replacing text????

jagans · #1 (**permalink**) 02-10-06, 05:13

hi all..
i want to replace some texts from a string
4eg
$str='this is my test document and was created in perl and it is very goodis"
out of this string i want to replace all 'is' and 'was' with 'are' how i wil do it
rem ny string contains substrings eg (is in 'goodis' Ii don't want to replace it
pls help me
thnks in advance
jag

KevinADC · #2 (**permalink**) 02-10-06, 13:33

use the word boundary operator \b

Code:

my $str = 'this is my test document and was created in perl and it is very goodis';
$str =~ s/\bis|was\b/are/ig;
print $str;

or you could try and use spaces:

Code:

my $str = 'this is my test document and was created in perl and it is very goodis';
$str =~ s/\sis|was\s/are/ig;
print $str;

but the \b operator is generally used for this type of substitution. Any regexp resource or tutorial should have it listed.

hyperbole · #3 (**permalink**) 02-10-06, 13:34

I assume you want to make the change in perl.

use

Code:

$string =~ s/\bis\b/was/g;

\b is a zero width match that matches only on a word boundary.

.

jagans · #4 (**permalink**) 02-15-06, 23:45

hi all
i'd try it and its working thnk u verymuch
but the problem is whn i add more choices some textes(means substrings) are missing
neway thnks 4 ur help
bye
jag

reneeb · #5 (**permalink**) 02-16-06, 04:29

Can you post some more details about the problem?

You should post some Dummy data and code...

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