Re: How to check whether my array contains element x

Update:

I used one of my project this way!

if ( grep( /^$value$/, @array ) ) {
  print "found it";
}
[download]

Similar to if ( "value" ~~ @array ) but seems more explicit.

Comment on Re: How to check whether my array contains element x Download Code

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Re^2: How to check whether my array contains element x by tobyink (Canon) on Jan 17, 2013 at 13:24 UTC
Works nicely until `$value = "http+listener+1".` Make sure you `\Q...\E` or `quotemeta` your value. `perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'`	[reply] [d/l] [select]
Re^3: How to check whether my array contains element x by vinoth.ree (Monsignor) on Jan 18, 2013 at 05:31 UTC
++ tobyink Thanks for the info!	[reply]
Re^2: How to check whether my array contains element x by MidLifeXis (Monsignor) on Jan 17, 2013 at 13:33 UTC
You might want to change `/^$value$/` to `/^\Q$value\E$/`, especially if `$value` may contain re metacharacters, but it depends on the application. `while (<>) { chomp; print qr(^$_$), "\t", qr(^\Q$_\E$), "\n"; } __END__ foo (?-xism:^foo$) (?-xism:^foo$) foo[bar] (?-xism:^foo[bar]$) (?-xism:^foo\[bar\]$)` [download] --MidLifeXis	[reply] [d/l] [select]
Re^2: How to check whether my array contains element x by Your Mother (Archbishop) on Jan 17, 2013 at 20:26 UTC
What they already said except that since you're not actually using regex, you shouldn't use regex. This will be faster and have fewer caveats (I inverted the statement as a matter of stylistic preference, not because it's necessary)– `print "Found it.\n" if grep { $_ eq $value } @array;`	[reply] [d/l]