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本文为读 lodash 源码的第二百五十三篇,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
import isSymbol from '../isSymbol.js'
《lodash源码分析之isSymbol》
baseToString 的逻辑作为一个内部函数,作用和 toString 基本一样,之所以不直接使用 toString ,和 baseToNumber 一样,都基于同样的理由,出于性能的考虑。
baseToString
toString
baseToNumber
源码如下:
const INFINITY = 1 / 0 const symbolToString = Symbol.prototype.toString function baseToString(value) { if (typeof value === 'string') { return value } if (Array.isArray(value)) { return `${value.map(baseToString)}` } if (isSymbol(value)) { return symbolToString ? symbolToString.call(value) : '' } const result = `${value}` return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result }
源码基本和 toString 一致,但是不会处理 null 和 undefined 。
null
undefined
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
The text was updated successfully, but these errors were encountered:
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本文为读 lodash 源码的第二百五十三篇,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
《lodash源码分析之isSymbol》
源码分析
baseToString
的逻辑作为一个内部函数,作用和toString
基本一样,之所以不直接使用toString
,和baseToNumber
一样,都基于同样的理由,出于性能的考虑。源码如下:
源码基本和
toString
一致,但是不会处理null
和undefined
。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
The text was updated successfully, but these errors were encountered: