ruby 注入与减少红宝石相同吗？

Is inject the same thing as reduce in ruby?

提问by Hymany

I saw that they were documented together here. Are they the same thing? Why does Ruby have so many aliases (such as map/collect for arrays)? Thanks a lot.

我看到它们被一起记录在这里。它们是一样的吗？为什么 Ruby 有这么多别名（比如数组的 map/collect）？非常感谢。

回答by Zach

Yes, and it's also called foldin many other programming languages and in Mathematics. Ruby aliases a lot in order to be intuitive to programmers with different backgrounds. If you want to use #lengthon an Array, you can. If you want to use #size, that's fine too!

是的，它fold在许多其他编程语言和数学中也被调用。Ruby 别名很多，以便对不同背景的程序员直观。如果你想在#length上使用Array，你可以。如果你想使用#size，那也没关系！

回答by axiac

More recent versions of the documentation of Enumerable#reducespecify it explicitly:

文档的更新版本Enumerable#reduce明确指定它：

The injectand reducemethods are aliases. There is no performance benefit to either.

该inject和reduce方法是别名。两者都没有性能优势。