Gossamer Forum: Products: Gossamer Links: Discussions: How to join 2 Hash's into one?

Aug 14, 2004, 9:52 PM

ryel01

Veteran (1264 posts)

Aug 14, 2004, 9:52 PM

Post #1 of 8

Shortcut

How to join 2 Hash's into one?

if I've got 2 hash...

$hash1
$hash2

how can I join them so all variables are in one like..

$hash3

thanks
regan.

Aug 15, 2004, 2:58 AM

Andy

Veteran / Moderator (18441 posts)

Aug 15, 2004, 2:58 AM

Post #2 of 8

Shortcut

Re: [ryel01] How to join 2 Hash's into one? In reply to

I'd like to know this too Smile

You can do a dirty hack with something like;

Code:
$hash_1 = ; # defined earlier 
$hash_2 = ; # defined earlier 

$hash_1->{YourField} = $hash_2->{YourField}

Cheers

Andy (mod)
andy@ultranerds.co.uk

Aug 15, 2004, 4:13 AM

ryel01

Veteran (1264 posts)

Aug 15, 2004, 4:13 AM

Post #3 of 8

Shortcut

Re: [Andy] How to join 2 Hash's into one? In reply to

thanks andy - there's no way to assign "all" values over easily is there? maybe a for or while loop... (I can't remember how to do it it's been too long since I put my mind to programming!). Blush

Aug 15, 2004, 1:14 PM

Jagerman

Staff (2198 posts)

Aug 15, 2004, 1:14 PM

Post #4 of 8

Shortcut

Re: [ryel01] How to join 2 Hash's into one? In reply to

$hashref3 = {%$hashref1, %$hashref2};

Keys in both hashref1 and hashref2 will end up with hashref2's value in hashref3 - reverse the order of $hashref1, $hashref2 if you want the opposite behaviour.

Jason Rhinelander
Gossamer Threads
jason@gossamer-threads.com

Aug 15, 2004, 1:56 PM

ryel01

Veteran (1264 posts)

Aug 15, 2004, 1:56 PM

Post #5 of 8

Shortcut

Re: [Jagerman] How to join 2 Hash's into one? In reply to

thanks jason!

that's what I was after exactly! overwriting the values too.

never knew you could do it that way.

cheers!

Regan.

Aug 16, 2004, 12:40 AM

Andy

Veteran / Moderator (18441 posts)

Aug 16, 2004, 12:40 AM

Post #6 of 8

Shortcut

Re: [Jagerman] How to join 2 Hash's into one? In reply to

In Reply To:

$hashref3 = {%$hashref1, %$hashref2};

Keys in both hashref1 and hashref2 will end up with hashref2's value in hashref3 - reverse the order of $hashref1, $hashref2 if you want the opposite behaviour.

Thanks

Andy (mod)
andy@ultranerds.co.uk

Aug 16, 2004, 1:05 AM

ryel01

Veteran (1264 posts)

Aug 16, 2004, 1:05 AM

Post #7 of 8

Shortcut

Re: [Andy] How to join 2 Hash's into one? In reply to

Hey Andy - it's pretty good huh!

FYI - I've just been working with it and you can list as many hash's as you like to allocate to the new hash - each will override the one to the left of it.

$NEWhash = { %$hash1, %$hash2, %$hash4, %$hash4...} ;

r

Aug 16, 2004, 1:13 AM

Andy

Veteran / Moderator (18441 posts)

Aug 16, 2004, 1:13 AM

Post #8 of 8

Shortcut

Re: [ryel01] How to join 2 Hash's into one? In reply to

Quote:

Sweet

This is something I've wanted to do for ages, but never really had the need to do it (thus havn't bothered learning).

Cheers

Andy (mod)
andy@ultranerds.co.uk