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[Solved] Count characters of variable from right

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Top Forums Shell Programming and Scripting [Solved] Count characters of variable from right
# 1  
Old 02-21-2014
[Solved] Count characters of variable from right
My variable is something like:

Code:
f="/Volumes/VERVE/MOOTON_CALL/01_shots/XX/xx0195/Projects/program/rs0195_v400001.aep"

I use ${f:63:6} to call "rs0195" as characters counted from the left, but it'd be so much easier to count from the right.

If ${f:95:10} counts from the left, what would count from the right?

Thanks
Last edited by Scott; 02-21-2014 at 01:40 PM.. Reason: Please use code tags
# 2  
Old 02-21-2014
Given the length of f (${#f}), you can count back from the right:
Code:
$ echo ${f:${#f}-18:6}
rs0195

This User Gave Thanks to Scott For This Post:
wisecracker
# 3  
Old 02-21-2014
That's it! Thanks!
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