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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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[ambrus]: Like <c>{ package AnyEvent::Impl:: Prima; use Prima; sub io{ my($s,%r)=@_; Prima::File->new( file=>$r{fh},mask =>("w"eq$r{poll}? fe::Write():fe:: Read())|fe:: Exception,onRead =>$r{cb},onWrite =>$r{cb}, onException=>$r{cb }) } sub timer { ... } push @AnyEvent::REGI
[ambrus]: argh, too long, let me try on scratchpad
[Corion]: . o O ( I seem to have improved my skills of getting other people to write code for me )
[ambrus]: ambrus's scratchpad

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