Likewise. for(;;) is a dirty C trick that doesnt really belong in perl. Especially when the replacement is easier to understand, less prone to error and most importantly more efficient.
Oh, really? A significant part of Perl comes from C, shell, AWK, Ada, BASIC, Python, Fortran, and other languages. Why is for (;;) a dirty C trick that doesn't really belong in Perl, and why isn't for $var (@array) a dirty AWK trick that doesn't belong in Perl? Leave it to the villains of "Harry Potter and the Secret Chamber" to strive for "pure blood".

I also disagree with your other claims. I'm not convinced that the replacement is easier to understand, less prone to error, and more efficient. Let's consider the "dirty C trick": 

    for (my $i = 0; $i < 1000000; $i += 2) {$sum += $i}

[download]

The AWK-like replacement would be: 

    for my $i (map {$_ * 2} 0 .. 1000000 / 2) {$sum += $i}

[download]

I don't think that's easier to understand, or less prone to error. As for efficientcy: 

#!/usr/bin/perl

use strict;
use warnings;

use Benchmark;

timethese -10, {
    C    =>  'my $sum; for (my $i = 0; $i < 1000000; $i += 2) {$sum +=
+ $i}',
    AWK  =>  'my $sum; for my $i (map {$_ * 2} 0 .. 1000000 / 2) {$sum
+ += $i}'
};

__END__
Benchmark: running C, AWK for at least 10 CPU seconds...
     C: 10 wallclock secs (10.66 usr +  0.00 sys = 10.66 CPU) @  1.41/
+s (n=15)
   AWK: 10 wallclock secs (10.08 usr +  0.00 sys = 10.08 CPU) @  0.69/
+s (n=7)

[download]

Abigail

In reply to Re: extracting corresponding values from another array by Abigail-II
in thread extracting corresponding values from another array by Anonymous Monk

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