Re: Check multiple array elements for a single condition

in reply to Check multiple array elements for a single condition

You could also use the Smart::Match module with smartmatching:

use Smart::Match 'all';

if ( 0 ~~ all(@array[0,1]) ) {
    say 'matched';
}
[download]

Or you could do exactly the same thing "natively", in Perl 6:

if @array[0 & 1] == 0 {
    say 'matched';
}
[download]

Damian

Comment on Re: Check multiple array elements for a single condition Select or Download Code

Replies are listed 'Best First'.
Re^2: Check multiple array elements for a single condition by Linicks (Scribe) on Aug 25, 2016 at 18:12 UTC
Just thinking - what about: `if (!(@array[0]+@array[1]))` Nick	[reply] [d/l]
Re^3: Check multiple array elements for a single condition by afoken (Chancellor) on Aug 25, 2016 at 18:35 UTC
`if (!(@array[0]]+@array[1]))` False positive if `$array[0] == -$array[1]`. Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply] [d/l] [select]
Re^4: Check multiple array elements for a single condition by Linicks (Scribe) on Aug 25, 2016 at 18:40 UTC
Please explain what you mean by 'false positive'? Thanks, Nick	[reply]
Re^5: Check multiple array elements for a single condition by afoken (Chancellor) on Aug 25, 2016 at 18:47 UTC
Re^6: Check multiple array elements for a single condition by Linicks (Scribe) on Aug 25, 2016 at 18:58 UTC
Re^3: Check multiple array elements for a single condition by RonW (Parson) on Aug 26, 2016 at 19:37 UTC
Try `if (!(@array[0] \| @array[1]))` instead. (For reasons afoken stated.)	[reply] [d/l]
Re^4: Check multiple array elements for a single condition by afoken (Chancellor) on Aug 27, 2016 at 10:05 UTC
Try `if (!(@array[0] \| @array[1]))` instead Don't, for the reason Marshall++ explained. Micro-optimising code to avoid typing a few characters does not improve performance, and makes maintenance a nightmare (if overused). Also, your code assumes integers, right? I would have to look up the binary representation(s) of a float 0.0 to see if all bits are 0 there. If not, this probably won't work, resulting once again in wrong results (false negatives, in this case). Maybe floats depend on the CPU and / or math emulation library used, so the result would also depend on the machine it is running on. No, thanks. I prefer code that does not make me think about such issues. For two or three elements, explicitly compare the elements. For more, see my generalised posting. Playing golf is a completely different story, but then, the array's name would not be five letters long. Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply] [d/l]
Re^2: Check multiple array elements for a single condition by Anonymous Monk on Sep 10, 2016 at 16:00 UTC
Isn't Smart Match deprecated?	[reply]

In Section Seekers of Perl Wisdom