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lodash源码分析之takeRightWhile #95

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HeftyKoo opened this issue Feb 27, 2020 · 0 comments
Open

lodash源码分析之takeRightWhile #95

HeftyKoo opened this issue Feb 27, 2020 · 0 comments
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api 暴露出来的接口 系列文章

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@HeftyKoo
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本文为读 lodash 源码的第九十四篇,后续文章会更新到这个仓库中,欢迎 star:pocket-lodash

gitbook也会同步仓库的更新,gitbook地址:pocket-lodash

依赖

import baseWhile from './.internal/baseWhile.js'

《lodash源码分析之baseWhile》

源码分析

takeRightWhile 的作用和 takeRight 差不多,但是不是直接传入数量 n,而是传入一个预测函数 predicate,只有在预测函数返回真值时才会从数组中将元素取出,和 takeRight 一样,takeRightWhile 也是从后向前取值的。

源码如下:

function takeRightWhile(array, predicate) {
  return (array != null && array.length)
    ? baseWhile(array, predicate, false, true)
    : []
}

可以看到,takeRightWhile 其实就是直接调用 baseWhile 来实现的,注意传入的第四个参数 fromRighttrue ,表示从后向前取值。

License

署名-非商业性使用-禁止演绎 4.0 国际 (CC BY-NC-ND 4.0)

最后,所有文章都会同步发送到微信公众号上,欢迎关注,欢迎提意见:

作者:对角另一面

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