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How i can add via preg replace dot after numbers ?

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# 1  
Old 03-11-2017
How i can add via preg replace dot after numbers ?
So lets say i have file my_birthday.402.zip ho it can became my_birthday.4.0.2.zip

Thank you Smilie
# 2  
Old 03-11-2017
The expensive way, easy to remember using GNU sed:
Code:
sed 's/[0-9]\B/&./g'

Code:
var=my_birthday.402.zip
echo "$var" | sed 's/[0-9]\B/&./g'





--
or using shell grammar, complicated but more efficient, if it is always 3 digits:
Code:
var=my_birthday.402.zip
tmpvar=${var%[0-9]*}
echo "${var%[0-9][0-9]*}.${tmpvar#"${var%[0-9][0-9]*}"}.${var#*[0-9][0-9]}"

Last edited by Scrutinizer; 03-11-2017 at 05:37 AM..
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