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Match only first occurrence of digit

Marko Published at Dev
12
Marko

After few hours of disappointed searching I can't figure this out.

I am piping to grep input, what I want to get is first occurrence of any digit.

Example:

nmcli --version
nmcli tool, version 1.1.93

Pipe to grep with regex

nmcli --version |grep -o '[[:digit:]]'

Output:

1
1
9
3

What I want:

1

Yeah there is a way to do that with another pipe, but is there "pure" single regex to do that?

Cyrus

With GNU grep:

nmcli --version | grep -Po ' \K[[:digit:]]'

Output:

1

See: Support of \K in regex

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