Last Updated: January 23, 2019
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8.398K
· nvie

map function in shell

The following defines an intuitive "map" function for use in shell scripts or on the command line:

$ alias map="xargs -n1"

This takes a command which will be invoked on every line from stdin. A useful example: finding all directories that contain a certain file:

$ find * -name models.py | map dirname
core
events
teams
vault

3 Responses
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Erm... use a wildcard in the path argument of find?

over 1 year ago ·

@avdleeuw In this case, I don't want the ./ prefixes on the output, so yes. I wouldn't use them in an uncontrolled environment :)

over 1 year ago ·

If you like map, have a look at GNU Parallel https://www.youtube.com/playlist?list=PL284C9FF2488BC6D1

over 1 year ago ·