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Shell Programming and Scripting

How to replace pattern

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# 8  
Old 05-14-2010
Quote:
Originally Posted by scottn
Code:
$ echo "this is test prtestad yes this is test" | sed "s/pr[^ ]*ad/prahlad/g"         
this is test prahlad yes this is test

Scottn,

Code:
 
echo "this is test rrprdddddad prtestad yes this is test" | sed 's/pr[^ ]*ad/prahlad/g'
this is test rrprahlad prahlad yes this is test

I would prefer to add spaces , like below so only the "Words" starting and ending with the pr and ad will be modified

Code:
 
echo "this is test rrprdddddad prdsdjsnadjjdsn prtestad yes this is test" | sed -e 's/ pr[^ ]*ad$/ prahlad/g'  -e 's/^pr[^ ]*ad /prahlad /g' -e 's/ pr[^ ]*ad / prahlad /g'
this is test rrprdddddad prdsdjsnadjjdsn prahlad yes this is test

# 9  
Old 05-14-2010
Quote:
Originally Posted by pseudocoder
Still doesn't work for me...
Code:
$ echo "this is test prtestad yes this is test" | sed 's/\<pr.*ad\>/prahlad/'
this is test prtestad yes this is test
$

Code:
$ echo "this is test prtestad yes this is test" | sed 's/\<pr....ad\>/prahlad/'
this is test prtestad yes this is test
$

Maybe it expects the GNU version of sed Smilie
Which version your sed ? v.4.x?
# 10  
Old 05-14-2010
All right, I launched DSL (damn small linux) as Qemu guest and run the GNU version of sed (v4.0) and it worked.
So next time I will check that before I report a non-working sed command Smilie
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