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trimming white spaces

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# 1  
Old 09-15-2006
trimming white spaces
I have a variable that calls in a string from txt file. Problem is the string comes with an abundance of white spaces trailing it. Is there any easy way to trim the tailing white spaces off at the end? Thanks in advance.
# 2  
Old 09-15-2006
Code:
#!/bin/ksh

a='foo  '
echo "Before->[${a}]"
a="${a%% *}"
echo "After->[${a}]"

# 3  
Old 09-15-2006
Thanks for quick response! When I do this I get a bad substitution error... do I need to put the % or the *? What is their function?
# 4  
Old 09-15-2006
alternatively in Python
Code:
#!/usr/bin/python

for lines in open("txtfile.txt"):
     lines = lines.strip() 
     print lines

# 5  
Old 09-15-2006
Quote:
Originally Posted by briskbaby
Thanks for quick response! When I do this I get a bad substitution error... do I need to put the % or the *? What is their function?
make sure you're in 'ksh' - '#!/bin/ksh'
or:
Code:
#!/bin/sh
a='fooo   '
echo "Before->[${a}]"
a=`echo "${a}" | sed 's/ *$//'`
echo "After->[${a}]"

# 6  
Old 09-15-2006
Thanks! I understand now.. but i run into a problem, let's say my variable stores the following:

a='I like foo '

I would need something where the white space after foo disappears - is this doable?
# 7  
Old 09-15-2006
Nevermind! It works! Thanks guys. You rock!
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