Re: Shortcutting grep in boolean context

Alternate idiom:

$_ == $wanted and say("match"), last for @ary
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Comment on Re: Shortcutting grep in boolean context Download Code

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Re^2: Shortcutting grep in boolean context by ikegami (Patriarch) on Jan 03, 2017 at 21:36 UTC
`for @a` also avoids putting every element of the array on the stack like `map @a` and `grep @a` do.	[reply]
Re^2: Shortcutting grep in boolean context by perlancar (Hermit) on Jan 03, 2017 at 21:31 UTC
Ah yes, this is a nice idiom, and to use it in an expression, one can use e.g. `do`: `if (do { my $found; $_ == $wanted and $found = 1 and last for @ary; $found }) { say "match" }'`	[reply] [d/l]
Re^3: Shortcutting grep in boolean context by tybalt89 (Monsignor) on Jan 03, 2017 at 22:28 UTC
To avoid a temporary variable: `if( sub{ $_ == $wanted and return 1 for @ary; 0 }->() ) { say "match" +}` [download]	[reply] [d/l]
Re^4: Shortcutting grep in boolean context by perlancar (Hermit) on Jan 04, 2017 at 01:07 UTC
The sub version has a higher overhead than the do version, but the speed won't matter unless we do hundreds of thousands of calls per second or more.	[reply]