Syntax for "Array of Arrays" (Jagged Array) ?

[DiffrenzyKeymaster]

What is the syntax for declaring this? (Not multidimentional arrays)

Since the below code compiles, I assume Arrays of Arrays are still in , but I can’t seem to get  the declaration syntax right.  Local jag:Float[][] = New ????

Local arrlist:= New List<Float[]>
arrlist.AddLast(New Float[4])
Local multi:= multi.ToArray()

Function Test:Void(tes:Float[][])

End function

[Mark SiblyKeymaster]

Quick demo:

 

Monkey

Function Main() Local w:=20,h:=10 Local t:=New Int[][w] For Local x:=0 Until w t[x]=New Int[h] Next For Local y:=0 Until h For Local x:=0 Until w Print t[x][y] Next Next End

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Function Main()   Local w:=20,h:=10 Local t:=New Int[][w] For Local x:=0 Until w   t[x]=New Int[h] Next For Local y:=0 Until h   For Local x:=0 Until w    Print t[x][y]   Next Next   End

Note that the ‘new’ is sort of back to front, ie: in the ‘New Int[][w]’ bit, w comes last, but when you’re indexing with ‘x’ it comes first!

This actually makes sense to me as a compiler coder, ie: ‘New Int[][w]’ is w new int arrays, which is what we want, but I think java/c# parse things kind of differently so you end up with ‘New Int[w][]’ instead, which or may not make more sense to others.

I’m pretty relaxed about changing this if enough people prefer the Java way.

[DiffrenzyKeymaster]

Hi Mark, thanks for clearing it up, I don’t think I would have figured that out

I’m all for changing it to the java/monkey1/c# for consistency between languages.

Also, it seems logical, that the major dimension, that holds the elements are declared first.

[nerobotParticipant]

deleted.

[codifiesParticipant]

errr wot!

Monkey

[crayon-5cb9bda5403ec254894812 inline="true" ] Global a:Int[] = New Int[10] global b:Int[][] 'Global c:Int[][] = New Int[10][10] 'Global d:Int[][] = New Int[10]Int[10] 'Global e:Int[][] = New Int[10] New Int[10] Function Main() End Function

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[crayon-5cb9bda5403ec254894812 inline="true" ] Global a:Int[] = New Int[10]   global b:Int[][]   'Global c:Int[][] = New Int[10][10] 'Global d:Int[][] = New Int[10]Int[10] 'Global e:Int[][] = New Int[10] New Int[10]   Function Main() End Function

[/crayon]

if b works why the heck doesn’t c (like a few other languages) – do I really need a loop just to make an empty array?

[abakoboParticipant]

If you want some ‘rectangular array’ you can do the following:

Monkey

[crayon-5cb9bda5431d8531085164 inline="true" ] Local map1:= new int[10,10] Local map2:= new int[7,9]

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[crayon-5cb9bda5431d8531085164 inline="true" ] Local map1:= new int[10,10] Local map2:= new int[7,9]

[/crayon]

or

Monkey

[crayon-5cb9bda5431de718646357 inline="true" ] Local map1:int[,] Local map2:Int[,] map1= new int[10,10] map2= new int[7,9]

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[crayon-5cb9bda5431de718646357 inline="true" ] Local map1:int[,] Local map2:Int[,] map1= new int[10,10] map2= new int[7,9]

[/crayon]

If you want an array of various arrays (non-rectangular/jagged) you’ll have to loop as mark showed. h could have different values during the loop.

[codifiesParticipant]

…ah jee that should be in the docs!

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