tldr/pages/common/ack.md

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# ack
> A search tool like grep, optimized for programmers.
> More information: <https://beyondgrep.com/documentation/>.
- Find files containing "foo":
`ack {{foo}}`
- Find files of a specific type:
`ack --ruby {{foo}}`
- Count the total number of matches for the term "foo":
`ack -ch {{foo}}`
- Show the file names containing "foo" and number of matches in each file:
`ack -cl {{foo}}`
- Search a file for a specified string:
`ack bar "{{foo bar}}" {{path/to/file}}`
- Search a file for the specified regex pattern:
`ack bar "{{[bB]ar \d+}}" {{path/to/file}}`
- List all valid types:
`ack --help-types`