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Re: eq vs. ==

by liz (Monsignor)
on Jul 20, 2003 at 10:32 UTC ( #276023=note: print w/replies, xml ) Need Help??


in reply to eq vs. ==

Maybe this answers your question:

$val eq '2'
String compare string value of $val with string '2'.

$val == '2'
Convert string '2' to number, and numerically compare with numeric value of $val

$val == 2
Compare numeric 2 with numeric value of $val

If a string starts with a number, its numeric value will be that number. Consider the following examples:

$ perl -e "print 'a' == 'b'"
True because 0 == 0

$ perl -e "print 'a' == '1b'"
Not true because 0 != 1

$ perl -e "print 'a' == 'b1'"
True because 0 == 0

Liz

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[Corion]: I think I should define a set of (say) five projects through which I rotate from time to time, just to prevent myself from being bored/annoyed by the problems they get stuck in ;)
[marto]: Corion, not bringing the kids would make it ideal :P
[marto]: a suggestion, have one project in the list that isn't programming/perl related
[Corion]: marto: Yeah, things are more parent-friendly the way they are ;))
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[marto]: Corion, yes something 'artistic', so that or some music. Even combine some things, build a musical instrument :)
[Corion]: marto: Naah, I'm avoiding that rabbit hole ;) Sometimes I think of using Perl to create MIDI to generate music, or at least the harmonies to which I could jam, but then that would eat even more into available time ;-))

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