I don't know if split is or isn't optimized; I just have a story related to split to share.

In our code library, we have a function named rand_split, which looks like this:

	sub rand_split {
	    my ($sep, $string) = @_;
	    my ($element, $char, $pos, $end, @array);

	    $end = length($string);
	    $element = "";
            for ($pos = 0; $pos < $end; $pos++) {
	        $char = substr($string, $pos, 1);
	        if ($char eq $sep) {
	            push (@array, $element);
	            $element = "";
	        } else {
	            $element = $element . $char;
	        }
	    }
	    push (@array, $element);
	    return (@array);
	}

rand_split was written by a guy named Rand a couple of programmer generations ago. We don't know why he reimplimented it; We don't know a lot of things about it. However, another programmer from around that generation claimed that "If he did it, there must have been a reason." It's not like he didn't know split didn't exist, meaning he purposefully reinvented a wheel. As nearly as we can tell, it walks like split and talks like split; Therefore, it is split. It's used in one script these days, and probably zero in the very near future, but I think we've kept it around mainly for gag value, giving every new generation of programmer something to wonder about.

In reply to Re: is split optimized? by bs
in thread is split optimized? by Anonymous Monk

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