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# ack
> 一个类似grep的搜索工具，为程序员优化.
- 寻找包含"foo"的文件:
`ack {{foo}}`
- 在给定的语言中寻找文件:
`ack --ruby {{each_with_object}}`
- 计算匹配到"foo"的总次数:
`ack -ch {{foo}}`
- 列出内容包含"foo"的文件的文件名,并显示在每个文件中匹配的次数:
`ack -cl {{foo}}`