foo =文件或对象。它用来代替对象变量或文件名。

法语“fou”(比如:amour fou) [crazy]用英语写，应该是“foo”，对吧?否则furchtbar -> foobar -> foo, bar -> barfoo -> barfuß(赤脚)。傻人。没有牙齿的脚。

我同意所有提到它的人，它的意思是:没什么有趣的，只是一些东西，通常需要完成一个语句/表达式。

参见RFC 3092:“Foo”的词源，D. Eastlake 3rd等。

为简洁起见，只引用RFC中的相关定义:

通常用作任何事物的示例名称，尤指 程序和文件(特别是草稿文件)。

中使用的元异步变量的标准列表中的第一个 语法示例(bar, baz, qux, quux, corge, grault, garply， 沃尔多，弗雷德，噗，xyzzy，砰)。(术语)

它是一个元异步变量。

我觉得这意味着什么都没有。维基上说:

Foo通常与元异步变量bar和foobar一起使用。

In my opinion every programmer has his or her own "words" that is used every time you need an arbitrary word when programming. For some people it's the first words from a childs song, for other it's names and for other its something completely different. Now for the programmer community there are these "words" as well, and these words are 'foo' and 'bar'. The use of this is that if you have to communicate publicly about programming you don't have to say that you would use arbitratry words, you would simply write 'foo' or 'bar' and every programmer knows that this is just arbitrary words.