{"id":4837,"date":"2013-11-24T02:31:18","date_gmt":"2013-11-23T17:31:18","guid":{"rendered":"http:\/\/www.webcyou.com\/?p=4837"},"modified":"2013-11-24T17:02:26","modified_gmt":"2013-11-24T08:02:26","slug":"%e3%80%90js%e3%80%91%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91underscore-js-%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-%e3%81%be%e3%81%a8%e3%82%81-array-functions","status":"publish","type":"post","link":"https:\/\/www.webcyou.com\/?p=4837","title":{"rendered":"\u3010JS\u3011\u3010\u4fdd\u5b58\u7248\u3011underscore.js \u306e\u4f7f\u7528\u65b9\u6cd5 \u307e\u3068\u3081 Array Functions"},"content":{"rendered":"

\"\"<\/a><\/p>\n

underscore.js<\/strong><\/h4>\n

\u5f15\u304d\u7d9a\u304d\u3001underscore.js \u306eArray Functions\u306e\u307e\u3068\u3081\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

 <\/p>\n

Array Functions<\/h4>\n

first<\/h5>\n

_.first(array, [n])<\/p>\n

\u30ea\u30b9\u30c8\u306e\u6700\u521d\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n

_.first([5, 4, 3, 2, 1]);<\/p>\n

=> 5<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n  var list = [\"web\u5e33\", 3, 5, 6, 2];\r\n  var x = _.first(list);\r\n  console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
initial<\/h5>\n
_.initial(array, [n])<\/p>\n
\u914d\u5217\u306e\u6700\u5f8c\u306e\u8981\u7d20\u4ee5\u5916\u306e\u3059\u3079\u3066\u3092\u8fd4\u3057\u307e\u3059<\/p>\n
_.initial([5, 4, 3, 2, 1]);\r\n=> [5, 4, 3, 2]<\/pre>\n
(function() {\r\n  var list = [7, 3, 5, 6, \"web\u5e33\"];\r\n  var x = _.initial(list);\r\n  console.log(x);\r\n})();<\/pre>\n
\u00a0\"\"<\/a><\/p>\n
last<\/h5>\n
_.last(array, [n])<\/p>\n
\u914d\u5217\u00a0\u306e\u6700\u5f8c\u306e\u8981\u7d20\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.last([5, 4, 3, 2, 1]);<\/p>\n
=> 1<\/pre>\n
 <\/p>\n
rest<\/h5>\n
_.rest(array, [index])<\/p>\n
\u914d\u5217\u306e\u4e2d\u306e\u8981\u7d20\u306e\u6b8b\u308a(rest)\u00a0\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.rest([5, 4, 3, 2, 1]);\r\n=> [4, 3, 2, 1]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n  var a = [5, 4, 3, 2, 1];\r\n  var x = _.rest(a, 2)\r\n  console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
compact<\/h5>\n
_.compact(array)<\/p>\n
false, null, 0, “”, undefined\u3092\u53d6\u308a\u9664\u3044\u305f\u914d\u5217\u3092\u8fd4\u3059\u3002<\/p>\n
_.compact([0, 1, false, 2, ”, 3]);<\/span><\/p>\n
=> [1, 2, 3]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = ['web\u5e33', 1, 'false', null, '', 3, false];\r\n var x = _.compact(a);\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
flatten<\/h5>\n
_.flatten(array, [shallow])<\/p>\n
\u591a\u6b21\u5143\u914d\u5217\u3092\u4e00\u6b21\u5143\u5316\u3059\u308b\u3002<\/p>\n
_.flatten([1, [2], [3, [[4]]]]);\r\n=> [1, 2, 3, 4];\r\n\r\n_.flatten([1, [2], [3, [[4]]]], true);\r\n=> [1, 2, 3, [[4]]];<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n  var a = [1, [2], [3, [[{\"name\": \"hoge\"},{\"name\": \"web\u5e33\"}]]]];\r\n  var x = _.flatten(a);\r\n  console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
without<\/h5>\n
_.without(array, [*values])<\/p>\n
values\u3092\u53d6\u308a\u9664\u3044\u305f\u914d\u5217\u3092\u8fd4\u3059\u3002===\u6f14\u7b97\u5b50\u3067\u6bd4\u8f03\u3055\u308c\u308b\u3002<\/p>\n
_.without([1, 2, 1, 0, 3, 1, 4], 0, 1);\r\n=> [2, 3, 4]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [\"web\", 2, \"web\u5e33\", 0, 3, 1, 3];\r\n var x = _.without(a, 0, \"web\", \"3\");\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
union<\/h5>\n
_.union(*arrays)<\/p>\n
arrays\u00a0\u306e\u548c\u96c6\u5408 (arrays\u00a0\u306e\u3069\u308c\u304b\u304b\u8907\u6570\u3067\u73fe\u308c\u308b\u9805\u76ee\u30921\u56de\u3060\u3051\u9806\u306b\u3068\u3063\u305f\u30ea\u30b9\u30c8)\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n
_.union([1, 2, 3], [101, 2, 1, 10], [2, 1]);\r\n=> [1, 2, 3, 101, 10]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\nvar x = _.union([1, 2, \"web\"], [101, 2, 1, 10], [\"web\u5e33\", 1, \"web\u5e33\", \"web\u5e33\"]);\r\n    console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
intersection<\/h5>\n
_.intersection(*arrays)<\/p>\n
\u914d\u5217\u306e\u3059\u3079\u3066\u306e\u7a4d\u96c6\u5408\uff08\u91cd\u306a\u308b\u5024\uff09\u3068\u306a\u308b\u5024\u306e\u30ea\u30b9\u30c8\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n
\u7d50\u679c\u306e\u4e2d\u306e\u305d\u308c\u305e\u308c\u306e\u5024\u306f\u305d\u308c\u305e\u308c\u306e\u914d\u5217\u306b\u73fe\u308c\u307e\u3059\u3002<\/p>\n
_.intersection([1, 2, 3], [101, 2, 1, 10], [2, 1]);\r\n=> [1, 2]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [3, 1, \"web\u5e33\"],\r\n     b = [1, 2, 4, 3, \"web\u5e33\"],\r\n     c = [\"web\u5e33\", 1, 2, 3, 4, 10];\r\n var x = _.intersection(a, b, c);\r\n     console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
difference<\/h5>\n
_.difference(array, *others)<\/p>\n
without\u00a0\u306b\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u914d\u5217\u306e\u4e2d\u304b\u3089 other\u306b\u5b58\u5728\u3057\u306a\u3044\u5024\u306e\u30ea\u30b9\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.difference([1, 2, 3, 4, 5], [5, 2, 10]);\r\n=> [1, 3, 4]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n  var a = [3, 1, 5, \"web\u5e33\"],\r\n  b = [1, 2, 4, 3];\r\n  var x = _.difference(a, b);\r\n  console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
uniq<\/h5>\n
_.uniq(array, [isSorted], [iterator])<\/p>\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540c\u7b49\u6027\u3092\u30c6\u30b9\u30c8\u3059\u308b\u306e\u306b\u00a0===<\/em>\u00a0\u3092\u4f7f\u3063\u3066\u3001\u914d\u5217\u306e\u91cd\u8907\u306a\u3057\u7248\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.uniq([1, 2, 1, 3, 1, 4]);\r\n=> [1, 2, 3, 4]<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n  var a = [1, 2, 1, 3, 1, \"web\u5e33\", 4, \"web\", 4, \"web\u5e33\"];\r\n  var x = _.uniq(a);\r\n  console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
zip<\/h5>\n
_.zip(*arrays)<\/p>\n
\u914d\u5217\u306e\u305d\u308c\u305e\u308c\u306e\u4e2d\u306e\u5024\u3092\u3001\u5bfe\u5fdc\u3059\u308b\u4f4d\u7f6e\u306b\u5024\u304c\u6765\u308b\u3088\u3046\u306b\u4e00\u7dd2\u306b\u7d50\u5408\u3057\u307e\u3059\u3002<\/p>\n
_.zip([‘moe’, ‘larry’, ‘curly’], [30, 40, 50], [true, false, false]);<\/span><\/p>\n
=> [[\"moe\", 30, true], [\"larry\", 40, false], [\"curly\", 50, false]]\r\n\r\n_.zip.apply(_, arrayOfRowsOfData);\r\n=> arrayOfColumnsOfData<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [\"web\u5e33\", \"web\u5e33\u3092\", \"\u6c17\u306b\u306a\u308b\"],\r\n     b = [\"\u7d20\u6575\", \"\u6bce\u65e5\", \"url\u306f\"],\r\n     c = [\"\u3044\u3084\u3093\", \"\u898b\u3066\u308b\", \"https:\/\/www.webcyou.com\/\"];\r\n     var x = _.zip(a, b, c);\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
object<\/h5>\n
_.object(list, [values])<\/p>\n
\u914d\u5217\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3057\u307e\u3059\u3002
\n\u3069\u3061\u3089\u304b\u3092\u901a\u308b\u3001\u5358\u4e00\u306e\u30ea\u30b9\u30c8\u3001\u306e[\u30ad\u30fc\u3001\u5024]\u30da\u30a2\u3001\u3042\u308b\u3044\u306f\u30ad\u30fc\u306e\u30ea\u30b9\u30c8\u304a\u3088\u3073\u5024\u306e\u30ea\u30b9\u30c8\u3002
\n\u540c\u3058\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u3001\u6700\u7d42\u306e\u5024\u304c\u512a\u5148\u3002<\/p>\n
_.object(['moe', 'larry', 'curly'], [30, 40, 50]);\r\n=> {moe: 30, larry: 40, curly: 50}\r\n\r\n_.object([['moe', 30], ['larry', 40], ['curly', 50]]);\r\n=> {moe: 30, larry: 40, curly: 50}<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [\"web\u5e33\", \"\u3060\u3081\"],\r\n     b = [\"\u305d\u3052\u3093\u3053\u3068\u3044\u3046\u3066\u3082\", \"\u308f\u304b\u3089\u3093\u3068\"],\r\n     c = [\"web\u5e33\", \"\u826f\u3044\uff01\"];\r\n var x = _.object([a, b, c]);\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
indexOf<\/h5>\n
_.indexOf(array, value, [isSorted])\u00a0
\nvalue<\/strong>\u00a0\u304c\u00a0array<\/strong>\u00a0\u306e\u4e2d\u3067\u898b\u3064\u304b\u3063\u305f\u5834\u6240\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304b\u3001array<\/strong>\u00a0\u306e\u4e2d\u306b\u73fe\u308c\u306a\u304b\u3063\u305f\u3089-1<\/em>\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.indexOf([1, 2, 3], 2);\r\n=> 1<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [\"web\u5e33\", \"html5\", \"javascript\"];\r\n var x = _.indexOf(a, \"web\");\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
lastIndexOf<\/h5>\n
_.lastIndexOf(array, value, [fromIndex])<\/p>\n
array<\/strong>\u00a0\u306e\u4e2d\u3067\u00a0value<\/strong>\u00a0\u304c\u6700\u5f8c\u306b\u73fe\u308c\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304b\u3001\u3082\u3057\u306a\u3051\u308c\u3070\u00a0\u00a0-1<\/em>\u00a0\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.lastIndexOf([1, 2, 3, 1, 2, 3], 2);\r\n=> 4<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [1, 2, 3, 1, 2, \"web\u5c4b\"];\r\n var x = _.lastIndexOf(a, \"web\u5e33\");\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
 <\/p>\n
sortedIndex<\/h5>\n
_.sortedIndex(list, value, [iterator], [context])<\/p>\n
\u5024\u304c\u30ea\u30b9\u30c8\u306e\u30bd\u30fc\u30c8\u3055\u308c\u305f\u79e9\u5e8f\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u30ea\u30b9\u30c8\u3078\u633f\u5165\u3055\u308c\u308b\u3079\u304d\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6c7a\u5b9a\u3059\u308b\u305f\u3081\u306b\u4e8c\u5206\u63a2\u7d22\u6cd5\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
_.sortedIndex([10, 20, 30, 40, 50], 35);\r\n=> 3\r\n\r\nvar stooges = [{name: 'moe', age: 40}, {name: 'curly', age: 60}];\r\n_.sortedIndex(stooges, {name: 'larry', age: 50}, 'age');\r\n=> 1<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n var a = [{title: 'js\u306e\u8a18\u4e8b', page: 23}, {title: 'html\u306e\u8a18\u4e8b', page: 25}];\r\n var x = _.sortedIndex(a, {title: 'css\u306e\u8a18\u4e8b', page: 40}, 'page');\r\n console.log(x);\r\n})();<\/pre>\n
\"\"<\/a><\/p>\n
range<\/h5>\n
_.range([start], stop, [step])<\/p>\n
each\u3084map\u30eb\u30fc\u30d7\u306b\u91cd\u5b9d\u3059\u308b\u67d4\u8edf\u306b\u756a\u53f7\u4ed8\u3051\u3089\u308c\u305f\u6574\u6570\u30ea\u30b9\u30c8\u3092\u751f\u6210\u3059\u308b\u95a2\u6570\u3002<\/p>\n
start<\/strong>\u306f\u7701\u7565\u3055\u308c\u305f\u3089\u30c7\u30d5\u30a9\u30eb\u30c8\u306f0\u3002step<\/strong>\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306f1\u3002<\/p>\n
start<\/strong>\u304b\u3089stop<\/strong>\u307e\u3067step<\/strong>\u305a\u3064\u5897\u5206(\u6e1b\u5206)\u3055\u308c\u308b\u6574\u6570\u306e\u30ea\u30b9\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
_.range(10);\r\n=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\r\n_.range(1, 11);\r\n=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\r\n_.range(0, 30, 5);\r\n=> [0, 5, 10, 15, 20, 25]\r\n_.range(0, -10, -1);\r\n=> [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]\r\n_.range(0);\r\n=> []<\/pre>\n
example<\/strong><\/p>\n
(function() {\r\n  var x = _.range(10, -40, -5);\r\n console.log(x);\r\n})();<\/pre>\n
 <\/p>\n
\"\"<\/a><\/p>\n
\u3068\u3001\u4fbf\u5229\u306a\u6a5f\u80fd\u304c\u305f\u304f\u3055\u3093\uff01\uff01\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
underscore.js \u5f15\u304d\u7d9a\u304d\u3001underscore.js \u306eArray Functions\u306e\u307e\u3068\u3081\u3068\u306a\u308a\u307e\u3059\u3002   Array Functions first _.first(array, [n]) \u30ea […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[168,176,166,37,47,179,50,46,178,138,78,114,118],"class_list":["post-4837","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-html","tag-html5","tag-iphone","tag-iphone-","tag-javascript-2","tag-jquery","tag-jquery-mobile","tag-js","tag-178","tag-138","tag-78","tag-114","tag-118"],"_links":{"self":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/4837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4837"}],"version-history":[{"count":7,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/4837\/revisions"}],"predecessor-version":[{"id":4866,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/4837\/revisions\/4866"}],"wp:attachment":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}