leading zeros in bash scripts
July 18th, 2011
3 comments
I have a bash script that generates names for binaries, these names include parameters ranging from 2 to 64. I sort these then but due to the nature of alphanumeric sorting, 4 is sorted between 32 and 64 (4 is bigger than 3 but smaller than 6…). So what i need is leading zeros for the sorting to work the way i want it to work. The easiest solution i could come up with is padding zeros c-style using the command line version of printf:
PARAMLIST="2 4 8 16 24 32 40 48 56 64" for PARAM in $PARAMLIST; do printf "%02d\n" $PARAM done |
[update by bert]
sort –numeric-sort |
solves the sorting issue as well 🙂
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