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Old 10-29-2013, 02:49 PM   #1
waddles
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Registered: Sep 2012
Posts: 373

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Problem with space padding


I "thought" this was how to pad spaces in front of a line:
spaces=" "
pdl=12
pad=`echo "$spaces" | cut -c $pdl`
echo "B${pad}E"
but I get:
B E
I've tried with a constant instead of "$pdl" and get the same thing.
I "THINK" I have used this before but I am not able to get the proper pad length created. Use of printf had similar problems. Does anyone see my mistake. I would like to find a correction rather than an alternate padding solution since I feel certain I've used this before.
Thanks
 
Old 10-29-2013, 03:18 PM   #2
Firerat
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Registered: Oct 2008
Distribution: Debian Jessie / sid
Posts: 1,331

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use printf

Code:
printf "B%12sE\n"
or for more fun
Code:
printf "%*s%*s%s\n" $(( ${COLUMNS} / 2 )) "B" $((12+1)) "E"
centre(ish)
Code:
Centre="This is in centre"
printf "%*s\n" $(( (${COLUMNS}+${#Centre}) / 2 )) "$Centre"
 
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