On May 23, pda said:
> <!--
> <td>
>
>now her i want a regular expression where it has to check for the <!--
>and come to the new line and also check whether if there is a <td> in
>the given file if it finds it has to replace with a other string.
>
>this is what i tryed on the command prompt.
>
>perl -pi -e 's{^<!--\n<td>}{test}' hello.txt
This is because your file is read in line-by-line, so there's no way for
Perl to match something after the newline. Try reading the file in all at
once:
perl -0777 -pi -e 's{^<!--\n<td>}{test}m' hello.txt
Two things:
-0 is for the input record separator (what separates "lines")
setting it to 777 means "read the entire file at once; you might be
ok using -0000, which reads "paragraphs" (text separated by 2 or more
newlines)
the /m modifier makes ^ match at the beginning of a string *OR* at the
beginning of a "line" (right after a \n); it also changes $ to match
at the end of a "line" too (right before a newline)
--
Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
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Perl Programmer at RiskMetrics Group, Inc. http://www.riskmetrics.com/
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** I need a publisher for my book "Learning Perl's Regular Expressions" **
