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本文为读 lodash 源码的第三十七篇,后续文章会更新到这个仓库中,欢迎 star:pocket-lodashgitbook也会同步仓库的更新,gitbook地址:pocket-lodash
head 和 last 刚好相反,获取的是数组第一项。
head
last
其实如果知道输入项一定是数组,直接使用 array[0] 来获取也很简单,head 方法主要做了一些非空的判断操作。
array[0]
function head(array) { return (array != null && array.length) ? array[0] : undefined }
last 的源码分析如下:
lodash源码分析之last
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 源码的第三十七篇,后续文章会更新到这个仓库中,欢迎 star:pocket-lodashgitbook也会同步仓库的更新,gitbook地址:pocket-lodash
源码分析
head
和last
刚好相反,获取的是数组第一项。其实如果知道输入项一定是数组,直接使用
array[0]
来获取也很简单,head
方法主要做了一些非空的判断操作。last
的源码分析如下:lodash源码分析之last
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: