Re^3: Regex question

This will never match and is completly wrong as you mixed up $var1 and $var2.

Um, no.

C:\parrot>p1
[0] Perl> $var1 = '1.1.2'; $var2 = '1.1'; 
if( index( $var1, $var2 ) == 0 ) { print "matches" } 
else { print "Doesn't match" };;
matches

[0] Perl> $var1 = '1.1.2'; $var2 = '1.1'; 
if( index( $var2, $var1 ) == 0 ) { print "matches" } 
else { print "Doesn't match" };;
Doesn't match
[download]

but this will still be wrong because
$var2='1.11.2'; $var1='1.1';
[download]

would give you a false match

That's a good catch though. It's also easily fixed:

[0] Perl> $var1 = '1.11.2'; $var2 = '1.1'; 
if( index( $var1, "$var2." ) == 0 ) { print "matches" } 
else { print "Doesn't match" };;
Doesn't match
[download]

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

Comment on Re^3: Regex question Select or Download Code

Replies are listed 'Best First'.
Re^4: Regex question by Skeeve (Parson) on May 22, 2007 at 22:47 UTC
Indeed! I mixed it up, not you. But your fix doesn't help with: `$var2='1.1'; $var1='1.1';` [download] It will give you a false negative ;-) See my solution above which handle both cases. `s$$([},&%#}/&/]+}%&{});#$&&s&&$^X.($'^"%]=\&(\|?{%` `+`.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e	[reply] [d/l] [select]