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underscoreのeachでbreakできないならeveryを使おう

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underscore.jsのeachを使っているとき、下記のようにしてもループは途中で終わりません。

_.each([1,2,3,4,5,6], function (elem) {
  console.log(elem)
  return false
})

http://underscorejs.org/#each

出力
1
2
3
4
5
6

_.everyを使う

_.every([1,2,3,4,5,6], function (elem) {
  console.log(elem)
  return false
})
出力
1

http://underscorejs.org/#every

Returns true if all of the values in the list pass the predicate truth test. Short-circuits and stops traversing the list if a false element is found.

デバッグなどでループを全部回したくない場合は_.everyを使うと便利かもしれません。

以上です。

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https://lifull.com/
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