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Nested for... each statments

BlitzPlus Forums/BlitzPlus Programming/Nested for... each statments

schilcote(Posted 2009) [#1]
Is is possible to put a For... Each loop inside another For... Each loop? Like this:

For space.planet=Each planet

For space.planet=Each planet

;yadda yadda yadda

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I need to do this because I have a bunch of things in a type that need to react to every other thing in the type, and therefore I need to ieterate through each thing in the type for each thing in the type.

Oh, forgot to say: if I try this, it runs up untill the for...each loops, and crashes. But if I remove one for...each, then it "works" (it runs, but dosn't do what I want it to do.).


Pineapple(Posted 2009) [#2]
For this.object=Each object ;The current object
For other.object=Each object ;Check it against another object

     ;This if statement confirms that we're not comparing the object against itself, 
     ;because in most instances, doing this will mess things up.
     If this.object<>other.object Then

          ;Do stuff

     Endif

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schilcote(Posted 2009) [#3]
Umm... I'm not totally sure that's what I need. Here's the loop I am attempting to accomplish.

For space.particle=Each particle

For space.particle=Each particle


space\x=space\x+Sgn(space\x-lastparticlex)*lastparticlemass
space\y=space\y+Sgn(space\y-lastparticley)*lastparticlemass



lastparticlex=space\x
lastparticley=space\y
lastparticlemass=space\mass

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I need to go through each thing in the type collection, then for each thing in the type collection, go through each thing in the same type collection.


Who was John Galt?(Posted 2009) [#4]
You can't have the same loop counter variable (space) in each loop in the nest or they will interfere.


Sauer(Posted 2009) [#5]
Yeah, usually I'll use:
For space.Particle=Each Particle
  For space1.Particle=Each Particle
    do something
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schilcote(Posted 2009) [#6]
Okay, it works now, now I just need to find a way to keep the things from flying off the screen...