jdhedden's meditation from yesterday highlights one anomalous aspect of each that catches us all out at first, and in my case at least, sometimes second and third. This gets raised here every few months, and that's a good thing as the latest bunch of recruits to PM get warned of the problem.

Whilst the general concensus is that it is only a problem until you know about it, there is another, related but different expression of this anomaly that I have never seen raised here. Hence a second meditation rather than a reply to the first.

If you run the following code, it loops forever. 

#! perl -slw
use strict;

$, = ' ';

my %h; @h{ 'a' .. 'z' } = 1 .. 26;
print %h;

while( my $k = each %h ) {
    print "$k ", %h;
}

[download]

Can you see why?

<Reveal this spoiler or all in this thread>
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to The anomalous each()--Part II. by BrowserUk

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