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lodash源码分析之charsStartIndex #338

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HeftyKoo opened this issue May 30, 2020 · 0 comments
Open

lodash源码分析之charsStartIndex #338

HeftyKoo opened this issue May 30, 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 30, 2020

本文为读 lodash 源码的第三百三十七篇,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 baseIndexOf from './baseIndexOf.js'

《lodash源码分析之baseIndexOf》

源码分析

chartsStartIndex 的作用的找出 strSymbols字符串 数组中第一个不在 chrSymbols 字符串数组中出现的字符的位置。

源码如下:

function charsStartIndex(strSymbols, chrSymbols) {
  let index = -1
  const length = strSymbols.length

  while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  return index
}

charEndIndex 的逻辑基本一致,但是是从前向后遍历。

参考:《lodash源码分析之charsEndIndex》

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

@HeftyKoo HeftyKoo added 系列文章 internal 内部函数或方法 labels May 30, 2020
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