bash 字符串相等
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bash string equality
提问by brianegge
In bash, what's the difference, if any, between the equal and double equal test operators?
在 中bash，相等和双相等测试运算符之间有什么区别（如果有）？
[[ "a" = "a" ]] && echo equal || echo not-equal
[[ "a" == "a" ]] && echo equal || echo not-equal
[[ "a" = "b" ]] && echo equal || echo not-equal
[[ "a" == "b" ]] && echo equal || echo not-equal
results in:
结果是：
equal
equal
not-equal
not-equal
采纳答案by schnaader
There's no difference, ==is a synonym for =(for the C/C++ people, I assume). See here, for example.
没有区别，==是=（对于 C/C++ 人，我假设）的同义词。例如，请参见此处。
You could double-check just to be reallysure or just for your interest by looking at the bash source code, should be somewhere in the parsing code there, but I couldn't find it straightaway.
你可以仔细检查只是要真正确保或只是通过看你的兴趣bash的源代码，应该是某处解析代码，但我不能直截了当找到它。
