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Last Updated: February 25, 2016
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5.279K
· 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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2173

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

over 1 year ago ·
2175

@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 ·
2262

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

over 1 year ago ·