How to init array?

[DiffrenzyKeymaster]

Can’t seem to nail this, so what is the MX2 equivalent of :

Local score:Int[]=[10,20,30]

[scurtyParticipant]

Monkey

Local MyArray:Int[] = New Int[](1, 2, 3) ' I think. xD

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Local MyArray:Int[] = New Int[](1, 2, 3)   ' I think. xD

[DiffrenzyKeymaster]

Thanks scurty! Is it documented somewhere?

[nerobotParticipant]

Somewhere on the forum is..

[codifiesParticipant]

… if only there was a wiki for all this stuff…

[Mark SiblyKeymaster]

… if only there was a wiki for all this stuff…

This is fundamental stuff that *should* be in the language reference, not a wiki.

It’s my fault it isn’t of course, and I’ll be spending some time soon updating the docs.

[XaronParticipant]

So how can I init a 2d array?

Monkey

Global map:Int[,] map = New Int[10,10] 'Now I'd like to fill that array line by line, something like: map[,0] = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ] 'doesn't work obviously but how can I achieve that? map[,1] = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]

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Global map:Int[,] map = New Int[10,10]   'Now I'd like to fill that array line by line, something like: map[,0] = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ] 'doesn't work obviously but how can I achieve that? map[,1] = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]

edit: Found the solution: http://monkey2.monkey-x.com/forums/topic/way-to-predefineinline-define-an-array-of-arrays/

[AdamStrangeParticipant]

field _tracks:Track[, ] = New Track[64, 8]

tried to do the fill using different methods, but none worked. best solution would be to use data and read it into the array?

[DaniloParticipant]

@xaron:
Maybe you could use array-of-arrays for this case?

Monkey

#Import "<std>" Using std.. Function Main() Global map := New Int[][10] 'Now I'd like to fill that array line by line, something like: map[0] = New Int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ) map[1] = New Int[]( 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 ) map[2] = New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ) map[3] = New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ) map[4] = New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 ) map[5] = New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 ) map[6] = New Int[]( 0, 0, 0, 8, 8, 8, 8, 0, 0, 0 ) map[7] = New Int[]( 0, 0, 8, 0, 0, 0, 0, 8, 0, 0 ) map[8] = New Int[]( 0, 8, 0, 0, 0, 0, 0, 0, 8, 0 ) map[9] = New Int[]( 8, 0, 0, 0, 0, 0, 0, 0, 0, 8 ) For Local i := 0 Until 10 Local out:String = "" For Local j := 0 Until 10 out += String( map[i][j] ) + " " Next Print out Next End

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#Import "<std>"   Using std..     Function Main()       Global map := New Int[][10]       'Now I'd like to fill that array line by line, something like:     map[0] = New Int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 )     map[1] = New Int[]( 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 )     map[2] = New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 )     map[3] = New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 )     map[4] = New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 )     map[5] = New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 )     map[6] = New Int[]( 0, 0, 0, 8, 8, 8, 8, 0, 0, 0 )     map[7] = New Int[]( 0, 0, 8, 0, 0, 0, 0, 8, 0, 0 )     map[8] = New Int[]( 0, 8, 0, 0, 0, 0, 0, 0, 8, 0 )     map[9] = New Int[]( 8, 0, 0, 0, 0, 0, 0, 0, 0, 8 )       For Local i := 0 Until 10           Local out:String = ""           For Local j := 0 Until 10         out += String( map[i][j] ) + " "         Next           Print out       Next   End

[Mark SiblyKeymaster]

There’s currently no way to init 2d arrays like this sorry. You’ll need to use an array of arrays, ala Danilo suggestion, or manually initalize elements one by one.

I do plan to add this eventually (and N-d copies, slices etc) but it’s a little tricky due to c++-isms, and with 3d, 4d arrays etc the syntax gets pretty weird.

[nobuyukiParticipant]

yay slices.  Best of luck

[XaronParticipant]

Thanks guys!

[DaniloParticipant]

Another way for initializing an array-of-arrays, provided by Mark himself:

Monkey

#Import "<std>" Using std.. Function Main() Global map := New Int[][] ( New Int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ), New Int[]( 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 ), New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ), New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ), New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 ), New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 ), New Int[]( 0, 0, 0, 8, 8, 8, 8, 0, 0, 0 ), New Int[]( 0, 0, 8, 0, 0, 0, 0, 8, 0, 0 ), New Int[]( 0, 8, 0, 0, 0, 0, 0, 0, 8, 0 ), New Int[]( 8, 0, 0, 0, 0, 0, 0, 0, 0, 8 ) ) For Local i := 0 To 9 Local out:String = "" For Local j := 0 To 9 out += String( map[i][j] ) + " " Next Print out Next End

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#Import "<std>"   Using std..     Function Main()       Global map := New Int[][] (         New Int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ),         New Int[]( 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 ),         New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ),         New Int[]( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ),         New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 ),         New Int[]( 0, 0, 0, 0, 8, 8, 0, 0, 0, 0 ),         New Int[]( 0, 0, 0, 8, 8, 8, 8, 0, 0, 0 ),         New Int[]( 0, 0, 8, 0, 0, 0, 0, 8, 0, 0 ),         New Int[]( 0, 8, 0, 0, 0, 0, 0, 0, 8, 0 ),         New Int[]( 8, 0, 0, 0, 0, 0, 0, 0, 0, 8 ) )       For Local i := 0 To 9           Local out:String = ""           For Local j := 0 To 9             out += String( map[i][j] ) + " "         Next           Print out       Next   End

Good example for the MX2-CODE-COLLECTION.

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