Re: Existing in hash

The "=" sign in your if makes me wonder ;)
Why don't you want to use something as simple as? :

if ($hash{$var1} == $var2) {
  print "You are in\n";
}
else {
  print "Bad, monkay, bad!\n";
}
[download]

If you insist on more checks, you can do

if (defined($var1)) {
 ...
}
[download]

thingy. Or you can even do

if (defined($hash{$var1}) && length($hash{$var1}) > 0) {
 ...
}
[download]

staff. It's all up to you... :)

Comment on Re: Existing in hash Select or Download Code

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Re: Re: Existing in hash by bart (Canon) on Apr 28, 2003 at 09:50 UTC
I think you want eq instead of `==`. This is not PHP, or Javascript, or whatever... :) In perl, `==` does numerical comparisons only.	[reply]
Re: Re: Re: Existing in hash by halley (Prior) on Apr 28, 2003 at 12:02 UTC
The `==` operator is best for comparing numbers, or for comparing for identical references (references to the same data object). The example here didn't give much to go on. If $var1 and $var2 are references, the `$var1 eq $var2` would also work: it discovers that `"HASH(0x804c88c)" eq "HASH(0x804c88c)"`, but takes the extra time to stringize both sides. -- `[ e d @ h a l l e y . c c ]`	[reply]
Re: Re: Re: Re: Existing in hash by bart (Canon) on Apr 28, 2003 at 12:54 UTC
The guy was talking about comparing $name and $pass, so my guess is that the latter (which I presume to be the hash value) is a string. Comparing `"foo"=="bar"` will return true, which isn't worth much as a password check.	[reply] [d/l]