Re^3: How foreach loops decide what to iterate through


There's more than one way to do things
	PerlMonks

by jasonk (Parson)

on Feb 15, 2009 at 18:33 UTC ( [id://743951]=note: print w/replies, xml )

Need Help??

Essentially what you are doing is something like this:

my @a = (1);

for ( my $i = 0 ; $i <= $#a ; $i++ ) {
    push( @a, 1 );
}
[download]

So the loop isn't being restarted or re-evaluated, but because you are extending the thing it's iterating over, it never gets to the end.

www.jasonkohles.com
We're not surrounded, we're in a target-rich environment!

Comment on Re^3: How foreach loops decide what to iterate through Download Code

Replies are listed 'Best First'.
Re^4: How foreach loops decide what to iterate through by jvector (Friar) on Feb 15, 2009 at 22:38 UTC
The insight moment for me in this thread was getting when it is that an anonymous array is created and used (and therefore the loop is unaffected by modifications to the original array during its execution) as opposed to the original array itself being used during the loop. Note to self: check copy of PBP to see if this is mentioned. Find "This signature" for less on Ebay	[reply]
Re^5: How foreach loops decide what to iterate through by ikegami (Patriarch) on Feb 16, 2009 at 02:24 UTC
an anonymous array is created and used An anonymous list, not an anonymous array. (Well, all lists are anonymous.) No array is created. Arguments and return values of functions and subs are placed on the stack as a list of scalars.	[reply]

Domain Nodelet^?

Node Status^?

node history
Node Type: note [id://743951]
help

Chatterbox^?

How do I use this? • Last hour • Other CB clients

Other Users^?

Others browsing the Monastery: (5)

As of 2024-04-25 17:03 GMT

Sections^?

Information^?

Find Nodes^?

Leftovers^?

Voting Booth^?

No recent polls found