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#!/bin/bash
s='localhost,127.0.0.1,.myfancy.domain,.myotherfancy.domain'
sed 's/,\.\{0,1\}/|/g' <<< "$s"

Success #stdin #stdout 0.01s 5460KB

stdin

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Standard input is empty

stdout

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localhost|127.0.0.1|myfancy.domain|myotherfancy.domain

https://ideone.com/7lnEQh

language:

Bash (bash 5.0.3)

created:

visibility:

secret

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