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How to change a segment in a particular position

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Top Forums Shell Programming and Scripting How to change a segment in a particular position
# 8  
Old 07-21-2009
Code:
my $str='XYZ*004567472*0099*020091231*0123*0.12';
$str=~s/(?<=[*])0+(?=(?:[^0*]*$)|(?:[^0*]*[*][^*]*$))//g;
print $str;

# 9  
Old 07-21-2009
Code:
xx='XYZ*04567472*0099*020091231*0123*0.12'

This works:
Code:
echo $xx | sed 's/\*00*/\*/5; s/\*00*/\*/4;'

But this does not:
Code:
echo $xx | sed 's/\*00*/\*/4; s/\*00*/\*/5;'

I have switched the 4 and 5.

---------- Post updated at 12:07 PM ---------- Previous update was at 10:32 AM ----------
Quote:
Originally Posted by cjcox
Code:
sed 's/^\([^*][^*]*[*][^*][^*]*[*][^*][^*]*[*][^*][^*]*\)[*]00*\([^*][^*]*\)[*]00*\(\..*\)/\1*\2*\3/'

I think that should work with most any sed variant.
Very nice. But, can be shortened to this:
Code:
echo $xx | sed 's~^\([^*]*\*[^*]*\*[^*]*\*[^*]*\*\)0*\([^*]*\*\)0*~\1\2~'

# 10  
Old 07-21-2009
Thanks everyone. Really amazing, how many different ways there are to solve the same issue.
# 11  
Old 07-21-2009
I'm sure there's a hundred more.

Do yourself a favour... pick a solution you understand and, if you're new to scripting don't go for the "one-liner", which people seem to love asking for.. because you a) probably won't understand it; and b) will certainly never remember it!
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