56f3\u304c\u660e\u78ba<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u7c21\u6f54\u3055<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   # \u7bc4\u56f2\u5916\u30a2\u30af\u30bb\u30b9\u6642\u306fnil\u3092\u8fd4\u3059\n   array = [1, 2, 3]\n   array.slice(5)     # =&gt; nil\n   array[5]           # =&gt; nil<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001slice\u30e1\u30bd\u30c3\u30c9\u306f\u5f93\u6765\u306e\u90e8\u5206\u62bd\u51fa\u30e1\u30bd\u30c3\u30c9\u3068\u6bd4\u3079\u3066\u3001\u3088\u308a\u67d4\u8edf\u3067\u76f4\u611f\u7684\u306a\u64cd\u4f5c\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u7279\u306b\u3001\u914d\u5217\u3068\u6587\u5b57\u5217\u306e\u4e21\u65b9\u3067\u540c\u3058\u3088\u3046\u306a\u69cb\u6587\u304c\u4f7f\u3048\u308b\u3053\u3068\u306f\u3001\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u4e0a\u3067\u5927\u304d\u306a\u5229\u70b9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">\u914d\u5217\u306b\u5bfe\u3059\u308bslice\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u305f\u8981\u7d20\u306e\u53d6\u5f97\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u914d\u5217\u304b\u3089\u306e\u8981\u7d20\u53d6\u5f97\u306b\u306f\u3001\u69d8\u3005\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u305f\u52b9\u679c\u7684\u306a\u53d6\u5f97\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">users = ['Alice', 'Bob', 'Charlie', 'David', 'Eve']\n\n# \u5358\u4e00\u8981\u7d20\u306e\u53d6\u5f97\nfirst_user = users.slice(0)    # =&gt; \"Alice\"\nthird_user = users.slice(2)    # =&gt; \"Charlie\"\n\n# \u8907\u6570\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u3066\u53d6\u5f97\nselected_users = users.values_at(0, 2, 4)    # =&gt; [\"Alice\", \"Charlie\", \"Eve\"]\n\n# \u6761\u4ef6\u306b\u57fa\u3065\u304f\u52d5\u7684\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6307\u5b9a\nadmin_index = users.index('Bob')\nadmin_user = users.slice(admin_index)    # =&gt; \"Bob\"<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-9\">\u5b9f\u8df5\u7684\u306a\u30a8\u30e9\u30fc\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def get_user(users, index)\n  users.slice(index) || \"User not found\"\nend\n\n# \u5b9f\u88c5\u4f8b\nusers = ['Alice', 'Bob']\nputs get_user(users, 1)    # =&gt; \"Bob\"\nputs get_user(users, 5)    # =&gt; \"User not found\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u7bc4\u56f2\u6307\u5b9a\u306b\u3088\u308b\u8907\u6570\u8981\u7d20\u306e\u62bd\u51fa\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u7bc4\u56f2\u6307\u5b9a\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u9023\u7d9a\u3057\u305f\u8981\u7d20\u3092\u52b9\u7387\u7684\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n\n# \u57fa\u672c\u7684\u306a\u7bc4\u56f2\u6307\u5b9a\nfirst_three = data.slice(0..2)    # =&gt; [1, 2, 3]\nmiddle_part = data.slice(3...6)   # =&gt; [4, 5, 6]\n\n# \u52d5\u7684\u306a\u7bc4\u56f2\u6307\u5b9a\nstart_index = 2\nlength = 4\nsubset = data.slice(start_index, length)    # =&gt; [3, 4, 5, 6]\n\n# \u7bc4\u56f2\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u6307\u5b9a\nrange = (2..5)\nselected_data = data.slice(range)    # =&gt; [3, 4, 5, 6]<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u7bc4\u56f2\u6307\u5b9a<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u5927\u898f\u6a21\u914d\u5217\u3067\u306e\u52b9\u7387\u7684\u306a\u7bc4\u56f2\u6307\u5b9a\nlarge_array = (1..1000).to_a\nchunk_size = 100\n\ndef process_in_chunks(array, chunk_size)\n  (0...array.size).step(chunk_size) do |i|\n    chunk = array.slice(i, chunk_size)\n    yield chunk\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nprocess_in_chunks(large_array, chunk_size) do |chunk|\n  # \u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u306e\u51e6\u7406\n  puts \"Processing #{chunk.size} items\"\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u8ca0\u306e\u6570\u3092\u4f7f\u7528\u3057\u305f\u672b\u5c3e\u304b\u3089\u306e\u8981\u7d20\u53d6\u5f97<\/h3>\n\n\n\n<p>\u8ca0\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u914d\u5217\u306e\u672b\u5c3e\u304b\u3089\u8981\u7d20\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">logs = ['log1', 'log2', 'log3', 'log4', 'log5']\n\n# \u672b\u5c3e\u306e\u8981\u7d20\u3092\u53d6\u5f97\nlast_log = logs.slice(-1)    # =&gt; \"log5\"\nsecond_last = logs.slice(-2)    # =&gt; \"log4\"\n\n# \u672b\u5c3e\u304b\u3089\u306e\u7bc4\u56f2\u6307\u5b9a\nrecent_logs = logs.slice(-3..-1)    # =&gt; [\"log3\", \"log4\", \"log5\"]\n\n# \u672b\u5c3e\u304b\u3089\u306en\u500b\u306e\u8981\u7d20\u3092\u53d6\u5f97\ndef get_recent_items(array, count)\n  array.slice(-count..-1) || []\nend\n\n# \u5b9f\u88c5\u4f8b\nrecent_three = get_recent_items(logs, 3)    # =&gt; [\"log3\", \"log4\", \"log5\"]<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class LogAnalyzer\n  def initialize(logs)\n    @logs = logs\n  end\n\n  def recent_errors(count)\n    error_logs = @logs.select { |log| log.include?('ERROR') }\n    error_logs.slice(-count..-1) || []\n  end\n\n  def last_hour_logs\n    current_time = Time.now\n    one_hour_ago = current_time - 3600\n\n    @logs.select do |log|\n      log_time = Time.parse(log)\n      log_time.between?(one_hour_ago, current_time)\n    end\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001slice\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u914d\u5217\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u67d4\u8edf\u304b\u3064\u52b9\u7387\u7684\u306a\u30a2\u30af\u30bb\u30b9\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u6271\u3046\u5834\u5408\u3084\u3001\u52d5\u7684\u306a\u8981\u7d20\u30a2\u30af\u30bb\u30b9\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u3001\u305d\u306e\u771f\u4fa1\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">\u6587\u5b57\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308bslice\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u6587\u5b57\u5217\u304b\u3089\u90e8\u5206\u6587\u5b57\u5217\u3092\u62bd\u51fa\u3059\u308b\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308bslice\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u69d8\u3005\u306a\u65b9\u6cd5\u3067\u90e8\u5206\u6587\u5b57\u5217\u3092\u62bd\u51fa\u3067\u304d\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u57fa\u672c\u7684\u306a\u90e8\u5206\u6587\u5b57\u5217\u306e\u62bd\u51fa\ntext = \"Hello, World!\"\n\n# \u5358\u4e00\u6587\u5b57\u306e\u53d6\u5f97\nfirst_char = text.slice(0)      # =&gt; \"H\"\nlast_char = text.slice(-1)      # =&gt; \"!\"\n\n# \u7bc4\u56f2\u6307\u5b9a\u306b\u3088\u308b\u62bd\u51fa\ngreeting = text.slice(0..4)     # =&gt; \"Hello\"\nword = text.slice(7..11)        # =&gt; \"World\"\n\n# \u4f4d\u7f6e\u3068\u9577\u3055\u3092\u6307\u5b9a\u3057\u305f\u62bd\u51fa\ncomma_part = text.slice(5, 2)   # =&gt; \", \"<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">\u5b9f\u8df5\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\u30d1\u30bf\u30fc\u30f3<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class StringProcessor\n  def initialize(text)\n    @text = text\n  end\n\n  def extract_first_word\n    space_index = @text.index(' ')\n    space_index ? @text.slice(0...space_index) : @text\n  end\n\n  def extract_last_word\n    last_space_index = @text.rindex(' ')\n    last_space_index ? @text.slice((last_space_index + 1)..-1) : @text\n  end\n\n  def extract_between_markers(start_marker, end_marker)\n    start_pos = @text.index(start_marker)\n    return nil unless start_pos\n\n    end_pos = @text.index(end_marker, start_pos + start_marker.length)\n    return nil unless end_pos\n\n    @text.slice((start_pos + start_marker.length)...end_pos)\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nprocessor = StringProcessor.new(\"Hello [user] World\")\nuser_name = processor.extract_between_markers('[', ']')  # =&gt; \"user\"<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u6b63\u898f\u8868\u73fe\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u51e6\u7406<\/h3>\n\n\n\n<p>slice\u30e1\u30bd\u30c3\u30c9\u306f\u6b63\u898f\u8868\u73fe\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">text = \"Contact us at: support@example.com or sales@example.com\"\n\n# \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u62bd\u51fa\nemail_pattern = \/\\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Z|a-z]{2,}\\b\/\n\n# \u6b63\u898f\u8868\u73fe\u306b\u30de\u30c3\u30c1\u3059\u308b\u6700\u521d\u306e\u90e8\u5206\u3092\u62bd\u51fa\nfirst_email = text.slice(email_pattern)  # =&gt; \"support@example.com\"\n\n# \u65e5\u4ed8\u5f62\u5f0f\u306e\u62bd\u51fa\ndate_text = \"Date: 2024-12-06\"\ndate_pattern = \/\\d{4}-\\d{2}-\\d{2}\/\ndate = date_text.slice(date_pattern)  # =&gt; \"2024-12-06\"\n\n# URL\u306e\u62bd\u51fa\u3068\u51e6\u7406\nurl_text = \"Visit our website at https:\/\/www.example.com\/path?param=value\"\nurl_pattern = %r{https?:\/\/[^\\s]+}\nurl = url_text.slice(url_pattern)  # =&gt; \"https:\/\/www.example.com\/path?param=value\"<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u51e6\u7406\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">module StringExtractor\n  def self.extract_urls(text)\n    urls = []\n    current_pos = 0\n    url_pattern = %r{https?:\/\/[^\\s]+}\n\n    while match = text.slice(url_pattern, current_pos)\n      urls &lt;&lt; match\n      current_pos = text.index(match, current_pos) + match.length\n    end\n    urls\n  end\n\n  def self.extract_between_tags(text, tag)\n    pattern = \/&lt;#{tag}&gt;(.*?)&lt;\\\/#{tag}&gt;\/\n    matches = []\n    current_pos = 0\n\n    while match = text.slice(pattern, current_pos)\n      matches &lt;&lt; match[1]\n      current_pos = text.index(match, current_pos) + match.length\n    end\n    matches\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u65e5\u672c\u8a9e\u306a\u3069\u306e\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u3092\u6271\u3046\u969b\u306f\u3001\u7279\u5225\u306a\u914d\u616e\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u306e\u51e6\u7406\njapanese_text = \"\u3053\u3093\u306b\u3061\u306f\u4e16\u754c\"\n\n# \u30d0\u30a4\u30c8\u5358\u4f4d\u3067\u306e\u51e6\u7406\uff08\u975e\u63a8\u5968\uff09\nfirst_byte = japanese_text.slice(0)  # =&gt; \"\u3053\"\nsecond_byte = japanese_text.slice(1)  # =&gt; \u6587\u5b57\u5316\u3051\u306e\u53ef\u80fd\u6027\n\n# \u6587\u5b57\u5358\u4f4d\u3067\u306e\u9069\u5207\u306a\u51e6\u7406\ndef safe_slice_multibyte(text, start, length = nil)\n  if length\n    text.chars.slice(start, length).join\n  else\n    text.chars.slice(start)\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nfirst_char = safe_slice_multibyte(japanese_text, 0)     # =&gt; \"\u3053\"\ntwo_chars = safe_slice_multibyte(japanese_text, 1, 2)   # =&gt; \"\u3093\u306b\"\n\n# \u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u8003\u616e\u3057\u305f\u51e6\u7406\nclass MultibyteSafeString\n  def initialize(text)\n    @text = text\n  end\n\n  def slice_characters(start_pos, length = nil)\n    return @text.chars[start_pos] if length.nil?\n    @text.chars.slice(start_pos, length).join\n  end\n\n  def each_character_with_index\n    @text.chars.each_with_index do |char, index|\n      yield(char, index)\n    end\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u6587\u5b57\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308bslice\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5358\u7d14\u306a\u90e8\u5206\u6587\u5b57\u5217\u306e\u62bd\u51fa\u304b\u3089\u3001\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3057\u305f\u9ad8\u5ea6\u306a\u51e6\u7406\u3001\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u306e\u5b89\u5168\u306a\u51e6\u7406\u307e\u3067\u3001\u5e45\u5e83\u3044\u7528\u9014\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u3001\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u5217\u3078\u306e\u5bfe\u5fdc\u3092\u8003\u616e\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">slice\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u6642\u306e\u6700\u9069\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u51e6\u7406\u3059\u308b\u969b\u306eslice\u30e1\u30bd\u30c3\u30c9\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'benchmark'\n\n# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u306e\u305f\u3081\u306e\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\nlarge_array = (1..1_000_000).to_a\nlarge_string = \"x\" * 1_000_000\n\n# \u52b9\u7387\u7684\u306a\u914d\u5217\u51e6\u7406\ndef process_large_array(array, chunk_size = 1000)\n  (0...array.size).step(chunk_size) do |start|\n    chunk = array.slice(start, chunk_size)\n    yield chunk\n  end\nend\n\n# \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u5b9f\u88c5\ndef memory_efficient_processing(array)\n  memory_before = GetProcessMem.new.mb\n  process_large_array(array) do |chunk|\n    # \u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u306e\u51e6\u7406\n    GC.start # \u660e\u793a\u7684\u306a\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\n  end\n  memory_after = GetProcessMem.new.mb\n  puts \"Memory usage: #{(memory_after - memory_before).round(2)} MB\"\nend\n\n# \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\nBenchmark.bm do |x|\n  x.report(\"Single slice:\") { large_array.slice(0, 1000) }\n  x.report(\"Multiple slices:\") { \n    10.times { |i| large_array.slice(i * 1000, 1000) }\n  }\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ChunkOptimizer\n  def self.find_optimal_chunk_size(array, min_size = 100, max_size = 10000)\n    results = {}\n\n    [min_size, max_size\/2, max_size].each do |size|\n      time = Benchmark.realtime do\n        process_large_array(array, size) { |chunk| chunk.sum }\n      end\n      results[size] = time\n    end\n\n    results.min_by { |_, time| time }.first\n  end\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class MemoryEfficientProcessor\n  def initialize(data)\n    @data = data\n  end\n\n  def process_in_batches(batch_size = 1000)\n    total_batches = (@data.size \/ batch_size.to_f).ceil\n\n    total_batches.times do |batch_num|\n      start_idx = batch_num * batch_size\n      batch = @data.slice(start_idx, batch_size)\n\n      yield batch\n\n      # \u30d0\u30c3\u30c1\u51e6\u7406\u5f8c\u306e\u30e1\u30e2\u30ea\u89e3\u653e\n      batch = nil\n      GC.start if (batch_num + 1) % 10 == 0\n    end\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6700\u9069\u5316\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-24\">1. \u53c2\u7167\u306e\u52b9\u7387\u7684\u306a\u7ba1\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ReferenceManager\n  def self.slice_with_reference_cleanup(array, start, length)\n    result = array.slice(start, length)\n    # \u4e0d\u8981\u306a\u53c2\u7167\u3092\u89e3\u653e\n    original = nil\n    GC.start\n    result\n  end\n\n  def self.process_with_minimal_memory(array)\n    array.each_slice(1000) do |slice|\n      # \u30b9\u30e9\u30a4\u30b9\u306e\u51e6\u7406\n      processed = yield(slice)\n      # \u4e2d\u9593\u7d50\u679c\u306e\u89e3\u653e\n      slice = nil\n      processed = nil\n    end\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">2. \u5927\u898f\u6a21\u6587\u5b57\u5217\u51e6\u7406\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class StringSliceOptimizer\n  def self.process_large_string(string, chunk_size = 1024)\n    offset = 0\n    result = []\n\n    while offset &lt; string.length\n      chunk = string.slice(offset, chunk_size)\n      result &lt;&lt; yield(chunk)\n      offset += chunk_size\n\n      # \u4e2d\u9593\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u89e3\u653e\n      chunk = nil\n      GC.start if offset % (chunk_size * 10) == 0\n    end\n\n    result\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u8868<\/h4>\n\n\n<div id=\"id-ff866546-18b9-4ad1-a2ef-740d39d34adf\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u51e6\u7406\u65b9\u6cd5<\/th><th>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/th><th>\u51e6\u7406\u901f\u5ea6<\/th><th>\u9069\u7528\u5834\u9762<\/th><\/tr><\/thead><tbody><tr><td>\u5358\u4e00slice<\/td><td>\u4f4e<\/td><td>\u9ad8\u901f<\/td><td>\u5c0f\u898f\u6a21\u30c7\u30fc\u30bf<\/td><\/tr><tr><td>\u30d0\u30c3\u30c1\u51e6\u7406<\/td><td>\u4e2d<\/td><td>\u4e2d\u901f<\/td><td>\u4e2d\u898f\u6a21\u30c7\u30fc\u30bf<\/td><\/tr><tr><td>\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406<\/td><td>\u4f4e<\/td><td>\u4f4e\u901f<\/td><td>\u5927\u898f\u6a21\u30c7\u30fc\u30bf<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">\u5b9f\u88c5\u4f8b\u3068\u30d9\u30f3\u30c1\u30de\u30fc\u30af<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'benchmark\/ips'\n\ndef benchmark_slice_performance\n  Benchmark.ips do |x|\n    array = (1..100_000).to_a\n\n    x.report(\"\u5358\u4e00slice\") { array.slice(0, 1000) }\n\n    x.report(\"\u30d0\u30c3\u30c1\u51e6\u7406\") do\n      array.each_slice(1000) { |batch| batch.sum }\n    end\n\n    x.report(\"\u6700\u9069\u5316\u51e6\u7406\") do\n      ChunkOptimizer.process_large_array(array) { |chunk| chunk.sum }\n    end\n\n    x.compare!\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u3082\u52b9\u7387\u7684\u306aslice\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u51e6\u7406\u901f\u5ea6\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u306a\u304c\u3089\u3001\u9069\u5207\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-28\">\u3088\u304f\u3042\u308b\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-29\">nil\u767a\u751f\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u5bfe\u7b56<\/h3>\n\n\n\n<p>slice\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308bnil\u306e\u767a\u751f\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u5bfe\u51e6\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-30\">1. \u7bc4\u56f2\u5916\u30a2\u30af\u30bb\u30b9\u306b\u3088\u308bnil<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u3088\u304f\u3042\u308b\u554f\u984c\u30d1\u30bf\u30fc\u30f3\narray = [1, 2, 3]\nresult = array.slice(5)  # =&gt; nil\n\n# \u5b89\u5168\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\ndef safe_slice(array, index)\n  array.slice(index) || \"\u8981\u7d20\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\"\nend\n\n# \u3088\u308a\u67d4\u8edf\u306a\u5b9f\u88c5\ndef flexible_slice(array, index, default: nil)\n  array.slice(index) || default\nend\n\n# \u4f7f\u7528\u4f8b\narray = [1, 2, 3]\nputs safe_slice(array, 5)     # =&gt; \"\u8981\u7d20\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\"\nputs flexible_slice(array, 5, default: 0)  # =&gt; 0<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-31\">2. \u7121\u52b9\u306a\u7bc4\u56f2\u6307\u5b9a\u306b\u3088\u308b\u30a8\u30e9\u30fc<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\narray = [1, 2, 3]\nresult = array.slice(3..5)  # =&gt; nil\n\n# \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u5b9f\u88c5\ndef safe_range_slice(array, range)\n  return [] if range.begin &gt; array.size\n  end_index = [range.end, array.size - 1].min\n  start_index = [range.begin, 0].max\n  array.slice(start_index..end_index) || []\nend\n\n# \u4f7f\u7528\u4f8b\narray = [1, 2, 3, 4, 5]\nresult = safe_range_slice(array, 2..10)  # =&gt; [3, 4, 5]<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9slice!\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>slice!\u30e1\u30bd\u30c3\u30c9\u306f\u5143\u306e\u914d\u5217\u3084\u6587\u5b57\u5217\u3092\u5909\u66f4\u3059\u308b\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u305d\u306e\u7279\u5fb4\u3068\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">slice vs slice!\u306e\u9055\u3044<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># slice\u306e\u5834\u5408\uff08\u975e\u7834\u58ca\u7684\uff09\narray1 = [1, 2, 3, 4, 5]\nsliced1 = array1.slice(1..3)\nputs \"Sliced: #{sliced1}\"      # =&gt; [2, 3, 4]\nputs \"Original: #{array1}\"     # =&gt; [1, 2, 3, 4, 5]\n\n# slice!\u306e\u5834\u5408\uff08\u7834\u58ca\u7684\uff09\narray2 = [1, 2, 3, 4, 5]\nsliced2 = array2.slice!(1..3)\nputs \"Sliced: #{sliced2}\"      # =&gt; [2, 3, 4]\nputs \"Original: #{array2}\"     # =&gt; [1, 5]<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">\u5b89\u5168\u306a\u7834\u58ca\u7684\u64cd\u4f5c\u306e\u5b9f\u88c5<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class SafeArrayOperations\n  def initialize(array)\n    @array = array.dup  # \u5143\u306e\u914d\u5217\u306e\u30b3\u30d4\u30fc\u3092\u4fdd\u6301\n  end\n\n  def safe_slice!(range_or_index)\n    # \u64cd\u4f5c\u524d\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u4f5c\u6210\n    backup = @array.dup\n    begin\n      result = @array.slice!(range_or_index)\n      raise \"Invalid slice operation\" if result.nil? &amp;&amp; !range_or_index.is_a?(Integer)\n      result\n    rescue =&gt; e\n      # \u30a8\u30e9\u30fc\u767a\u751f\u6642\u306f\u5143\u306e\u72b6\u614b\u306b\u5fa9\u5143\n      @array.replace(backup)\n      raise e\n    end\n  end\n\n  def revert_to_original\n    @array.replace(@original)\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nhandler = SafeArrayOperations.new([1, 2, 3, 4, 5])\nbegin\n  result = handler.safe_slice!(1..3)\n  puts \"Success: #{result}\"\nrescue =&gt; e\n  puts \"Error: #{e.message}\"\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">\u5b9f\u8df5\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30d1\u30bf\u30fc\u30f3<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">module SliceErrorHandler\n  def self.handle_slice_operation\n    yield\n  rescue NoMethodError =&gt; e\n    puts \"\u7121\u52b9\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3059\u308bslice\u64cd\u4f5c\u3067\u3059: #{e.message}\"\n    nil\n  rescue RangeError =&gt; e\n    puts \"\u7121\u52b9\u306a\u7bc4\u56f2\u6307\u5b9a\u3067\u3059: #{e.message}\"\n    nil\n  rescue ArgumentError =&gt; e\n    puts \"\u5f15\u6570\u304c\u4e0d\u6b63\u3067\u3059: #{e.message}\"\n    nil\n  rescue =&gt; e\n    puts \"\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: #{e.message}\"\n    nil\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nresult = SliceErrorHandler.handle_slice_operation do\n  [1, 2, 3].slice(-10..10)\nend\n\n# \u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u5225\u306e\u5bfe\u51e6\u65b9\u6cd5\ndef comprehensive_slice(array, index_or_range)\n  SliceErrorHandler.handle_slice_operation do\n    case index_or_range\n    when Integer\n      array.slice(index_or_range)\n    when Range\n      if index_or_range.begin &lt; 0 || index_or_range.end &lt; 0\n        handle_negative_range(array, index_or_range)\n      else\n        array.slice(index_or_range)\n      end\n    else\n      raise ArgumentError, \"Invalid argument type\"\n    end\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5bfe\u7b56\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001slice\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u306b\u95a2\u9023\u3059\u308b\u30d0\u30b0\u3092\u52b9\u679c\u7684\u306b\u9632\u304e\u3001\u3088\u308a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u3001\u7834\u58ca\u7684\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3068\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6a5f\u80fd\u306e\u5b9f\u88c5\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-36\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u96c6<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">CSV\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u6d3b\u7528\u4f8b<\/h3>\n\n\n\n<p>CSV\u30d5\u30a1\u30a4\u30eb\u306e\u51e6\u7406\u3067slice\u30e1\u30bd\u30c3\u30c9\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'csv'\n\nclass CSVProcessor\n  def initialize(file_path)\n    @data = CSV.read(file_path)\n  end\n\n  # \u30d8\u30c3\u30c0\u30fc\u884c\u306e\u53d6\u5f97\n  def headers\n    @data.slice(0)\n  end\n\n  # \u6307\u5b9a\u3057\u305f\u5217\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n  def column_data(column_index)\n    @data.slice(1..-1).map { |row| row.slice(column_index) }\n  end\n\n  # \u30c7\u30fc\u30bf\u306e\u30d0\u30c3\u30c1\u51e6\u7406\n  def process_in_batches(batch_size = 1000)\n    current_row = 1  # \u30d8\u30c3\u30c0\u30fc\u3092\u30b9\u30ad\u30c3\u30d7\n    while current_row &lt; @data.size\n      batch = @data.slice(current_row, batch_size)\n      yield batch\n      current_row += batch_size\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nprocessor = CSVProcessor.new('large_dataset.csv')\n\n# \u30d8\u30c3\u30c0\u30fc\u60c5\u5831\u306e\u53d6\u5f97\nheaders = processor.headers\nputs \"CSV Headers: #{headers.join(', ')}\"\n\n# \u7279\u5b9a\u306e\u5217\u306e\u30c7\u30fc\u30bf\u5206\u6790\ncolumn_values = processor.column_data(2)\naverage = column_values.map(&amp;:to_f).sum \/ column_values.size\n\n# \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u5b9f\u884c\nprocessor.process_in_batches do |batch|\n  # \u30d0\u30c3\u30c1\u3054\u3068\u306e\u51e6\u7406\n  batch.each do |row|\n    # \u30c7\u30fc\u30bf\u51e6\u7406\u30ed\u30b8\u30c3\u30af\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-38\">API\u5fdc\u7b54\u51e6\u7406\u3067\u306e\u5fdc\u7528\u4f8b<\/h3>\n\n\n\n<p>API\u30ec\u30b9\u30dd\u30f3\u30b9\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u306b\u304a\u3051\u308bslice\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">require 'json'\nrequire 'net\/http'\n\nclass APIResponseHandler\n  def initialize(response_data)\n    @data = JSON.parse(response_data)\n  end\n\n  # \u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\n  def paginate_results(page, per_page)\n    start_index = (page - 1) * per_page\n    @data['results'].slice(start_index, per_page)\n  end\n\n  # \u5fc5\u8981\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u62bd\u51fa\n  def extract_fields(items, fields)\n    items.map do |item|\n      fields.each_with_object({}) do |field, result|\n        keys = field.split('.')\n        value = keys.reduce(item) { |acc, key| acc&amp;.[](key) }\n        result[field] = value\n      end\n    end\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nresponse_data = {\n  'results' =&gt; (1..100).map { |i| \n    {\n      'id' =&gt; i,\n      'user' =&gt; { 'name' =&gt; \"User#{i}\", 'email' =&gt; \"user#{i}@example.com\" },\n      'data' =&gt; { 'value' =&gt; i * 100 }\n    }\n  }\n}.to_json\n\nhandler = APIResponseHandler.new(response_data)\n\n# \u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\npage_results = handler.paginate_results(2, 10)  # 2\u30da\u30fc\u30b8\u76ee\u300110\u4ef6\u305a\u3064\n\n# \u7279\u5b9a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u62bd\u51fa\nfields = ['id', 'user.name', 'data.value']\nfiltered_data = handler.extract_fields(page_results, fields)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u51e6\u7406\u3067\u306e\u5fdc\u7528\u4f8b<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u51e6\u7406\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class TextFileProcessor\n  def initialize(file_path)\n    @file_path = file_path\n  end\n\n  # \u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u306e\u8aad\u307f\u8fbc\u307f\u3068\u51e6\u7406\n  def process_by_chunks(chunk_size = 1024)\n    File.open(@file_path, 'r') do |file|\n      while chunk = file.read(chunk_size)\n        # \u30c1\u30e3\u30f3\u30af\u306e\u672b\u5c3e\u3092\u884c\u5358\u4f4d\u306b\u8abf\u6574\n        last_newline = chunk.rindex(\"\\n\")\n        if last_newline\n          file.seek(-(chunk.size - last_newline - 1), IO::SEEK_CUR)\n          chunk = chunk.slice(0..last_newline)\n        end\n\n        yield chunk\n      end\n    end\n  end\n\n  # \u884c\u5358\u4f4d\u3067\u306e\u51e6\u7406\n  def process_lines(batch_size = 1000)\n    current_batch = []\n\n    File.foreach(@file_path) do |line|\n      current_batch &lt;&lt; line\n\n      if current_batch.size &gt;= batch_size\n        yield current_batch\n        current_batch = []\n      end\n    end\n\n    yield current_batch unless current_batch.empty?\n  end\n\n  # \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u7279\u5b9a\u90e8\u5206\u306e\u62bd\u51fa\n  def extract_patterns(pattern)\n    matches = []\n    process_lines do |batch|\n      batch.each do |line|\n        if match = line.slice(pattern)\n          matches &lt;&lt; match\n        end\n      end\n    end\n    matches\n  end\nend\n\n# \u4f7f\u7528\u4f8b\nprocessor = TextFileProcessor.new('large_log_file.txt')\n\n# \u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u306e\u51e6\u7406\nprocessor.process_by_chunks do |chunk|\n  # \u30c1\u30e3\u30f3\u30af\u3054\u3068\u306e\u51e6\u7406\n  puts \"Processing chunk of size: #{chunk.size}\"\nend\n\n# \u884c\u5358\u4f4d\u3067\u306e\u30d0\u30c3\u30c1\u51e6\u7406\nprocessor.process_lines(1000) do |batch|\n  # \u30d0\u30c3\u30c1\u51e6\u7406\n  puts \"Processing batch of #{batch.size} lines\"\nend\n\n# \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\nemail_pattern = \/\\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Z|a-z]{2,}\\b\/\nemails = processor.extract_patterns(email_pattern)<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u76f4\u9762\u3059\u308b\u5178\u578b\u7684\u306a\u8ab2\u984c\u306b\u5bfe\u3059\u308bslice\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u4f7f\u7528\u304c\u6c42\u3081\u3089\u308c\u308b\u5834\u9762\u3067\u3001\u305d\u306e\u771f\u4fa1\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-40\">slice\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-41\">\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306eslice\u30e1\u30bd\u30c3\u30c9\u3092\u6d3b\u7528\u3057\u305f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">1. \u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c\u306e\u7c21\u7d20\u5316<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\nclass UserDataProcessor\n  def extract_user_data(data)\n    result = []\n    i = 0\n    while i &lt; data.length\n      user_data = []\n      3.times do |j|\n        break if i + j &gt;= data.length\n        user_data &lt;&lt; data[i + j]\n      end\n      result &lt;&lt; user_data if user_data.length == 3\n      i += 3\n    end\n    result\n  end\nend\n\n# \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c\nclass UserDataProcessor\n  def extract_user_data(data)\n    data.each_slice(3).select { |group| group.length == 3 }.to_a\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-43\">2. \u6761\u4ef6\u5206\u5c90\u306e\u5358\u7d14\u5316<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\ndef process_log_entry(log_line)\n  timestamp = ''\n  message = ''\n  if log_line.length &gt;= 23\n    timestamp = log_line[0, 23]\n    if log_line.length &gt; 23\n      message = log_line[24..-1]\n    end\n  end<\/pre>\n\n\n[timestamp, message]\n\n\n\n<p>end # \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c def process_log_entry(log_line) [ log_line.slice(0..22), log_line.slice(23..-1) ] end<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-44\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u30b3\u30fc\u30c9\u6539\u5584\u4f8b<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-45\">1. \u30c7\u30fc\u30bf\u51e6\u7406\u30af\u30e9\u30b9\u306e\u6539\u5584<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\nclass DataProcessor\n  def initialize(data)\n    @data = data\n  end\n\n  def process_first_chunk\n    chunk = []\n    10.times do |i|\n      break if i &gt;= @data.length\n      chunk &lt;&lt; @data[i]\n    end\n    process_chunk(chunk)\n  end\n\n  def process_middle_chunk\n    return [] if @data.length &lt; 20\n    chunk = []\n    10.times do |i|\n      index = i + 10\n      break if index &gt;= @data.length\n      chunk &lt;&lt; @data[index]\n    end\n    process_chunk(chunk)\n  end\n\n  private\n\n  def process_chunk(chunk)\n    # \u30c1\u30e3\u30f3\u30af\u51e6\u7406\u30ed\u30b8\u30c3\u30af\n    chunk.map { |item| item * 2 }\n  end\nend\n\n# \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c\nclass DataProcessor\n  def initialize(data)\n    @data = data\n  end\n\n  def process_chunk(start_index, size = 10)\n    chunk = @data.slice(start_index, size) || []\n    return [] if chunk.empty?\n    chunk.map { |item| item * 2 }\n  end\n\n  def process_first_chunk\n    process_chunk(0)\n  end\n\n  def process_middle_chunk\n    process_chunk(10)\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-46\">2. \u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3068\u518d\u5229\u7528\u6027\u306e\u5411\u4e0a<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\nclass TextProcessor\n  def process_text(text)\n    # \u30d8\u30c3\u30c0\u30fc\u306e\u51e6\u7406\n    header = ''\n    header_end = text.index(\"\\n\\n\")\n    if header_end\n      header = text[0...header_end]\n      body = text[(header_end + 2)..-1]\n    else\n      body = text\n    end\n\n    # \u30dc\u30c7\u30a3\u306e\u51e6\u7406\n    paragraphs = []\n    current_pos = 0\n    while current_pos &lt; body.length\n      next_pos = body.index(\"\\n\\n\", current_pos)\n      if next_pos\n        paragraphs &lt;&lt; body[current_pos...next_pos]\n        current_pos = next_pos + 2\n      else\n        paragraphs &lt;&lt; body[current_pos..-1]\n        break\n      end\n    end<\/pre>\n\n\n[header, paragraphs]\n\n\n\n<p>end end # \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c module TextProcessing module Splitter def self.split_header(text) parts = text.split(\u201c\\n\\n\u201d, 2) [parts[0], parts[1] || \u201d] end def self.split_paragraphs(text) text.split(\u201c\\n\\n\u201d).map(&amp;:strip) end end end class TextProcessor include TextProcessing def process_text(text) header, body = TextProcessing::Splitter.split_header(text) paragraphs = TextProcessing::Splitter.split_paragraphs(body)<\/p>\n\n\n[header, paragraphs]\n\n\n\n<p>end end<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-47\">3. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u6539\u5584<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\nclass StringManipulator\n  def cleanup_text(text)\n    # \u524d\u5f8c\u306e\u7a7a\u767d\u3092\u524a\u9664\n    text = text.strip\n    # \u6700\u521d\u306e100\u6587\u5b57\u3092\u53d6\u5f97\n    text = text[0...100] if text.length &gt; 100\n    # \u6700\u5f8c\u306e\u6587\u3092\u5b8c\u5168\u306a\u5f62\u3067\u7d42\u308f\u3089\u305b\u308b\n    last_sentence_end = text.rindex(\/[.!?]\/)\n    text = text[0..last_sentence_end] if last_sentence_end\n    # \u7279\u6b8a\u6587\u5b57\u3092\u524a\u9664\n    text.gsub(\/[^a-zA-Z0-9\\s.,!?]\/, '')\n  end\nend\n\n# \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c\nclass StringManipulator\n  def cleanup_text(text)\n    text\n      .strip\n      .then { |t| t.slice(0, 100) }\n      .then { |t| complete_last_sentence(t) }\n      .gsub(\/[^a-zA-Z0-9\\s.,!?]\/, '')\n  end\n\n  private\n\n  def complete_last_sentence(text)\n    last_sentence_end = text.rindex(\/[.!?]\/)\n    last_sentence_end ? text.slice(0..last_sentence_end) : text\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b\u306f\u3001slice\u30e1\u30bd\u30c3\u30c9\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u4fdd\u5b88\u6027\u3001\u518d\u5229\u7528\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u3001\u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c\u3084\u6587\u5b57\u5217\u51e6\u7406\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u308b\u70b9\u304c\u3001slice\u30e1\u30bd\u30c3\u30c9\u306e\u5927\u304d\u306a\u5229\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u3053\u308c\u3089\u306e\u6539\u5584\u306b\u3088\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u30d0\u30b0\u306e\u767a\u751f\u30ea\u30b9\u30af\u304c\u4f4e\u4e0b\u3059\u308b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u304c\u66f8\u304d\u3084\u3059\u304f\u306a\u308b<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u304c\u5bb9\u6613\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u884c\u3046\u969b\u306f\u3001\u5e38\u306b\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u306a\u304c\u3089\u3001\u9069\u5207\u306a\u62bd\u8c61\u5316\u30ec\u30d9\u30eb\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in 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