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Moo
Apprentice
Joined: 10 Apr 2009
Posts: 145
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 Posted: Fri Jul 09, 2010 9:08 pm
Nested #forall?
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#forall uses %i as the variable that changes for each item...
But what happens if you put one #forall inside another?
I was expecting/hoping that %i would be the item selected from the "inner" forall, and the loops would work like nested for or foreach in other languages..
So..
| Code: |
$a=a|b|c
$b=1|2|3
#forall $a {
#echo A:%i
#forall $b {
#echo B:%i
}
} |
Would hopefully produce:
| Quote: |
A:a
B:1
B:2
B:3
A:b
B:1
B:2
B:3
A:c
B:1
B:2
B:3 |
But instead it produces:
| Quote: |
A:a
A:b
A:c
A:a
B:a
B:a
B:a
A:b
B:b
B:b
B:b
A:c
B:c
B:c
B:c |
Which seems a bit strange, and not helpful..  |
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Progonoi
Magician
Joined: 28 Jan 2007
Posts: 430
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Posted: Fri Jul 09, 2010 9:14 pm
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Inner loop is %j, then %k, then %l ... IIRC that's how it went.
So you should have something like this.
| Code: |
$a=a|b|c
$b=1|2|3
#forall $a {
#echo A:%i
#forall $b {
#echo B:%j
}
}
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Moo
Apprentice
Joined: 10 Apr 2009
Posts: 145
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Posted: Fri Jul 09, 2010 9:20 pm
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| Progonoi wrote: |
| Inner loop is %j, then %k, then %l ... IIRC that's how it went. |
It works!
Now, why don't the docs mention that?  |
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GeneralStonewall
Magician
Joined: 02 Feb 2004
Posts: 364
Location: USA
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Posted: Fri Jul 09, 2010 10:35 pm
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More accurately, the outermost loop is %i and each nested loop within it progresses by one alphabetic letter.
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Rahab
Wizard
Joined: 22 Mar 2007
Posts: 2320
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Posted: Sat Jul 10, 2010 12:10 am
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You are correct that the documentation does not mention this (even though it has existed since Zmud). I have made a comment on the appropriate documentation page about this.
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