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RE: Comparing Scalars and Arrays

by autark (Friar)
on Jul 19, 2000 at 21:31 UTC ( #23250=note: print w/replies, xml ) Need Help??

in reply to Comparing Scalars and Arrays

If it smells like grep and looks like grep, then it must be grep :-)
if( grep { $scalar == $_ } @array ) { print "$scalar is member of @array\n"; } else { print "$scalar is not member of @array\n"; }
I see that you in your question has assigned an anonymous array to @array, if that really is the case, then you have to do some more work:
$scalar = 3; @array = ([1, 2], [3, 4, 5], [6, 7, 8 ,9]); if( grep { $scalar == $_ } map { @$_ } @array ) { print "Yes\n" } else { print "No\n" }

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RE: RE: Comparing Scalars and Arrays
by cwest (Friar) on Jul 19, 2000 at 21:36 UTC
    IMHO, your second example is great, but the condition seems like it could be more readable. Since you use grep, why not use it again, instead of map
    grep { grep { $scalar == $_ } @{$_} } @array
    Just MHO...

    Update:And it's faster, 1000000 iterations has Grep+Grep at 11 Walclocks and Grep+Map at 16.


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