"foo" 和 "bar" 是什么意思，为什么人们喜欢用它们作为示例？
what does "foo" and "bar" mean and why people like use them as example case?
在很多程序测试用例或示例用例中，我总是看到"bar"和"foo"，这两个词代表什么，为什么选择这两个词作为示例？
Google 比我更能回答你的问题。来自wiki:
The word foo originated as a nonsense word from the 1930s, the military term FUBAR emerged in the 1940s, and the use of foo in a programming context is generally credited to the Tech Model Railroad Club (TMRC) of MIT from circa 1960.[9] However, the precise relationship of these terms is not known with certainty, and several anecdotal theories have been advanced to identify them.
另外，看看这个问题：What is the origin of foo and bar? as well as this one: https://softwareengineering.stackexchange.com/questions/69788/what-is-the-history-of-the-use-of-foo-and-bar-in-source-code-examples
在很多程序测试用例或示例用例中，我总是看到"bar"和"foo"，这两个词代表什么，为什么选择这两个词作为示例？
Google 比我更能回答你的问题。来自wiki:
The word foo originated as a nonsense word from the 1930s, the military term FUBAR emerged in the 1940s, and the use of foo in a programming context is generally credited to the Tech Model Railroad Club (TMRC) of MIT from circa 1960.[9] However, the precise relationship of these terms is not known with certainty, and several anecdotal theories have been advanced to identify them.
另外，看看这个问题：What is the origin of foo and bar? as well as this one: https://softwareengineering.stackexchange.com/questions/69788/what-is-the-history-of-the-use-of-foo-and-bar-in-source-code-examples