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lodash源码分析之getMatchData #227

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HeftyKoo opened this issue May 2, 2020 · 0 comments
Open

lodash源码分析之getMatchData #227

HeftyKoo opened this issue May 2, 2020 · 0 comments
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internal 内部函数或方法 系列文章

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@HeftyKoo
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HeftyKoo commented May 2, 2020

本文为读 lodash 源码的第二百二十六篇,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 isStrictComparable from './isStrictComparable.js'
import keys from '../keys.js'

《lodash源码分析之isStrictComparable》
《lodash源码分析之keys》

源码分析

getMatchData 是一个内部辅助函数,用来将对象的键值和是否使用 === 比较的标记转换成一个数组。

源码如下:

function getMatchData(object) {
  const result = keys(object)
  let length = result.length

  while (length--) {
    const key = result[length]
    const value = object[key]
    result[length] = [key, value, isStrictComparable(value)]
  }
  return result
}

先用 keys 取出对象 object 自身可枚举的非 Symbol 类型的属性。

然后遍历属性,取出 object 对应属性 key 的值,并且计算 value 是否可以使用 === 比较的标记,组成 [key, value, flag] 形式的数组,存入 result 中。

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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