How to rewrite a line in a file


 
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Old 05-11-2007
How to rewrite a line in a file

Hi

Can anyone tell me how can rewrite a line in a file by using line number? I tried to use sed by failed to do so.
For example

HELLO
179.390 111.560
HOW TO DO
WHAT TO DO

to become

HELLO
200 3000
HOW TO DO
WHAT TO DO
 
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HTML::RewriteAttributes::Links(3pm)			User Contributed Perl Documentation		       HTML::RewriteAttributes::Links(3pm)

NAME
HTML::RewriteAttributes::Links - concise link rewriting SYNOPSIS
# up for some HTML::ResolveLink? $html = HTML::RewriteAttributes::Links->rewrite($html, "http://search.cpan.org"); # or perhaps HTML::LinkExtor? HTML::RewriteAttributes::Links->rewrite($html, sub { my ($tag, $attr, $value) = @_; push @links, $value; $value; }); DESCRIPTION
"HTML::RewriteAttributes::Links" is a special case of HTML::RewriteAttributes for rewriting links. See HTML::ResolveLink and HTML::LinkExtor for examples of what you can do with this. METHODS
"new" You don't need to call "new" explicitly - it's done in "rewrite". It takes no arguments. "rewrite" HTML, (callback|base)[, args] -> HTML See the documentation of HTML::RewriteAttributes. Instead of a callback, you may pass a string. This will mimic the behavior of HTML::ResolveLink -- relative links will be rewritten using the given string as a base URL. SEE ALSO
HTML::RewriteAttributes, HTML::Parser, HTML::ResolveLink, HTML::LinkExtor AUTHOR
Shawn M Moore, "<sartak@bestpractical.com>" LICENSE
Copyright 2008-2010 Best Practical Solutions, LLC. HTML::RewriteAttributes::Links is distributed under the same terms as Perl itself. perl v5.10.1 2010-11-18 HTML::RewriteAttributes::Links(3pm)