Ruby\u306e\u914d\u5217\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u672c\u7684\u304b\u3064\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u3001Ruby\u306e\u914d\u5217\u3092\u5b8c\u5168\u306b\u30de\u30b9\u30bf\u30fc\u3059\u308b\u305f\u3081\u306e20\u306e\u5f37\u529b\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002
\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u304b\u3089\u9ad8\u5ea6\u306a\u6700\u9069\u5316\u307e\u3067\u3001\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
Ruby\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3076\u4e0a\u3067\u3001\u914d\u5217\uff08Array\uff09\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002
\u3053\u306e\u7ae0\u3067\u306f\u3001Ruby\u914d\u5217\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u304b\u3089\u4f7f\u3044\u65b9\u307e\u3067\u3001\u521d\u5fc3\u8005\u306e\u65b9\u306b\u3082\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u914d\u5217\u306f\u3001\u8907\u6570\u306e\u8981\u7d20\u3092\u9806\u5e8f\u4ed8\u3051\u3066\u683c\u7d0d\u3067\u304d\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002
Ruby\u306e\u914d\u5217\u306f\u975e\u5e38\u306b\u67d4\u8edf\u3067\u3001\u7570\u306a\u308b\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u540c\u3058\u914d\u5217\u5185\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# \u6574\u6570\u3001\u6587\u5b57\u5217\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3092\u542b\u3080\u914d\u5217\nmixed_array = [1, \"Hello\", 3.14]<\/pre>\n\n\n\n\u914d\u5217\u306f\u3001\u30c7\u30fc\u30bf\u306e\u96c6\u5408\u3092\u6271\u3046\u969b\u306b\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3001\u591a\u304f\u306eRuby\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u914d\u5217\u306e\u4f5c\u6210\u65b9\u6cd5\uff1a\u3055\u307e\u3056\u307e\u306a\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
Ruby\u3067\u306f\u3001\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
1. \u89d2\u62ec\u5f27\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\uff08\u914d\u5217\u30ea\u30c6\u30e9\u30eb\uff09<\/h4>\n\n\n\n
fruits = [\"apple\", \"banana\", \"orange\"]<\/pre>\n\n\n\n2.
Array.new<\/code>\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/h4>\n\n\n\nnumbers = Array.new(3, 0) # [0, 0, 0]<\/pre>\n\n\n\n3. %\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/h4>\n\n\n\n
colors = %w[red green blue] # [\"red\", \"green\", \"blue\"]<\/pre>\n\n\n\n\u914d\u5217\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u64cd\u4f5c\uff1a\u57fa\u672c\u7684\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u64cd\u4f5c<\/h3>\n\n\n\n
\u914d\u5217\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08\u6dfb\u5b57\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
Ruby\u3067\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f0\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\nfruits = [\"apple\", \"banana\", \"orange\"]\nputs fruits[0] # \"apple\"\nputs fruits[1] # \"banana\"\nputs fruits[-1] # \"orange\" (\u6700\u5f8c\u306e\u8981\u7d20)<\/pre>\n\n\n\n\u8981\u7d20\u306e\u8ffd\u52a0\u3084\u524a\u9664\u3082\u7c21\u5358\u306b\u884c\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
fruits.push(\"grape\") # \u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\nfruits << \"melon\" # <<\u6f14\u7b97\u5b50\u3067\u3082\u8ffd\u52a0\u53ef\u80fd\nfruits.pop # \u672b\u5c3e\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u3066\u8fd4\u3059\nfruits.shift # \u5148\u982d\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u3066\u8fd4\u3059\nfruits.unshift(\"kiwi\") # \u5148\u982d\u306b\u8981\u7d20\u3092\u8ffd\u52a0<\/pre>\n\n\n\n\u4ee5\u4e0a\u304c\u3001Ruby\u914d\u5217\u306e\u57fa\u790e\u3067\u3059\u3002\u914d\u5217\u306f\u975e\u5e38\u306b\u5f37\u529b\u3067\u67d4\u8edf\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3042\u308a\u3001Ruby\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002
\u6b21\u306e\u7ae0\u3067\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u914d\u5217\u306e\u64cd\u4f5c\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<\/i><\/span>\u6f14\u7fd2\u554f\u984c<\/div><\/div>\n\n
- 5\u3064\u306e\u7570\u306a\u308b\u679c\u7269\u540d\u3092\u542b\u3080\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u4f5c\u6210\u3057\u305f\u914d\u5217\u306e3\u756a\u76ee\u306e\u8981\u7d20\u3092\u51fa\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u914d\u5217\u306e\u6700\u5f8c\u306b\u65b0\u3057\u3044\u679c\u7269\u3092\u8ffd\u52a0\u3057\u3001\u305d\u306e\u5f8c\u3001\u6700\u521d\u306e\u679c\u7269\u3092\u524a\u9664\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u3053\u308c\u3089\u306e\u6f14\u7fd2\u3092\u901a\u3058\u3066\u3001\u57fa\u672c\u7684\u306a\u914d\u5217\u306e\u64cd\u4f5c\u3092\u7df4\u7fd2\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
2. \u914d\u5217\u306e\u4e3b\u8981\u30e1\u30bd\u30c3\u30c9\u30de\u30b9\u30bf\u30fc\uff1a\u65e5\u5e38\u7684\u306b\u4f7f\u3048\u308b10\u306e\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n
Ruby\u306e\u914d\u5217\u306f\u975e\u5e38\u306b\u5f37\u529b\u3067\u3001\u591a\u304f\u306e\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002
\u3053\u3053\u3067\u306f\u3001\u65e5\u5e38\u7684\u306b\u4f7f\u3048\u308b10\u306e\u4e3b\u8981\u306aRuby\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u5b9f\u73fe\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\uff1apush, pop, shift, unshift \u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528<\/h3>\n\n\n\n
1.
push<\/code> \u3068pop<\/code>\uff1a\u914d\u5217\u306e\u672b\u5c3e\u3078\u306e\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664<\/h4>\n\n\n\nfruits = [\"apple\", \"banana\"]\n fruits.push(\"orange\") # => [\"apple\", \"banana\", \"orange\"]\n last_fruit = fruits.pop # => \"orange\"\n # fruits \u306f now [\"apple\", \"banana\"]<\/pre>\n\n\n\n2.
shift<\/code> \u3068unshift<\/code>\uff1a\u914d\u5217\u306e\u5148\u982d\u3078\u306e\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664<\/h4>\n\n\n\nfruits = [\"apple\", \"banana\"]\n fruits.unshift(\"orange\") # => [\"orange\", \"apple\", \"banana\"]\n first_fruit = fruits.shift # => \"orange\"\n # fruits \u306f now [\"apple\", \"banana\"]<\/pre>\n\n\n\n\u914d\u5217\u306e\u5909\u63db\u3068\u52a0\u5de5\uff1amap, select, reject \u30e1\u30bd\u30c3\u30c9\u306e\u5a01\u529b<\/h3>\n\n\n\n
3.
map<\/code>\uff1a\u5404\u8981\u7d20\u3092\u5909\u63db\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210<\/h4>\n\n\n\nnumbers = [1, 2, 3, 4, 5]\n squares = numbers.map { |n| n**2 } # => [1, 4, 9, 16, 25]<\/pre>\n\n\n\n4.
select<\/code> \u3068reject<\/code>\uff1a\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u8981\u7d20\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h4>\n\n\n\nnumbers = [1, 2, 3, 4, 5]\n even_numbers = numbers.select { |n| n.even? } # => [2, 4]\n odd_numbers = numbers.reject { |n| n.even? } # => [1, 3, 5]<\/pre>\n\n\n\n\u914d\u5217\u306e\u7d50\u5408\u3068\u5206\u5272\uff1ajoin, split \u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n
5.
join<\/code>\uff1a\u914d\u5217\u306e\u8981\u7d20\u3092\u6587\u5b57\u5217\u306b\u7d50\u5408<\/h4>\n\n\n\nfruits = [\"apple\", \"banana\", \"orange\"]\n fruits_string = fruits.join(\", \") # => \"apple, banana, orange\"<\/pre>\n\n\n\n6.
split<\/code>\uff1a\u6587\u5b57\u5217\u3092\u914d\u5217\u306b\u5206\u5272\uff08\u6587\u5b57\u5217\u30e1\u30bd\u30c3\u30c9\u3060\u304c\u3001\u914d\u5217\u3068\u5bc6\u63a5\u306b\u95a2\u9023\uff09<\/h4>\n\n\n\nfruits_string = \"apple, banana, orange\"\n fruits_array = fruits_string.split(\", \") # => [\"apple\", \"banana\", \"orange\"]<\/pre>\n\n\n\n\u914d\u5217\u306e\u4e26\u3079\u66ff\u3048\u3068\u30e6\u30cb\u30fc\u30af\u5316\uff1asort, uniq \u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5<\/h3>\n\n\n\n
7.
sort<\/code>\uff1a\u914d\u5217\u306e\u8981\u7d20\u3092\u4e26\u3079\u66ff\u3048<\/h4>\n\n\n\nnumbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5]\n sorted_numbers = numbers.sort # => [1, 1, 2, 3, 3, 4, 5, 5, 5, 6, 9]<\/pre>\n\n\n\n8.
uniq<\/code>\uff1a\u91cd\u8907\u3059\u308b\u8981\u7d20\u3092\u9664\u53bb<\/h4>\n\n\n\nnumbers = [1, 2, 2, 3, 3, 3, 4, 4, 5]\n unique_numbers = numbers.uniq # => [1, 2, 3, 4, 5]<\/pre>\n\n\n\n9.
flatten<\/code>\uff1a\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u3092\u5e73\u5766\u5316<\/h4>\n\n\n\nnested_array = [1, [2, 3, [4, 5]], 6]\n flat_array = nested_array.flatten # => [1, 2, 3, 4, 5, 6]<\/pre>\n\n\n\n10.
each_with_index<\/code>\uff1a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u304d\u3067\u5404\u8981\u7d20\u3092\u51e6\u7406<\/h4>\n\n\n\nnested_array = [1, [2, 3, [4, 5]], 6]\n flat_array = nested_array.flatten # => [1, 2, 3, 4, 5, 6] fruits = [\"apple\", \"banana\", \"orange\"]\n fruits.each_with_index do |fruit, index|\n puts \"#{index + 1}. #{fruit}\"\n end\n # \u51fa\u529b:\n # 1. apple\n # 2. banana\n # 3. orange<\/pre>\n\n\n\n\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c\u3082\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002
\u4f8b\u3048\u3070\u3001\u6587\u5b57\u5217\u306e\u914d\u5217\u304b\u3089\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u3092\u62bd\u51fa\u3057\u3001\u5927\u6587\u5b57\u306b\u5909\u63db\u3057\u3066\u4e26\u3079\u66ff\u3048\u308b\u51e6\u7406\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\nwords = [\"apple\", \"banana\", \"cherry\", \"date\", \"elderberry\"]\nresult = words.select { |word| word.length > 5 }\n .map(&:upcase)\n .sort\n# => [\"BANANA\", \"CHERRY\", \"ELDERBERRY\"]<\/pre>\n\n\n\n<\/i><\/span>\u6f14\u7fd2\u554f\u984c<\/div><\/div>\n\n
- 1\u304b\u308910\u307e\u3067\u306e\u6570\u5b57\u306e\u914d\u5217\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u4e2d\u304b\u3089\u5947\u6570\u306e\u307f\u3092\u9078\u629e\u3057\u30662\u4e57\u3057\u305f\u7d50\u679c\u3092\u5f97\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- [\u201cred\u201d, \u201cgreen\u201d, \u201cblue\u201d, \u201cyellow\u201d]\u3068\u3044\u3046\u914d\u5217\u304b\u3089\u30014\u6587\u5b57\u4ee5\u4e0a\u306e\u8272\u540d\u3092\u5927\u6587\u5b57\u306b\u5909\u63db\u3057\u3001\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u306b\u4e26\u3079\u66ff\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u201cThe quick brown fox jumps over the lazy dog\u201d\u3068\u3044\u3046\u6587\u3092\u5358\u8a9e\u306b\u5206\u5272\u3057\u3001\u5404\u5358\u8a9e\u306e\u9577\u3055\u3092\u8981\u7d20\u3068\u3059\u308b\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u3053\u308c\u3089\u306e\u6f14\u7fd2\u3092\u901a\u3058\u3066\u3001\u5b66\u3093\u3060\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u8df5\u7684\u306b\u4f7f\u7528\u3059\u308b\u7df4\u7fd2\u3092\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
Ruby\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u30de\u30b9\u30bf\u30fc\u306f\u3001\u52b9\u7387\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n3. \u591a\u6b21\u5143\u914d\u5217\u3068\u30cd\u30b9\u30c8\uff1a\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u6271\u3044\u65b9<\/h2>\n\n\n\n
Ruby\u306e\u591a\u6b21\u5143\u914d\u5217\u306f\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002
\u3053\u306e\u7ae0\u3067\u306f\u30012\u6b21\u5143\u914d\u5217\u306e\u4f5c\u6210\u3068\u64cd\u4f5c\u3001\u305d\u3057\u3066\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3059\u3002<\/p>\n\n\n\n2\u6b21\u5143\u914d\u5217\u306e\u4f5c\u6210\u3068\u64cd\u4f5c\uff1a\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u30c7\u30fc\u30bf\u306e\u8868\u73fe<\/h3>\n\n\n\n
2\u6b21\u5143\u914d\u5217\u306f\u3001\u884c\u3068\u5217\u3092\u6301\u3064\u30c6\u30fc\u30d6\u30eb\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\u3092\u8868\u73fe\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002
\u4ee5\u4e0b\u306b\u30012\u6b21\u5143\u914d\u5217\u306e\u4f5c\u6210\u3068\u64cd\u4f5c\u306e\u57fa\u672c\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n# 2\u6b21\u5143\u914d\u5217\u306e\u4f5c\u6210\nmatrix = [\n [1, 2, 3],\n [4, 5, 6],\n [7, 8, 9]\n]\n\n# \u7279\u5b9a\u306e\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\nputs matrix[1][1] # => 5 (2\u884c\u76ee\u30012\u5217\u76ee\u306e\u8981\u7d20)\n\n# \u884c\u306e\u8ffd\u52a0\nmatrix << [10, 11, 12]\n\n# \u5217\u306e\u8ffd\u52a0\uff08\u5404\u884c\u306b\u65b0\u3057\u3044\u8981\u7d20\u3092\u8ffd\u52a0\uff09\nmatrix.each { |row| row << 0 }\n\n# 2\u6b21\u5143\u914d\u5217\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406\nmatrix.each do |row|\n row.each do |element|\n print \"#{element} \"\n end\n puts\nend<\/pre>\n\n\n\n2\u6b21\u5143\u914d\u5217\u306f\u3001\u30b0\u30ea\u30c3\u30c9\u30d9\u30fc\u30b9\u306e\u30b2\u30fc\u30e0\uff08\u30c1\u30a7\u30b9\u30dc\u30fc\u30c9\u306a\u3069\uff09\u3084\u3001\u8868\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\uff08\u30a8\u30af\u30bb\u30eb\u30b7\u30fc\u30c8\u306e\u3088\u3046\u306a\u3082\u306e\uff09\u3092\u8868\u73fe\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\uff1a\u6df1\u3055\u3092\u6301\u3064\u30c7\u30fc\u30bf\u306e\u64cd\u4f5c<\/h3>\n\n\n\n
\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306f\u3001\u968e\u5c64\u69cb\u9020\u3092\u6301\u3064\u30c7\u30fc\u30bf\u3092\u8868\u73fe\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002
\u4ee5\u4e0b\u306b\u3001\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306e\u51e6\u7406\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n# \u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\nnested_array = [1, [2, 3, [4, 5]], 6, [7, [8, 9]]]\n\n# flatten \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5e73\u5766\u5316\nflat_array = nested_array.flatten\nputs flat_array.inspect # => [1, 2, 3, 4, 5, 6, 7, 8, 9]\n\n# \u518d\u5e30\u7684\u306a\u51e6\u7406\ndef process_nested_array(array)\n array.each do |element|\n if element.is_a?(Array)\n process_nested_array(element)\n else\n puts element\n end\n end\nend\n\nprocess_nested_array(nested_array)<\/pre>\n\n\n\n\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u968e\u5c64\u69cb\u9020\u3084HTML\/XML\u306eDOM\u69cb\u9020\u306a\u3069\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u591a\u6b21\u5143\u914d\u5217\u3092\u52b9\u7387\u7684\u306b\u6271\u3046\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af4\u9078<\/div>\n\n
Array#transpose<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u884c\u3068\u5217\u3092\u5165\u308c\u66ff\u3048\u308b<\/li>\n\n\n\nArray#flatten(level)<\/code>\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u6df1\u3055\u307e\u3067\u5e73\u5766\u5316\u3059\u308b<\/li>\n\n\n\nArray#dig<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5b89\u5168\u306b\u30cd\u30b9\u30c8\u3055\u308c\u305f\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\nmatrix = [[1, 2], [3, 4], [5, 6]]\ntransposed = matrix.transpose\nputs transposed.inspect # => [[1, 3, 5], [2, 4, 6]]\n\nnested = [1, [2, [3, 4]]]\nputs nested.flatten(1).inspect # => [1, 2, [3, 4]]\n\ndeep_nested = [1, [2, [3, [4]]]]\nputs deep_nested.dig(1, 1, 0) # => 3<\/pre>\n\n\n\n\u591a\u6b21\u5143\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002
\u975e\u5e38\u306b\u6df1\u3044\u30cd\u30b9\u30c8\u306f\u907f\u3051\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30c7\u30fc\u30bf\u69cb\u9020\uff08\u30cf\u30c3\u30b7\u30e5\u306a\u3069\uff09\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<\/i><\/span>\u6f14\u7fd2\u554f\u984c<\/div><\/div>\n\n
- 3\u00d73\u306e\u9b54\u65b9\u9663\uff08\u5404\u884c\u3001\u5404\u5217\u3001\u5bfe\u89d2\u7dda\u306e\u548c\u304c\u540c\u3058\u306b\u306a\u308b\u884c\u5217\uff09\u3092\u8868\u73fe\u3059\u308b2\u6b21\u5143\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u4e0a\u8a18\u3067\u4f5c\u6210\u3057\u305f\u9b54\u65b9\u9663\u306e\u5404\u884c\u306e\u548c\u3001\u5404\u5217\u306e\u548c\u3001\u5bfe\u89d2\u7dda\u306e\u548c\u3092\u8a08\u7b97\u3057\u3001\u3059\u3079\u3066\u304c\u7b49\u3057\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
[[1, [2, 3]], [4, [5, [6, 7]]]]<\/code>\u3068\u3044\u3046\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u914d\u5217\u3092\u5b8c\u5168\u306b\u5e73\u5766\u5316\u305b\u305a\u306b\u3001\u6df1\u30551\u307e\u3067\u3060\u3051\u5e73\u5766\u5316\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n\u3053\u308c\u3089\u306e\u6f14\u7fd2\u3092\u901a\u3058\u3066\u3001\u591a\u6b21\u5143\u914d\u5217\u3068\u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306e\u64cd\u4f5c\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u3087\u3046\u3002
\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u52b9\u7387\u7684\u306b\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u5f37\u529b\u306aRuby\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n4. \u914d\u5217\u3068\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\uff1a\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u306e\u9054\u4eba\u306b\u306a\u308b<\/h2>\n\n\n\n
Ruby\u306e\u914d\u5217\u64cd\u4f5c\u306b\u304a\u3044\u3066\u3001\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\uff08\u7e70\u308a\u8fd4\u3057\u51e6\u7406\uff09\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002
\u3053\u306e\u7ae0\u3067\u306f\u3001\u4e3b\u8981\u306a\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3068\u305d\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3073\u3001\u52b9\u7387\u7684\u306a\u914d\u5217\u51e6\u7406\u306e\u9054\u4eba\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\neach, map, inject \u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051\uff1a\u72b6\u6cc1\u306b\u5fdc\u3058\u305f\u9078\u629e<\/h3>\n\n\n\n
1. each \u30e1\u30bd\u30c3\u30c9\uff1a\u30b7\u30f3\u30d7\u30eb\u306a\u7e70\u308a\u8fd4\u3057<\/h4>\n\n\n\n
each<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\u3092\u884c\u3046\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\nfruits = [\"apple\", \"banana\", \"cherry\"]\nfruits.each do |fruit|\n puts \"I love #{fruit}!\"\nend\n# \u51fa\u529b:\n# I love apple!\n# I love banana!\n# I love cherry!<\/pre>\n\n\n\n2. map \u30e1\u30bd\u30c3\u30c9\uff1a\u65b0\u3057\u3044\u914d\u5217\u306e\u751f\u6210<\/h4>\n\n\n\n
map<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5143\u306e\u914d\u5217\u306e\u5404\u8981\u7d20\u3092\u5909\u63db\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\nnumbers = [1, 2, 3, 4, 5]\nsquared = numbers.map { |n| n ** 2 }\nputs squared.inspect # [1, 4, 9, 16, 25]<\/pre>\n\n\n\n3. inject (reduce) \u30e1\u30bd\u30c3\u30c9\uff1a\u7d2f\u7a4d\u51e6\u7406<\/h4>\n\n\n\n
inject<\/code>\uff08\u5225\u540dreduce<\/code>\uff09\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u306e\u8981\u7d20\u3092\u96c6\u7d04\u3057\u3066\u5358\u4e00\u306e\u7d50\u679c\u3092\u5f97\u308b\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\nnumbers = [1, 2, 3, 4, 5]\nsum = numbers.inject(0) { |result, n| result + n }\nputs sum # 15<\/pre>\n\n\n\n\u30d6\u30ed\u30c3\u30af\u3068Proc\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u6280\u6cd5<\/h3>\n\n\n\n
\u30d6\u30ed\u30c3\u30af\u3068Proc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u518d\u5229\u7528\u53ef\u80fd\u306a\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# \u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u4f8b\n[1, 2, 3].each { |n| puts n * 2 }\n\n# Proc\u3092\u4f7f\u7528\u3057\u305f\u4f8b\ndouble = Proc.new { |n| n * 2 }\n[1, 2, 3].map(&double) # [2, 4, 6]\n\n# &:\u30e1\u30bd\u30c3\u30c9\u8a18\u6cd5\u3092\u4f7f\u7528\u3057\u305f\u7c21\u6f54\u306a\u8a18\u8ff0\n[\"apple\", \"banana\", \"cherry\"].map(&:upcase) # [\"APPLE\", \"BANANA\", \"CHERRY\"]<\/pre>\n\n\n\n\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/strong>\uff1a\u4e26\u5217\u51e6\u7406<\/p>\n\n\n\n
\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u4e26\u5217\u51e6\u7406\u3092\u4f7f\u7528\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
require 'parallel'\n\nnumbers = (1..1000000).to_a\nsum = Parallel.reduce(numbers) { |sum, n| sum + n }\nputs sum<\/pre>\n\n\n\n<\/i><\/span>\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/div><\/div>\n\n
- \u5927\u304d\u306a\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f
each<\/code>\u3088\u308a\u3082each_with_index<\/code>\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n- \u914d\u5217\u306e\u5909\u66f4\u304c\u5fc5\u8981\u306a\u3044\u5834\u5408\u306f
map<\/code>\u3088\u308a\u3082each<\/code>\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n- \u53ef\u80fd\u306a\u9650\u308a\u3001\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u6e1b\u3089\u3057\u3066\u304b\u3089\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u826f\u3044\u4f8b\nlarge_array = (1..1000000).to_a\nsum = 0\nlarge_array.each { |n| sum += n if n.even? }\n\n# \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u60aa\u3044\u4f8b\nlarge_array = (1..1000000).to_a\nsum = large_array.select(&:even?).inject(0, :+)<\/pre>\n\n\n\n<\/i><\/span>\u6f14\u7fd2\u554f\u984c<\/div><\/div>\n\n
- 1\u304b\u3089100\u307e\u3067\u306e\u6570\u5b57\u306e\u914d\u5217\u3092\u4f5c\u6210\u3057\u30013\u306e\u500d\u6570\u306e\u307f\u3092\u62bd\u51fa\u3057\u3066\u3001\u305d\u306e\u5408\u8a08\u3092\u8a08\u7b97\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- [\u201chello\u201d, \u201cworld\u201d, \u201cruby\u201d, \u201cprogramming\u201d]\u3068\u3044\u3046\u914d\u5217\u304c\u3042\u308a\u307e\u3059\u3002\u5404\u8981\u7d20\u3092\u9006\u9806\u306b\u3057\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- [1, 2, 3, 4, 5]\u3068\u3044\u3046\u914d\u5217\u304c\u3042\u308a\u307e\u3059\u3002\u96a3\u308a\u5408\u3046\u8981\u7d20\u306e\u7a4d\u3092\u8981\u7d20\u3068\u3059\u308b\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002\uff08\u7d50\u679c\u306f[2, 6, 12, 20]\u306b\u306a\u308b\u306f\u305a\u3067\u3059\uff09<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u3053\u308c\u3089\u306e\u6f14\u7fd2\u3092\u901a\u3058\u3066\u3001\u914d\u5217\u306e\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u6280\u6cd5\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306aRuby\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u7df4\u7fd2\u3092\u3057\u307e\u3057\u3087\u3046\u3002
\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u9054\u4eba\u306b\u306a\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3082\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n5. \u914d\u5217\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\uff1a\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u30b3\u30c4<\/h2>\n\n\n\n
\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u6271\u3046\u5834\u5408\u3001Ruby\u306e\u914d\u5217\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u975e\u5e38\u306b\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002
\u3053\u306e\u7ae0\u3067\u306f\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3068\u51e6\u7406\u901f\u5ea6\u306e\u4e21\u9762\u304b\u3089\u3001\u914d\u5217\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b66\u3073\u307e\u3059\u3002<\/p>\n\n\n\n\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u914d\u5217\u64cd\u4f5c\uff1a\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n
1. \u9069\u5207\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u9078\u629e<\/h4>\n\n\n\n
\u914d\u5217\u306f\u9806\u5e8f\u4ed8\u3051\u3089\u308c\u305f\u30c7\u30fc\u30bf\u306e\u683c\u7d0d\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u983b\u7e41\u306b\u691c\u7d22\u3059\u308b\u5834\u5408\u306f\u30cf\u30c3\u30b7\u30e5\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
# \u914d\u5217\u3067\u306e\u691c\u7d22\uff08O(n)\u306e\u6642\u9593\u8a08\u7b97\u91cf\uff09\n large_array = (1..1000000).to_a\n target = 500000\n result = large_array.include?(target)\n\n # \u30cf\u30c3\u30b7\u30e5\u3067\u306e\u691c\u7d22\uff08O(1)\u306e\u6642\u9593\u8a08\u7b97\u91cf\uff09\n large_hash = (1..1000000).to_h { |n| [n, true] }\n result = large_hash.key?(target)<\/pre>\n\n\n\n2. \u30e1\u30e2\u30ea\u306e\u4e8b\u524d\u5272\u308a\u5f53\u3066<\/h4>\n\n\n\n
\u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u4e88\u3081\u308f\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u30e1\u30e2\u30ea\u3092\u4e8b\u524d\u306b\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# \u30e1\u30e2\u30ea\u306e\u4e8b\u524d\u5272\u308a\u5f53\u3066\u306a\u3057\n array = []\n 1000000.times { |i| array << i }\n\n # \u30e1\u30e2\u30ea\u306e\u4e8b\u524d\u5272\u308a\u5f53\u3066\u3042\u308a\n array = Array.new(1000000) { |i| i }<\/pre>\n\n\n\n3. \u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u524a\u9664<\/h4>\n\n\n\n
\u5927\u898f\u6a21\u306a\u914d\u5217\u3092\u6271\u3046\u969b\u306f\u3001\u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u3053\u307e\u3081\u306b\u524a\u9664\u3057\u3066\u30e1\u30e2\u30ea\u3092\u89e3\u653e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
large_array = (1..1000000).to_a\n result = large_array.select { |n| n % 2 == 0 }\n large_array = nil # \u4e0d\u8981\u306b\u306a\u3063\u305f\u5927\u304d\u306a\u914d\u5217\u3092\u89e3\u653e\n GC.start # \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u660e\u793a\u7684\u306b\u5b9f\u884c<\/pre>\n\n\n\n\u914d\u5217\u51e6\u7406\u306e\u901f\u5ea6\u5411\u4e0a\uff1a\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u4f7f\u3063\u305f\u6027\u80fd\u6bd4\u8f03<\/h3>\n\n\n\n
1. \u4e26\u5217\u51e6\u7406\u306e\u6d3b\u7528<\/h4>\n\n\n\n
\u30de\u30eb\u30c1\u30b3\u30a2\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u3001\u4e26\u5217\u51e6\u7406\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
require 'parallel'\n\n numbers = (1..1000000).to_a\n\n # \u901a\u5e38\u306e\u51e6\u7406\n sum = numbers.inject(0, :+)\n\n # \u4e26\u5217\u51e6\u7406\n sum = Parallel.reduce(numbers) { |sum, n| sum + n }<\/pre>\n\n\n\n2. \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u5c0e\u5165<\/h4>\n\n\n\n
\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u5ea6\u306b\u51e6\u7406\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u5c0f\u3055\u306a\u30d0\u30c3\u30c1\u306b\u5206\u3051\u3066\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u3064\u3064\u51e6\u7406\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
large_array = (1..1000000).to_a\n batch_size = 10000\n\n large_array.each_slice(batch_size) do |batch|\n # \u30d0\u30c3\u30c1\u5358\u4f4d\u3067\u51e6\u7406\u3092\u884c\u3046\n processed_batch = batch.map { |n| n * 2 }\n # \u51e6\u7406\u7d50\u679c\u3092\u4fdd\u5b58\u3059\u308b\u306a\u3069\u306e\u64cd\u4f5c\n end<\/pre>\n\n\n\n3. \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u4f7f\u3063\u305f\u6027\u80fd\u6bd4\u8f03<\/h4>\n\n\n\n
Ruby\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3042\u308b
Benchmark<\/code>\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u7570\u306a\u308b\u5b9f\u88c5\u65b9\u6cd5\u306e\u6027\u80fd\u3092\u6bd4\u8f03\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\nrequire 'benchmark'\n\n array = (1..100000).to_a\n\n Benchmark.bm do |x|\n x.report(\"Each:\") { array.each { |n| n * 2 } }\n x.report(\"Map:\") { array.map { |n| n * 2 } }\n x.report(\"Parallel:\") { Parallel.map(array) { |n| n * 2 } }\n end<\/pre>\n\n\n\n4. \u30d5\u30ea\u30fc\u30ba\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u7528<\/h4>\n\n\n\n
\u5909\u66f4\u3055\u308c\u306a\u3044\u6587\u5b57\u5217\u3084\u914d\u5217\u3092\u30d5\u30ea\u30fc\u30ba\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3057\u3001\u308f\u305a\u304b\u306a\u304c\u3089\u51e6\u7406\u901f\u5ea6\u3082\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
frozen_array = [1, 2, 3].freeze\n frozen_string = \"Hello, World!\".freeze<\/pre>\n\n\n\n<\/i><\/span>\u6f14\u7fd2\u554f\u984c<\/div><\/div>\n\n
- 1\u304b\u3089100\u4e07\u307e\u3067\u306e\u6570\u5b57\u306e\u914d\u5217\u3092\u751f\u6210\u3057\u3001\u305d\u306e\u4e2d\u304b\u3089\u7d20\u6570\u3092\u62bd\u51fa\u3059\u308b\u51e6\u7406\u3092\u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u901a\u5e38\u306e\u5b9f\u88c5\u3068\u4e26\u5217\u51e6\u7406\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u3092\u4f5c\u6210\u3057\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u4f7f\u3063\u3066\u6027\u80fd\u3092\u6bd4\u8f03\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- 10\u4e07\u500b\u306e\u6587\u5b57\u5217\u3092\u542b\u3080\u914d\u5217\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u914d\u5217\u5185\u306e\u5404\u6587\u5b57\u5217\u3092\u9006\u9806\u306b\u3059\u308b\u51e6\u7406\u3092\u3001\u901a\u5e38\u306e\u65b9\u6cd5\u3068\u30d0\u30c3\u30c1\u51e6\u7406\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5\u3067\u5b9f\u88c5\u3057\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u51e6\u7406\u6642\u9593\u3092\u6bd4\u8f03\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u5927\u898f\u6a21\u306a\u914d\u5217\uff08\u4f8b\uff1a100\u4e07\u8981\u7d20\uff09\u306b\u5bfe\u3057\u3066\u3001\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\u3092\u7e70\u308a\u8fd4\u3057\u884c\u3046\u51e6\u7406\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u51e6\u7406\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u30923\u3064\u63d0\u6848\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u5229\u70b9\u3068\u6b20\u70b9\u3092\u8aac\u660e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n