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lodash源码分析之hasIn #292

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HeftyKoo opened this issue May 17, 2020 · 0 comments
Open

lodash源码分析之hasIn #292

HeftyKoo opened this issue May 17, 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 源码的第二百九十一篇,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

源码分析

hasIn 用来判断 object 自身及原型链所有的可枚举属性里是否存在 key

源码如下:

function hasIn(object, key) {
  return object != null && key in Object(object)
}

其实就是使用 in 操作符来检测。

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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