Resizing multidimensional arrays

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george++

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Location: Thessaloniki, Hellas

Posted: 13th Feb 2017 21:33 Edited at: 13th Feb 2017 21:35

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Hi,
How can I resize multidimensional arrays?
The following example generates an error:

+ Code Snippet

SetErrorMode(2)
SetWindowTitle( "probe" )
SetWindowSize( 1024, 768, 0 )
SetVirtualResolution( 1024, 768 )
SetOrientationAllowed( 1, 1, 1, 1 )
SetSyncRate( 30, 0 )
UseNewDefaultFonts( 1 )

global myArray as integer[-1, -1]

myArray.length = 9
myArray[0].length = 9

do
	myArray[3, 5] = 5
	Sync()	
loop

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Scraggle

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Location: Yorkshire

Posted: 13th Feb 2017 21:55

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It's not something I've tried doing before but a quick test suggests that you need to set the length of each secondary element individually:

+ Code Snippet

array as integer[-1,-1]

array.length = 9
for k = 0 to array.length
	array[k].length = 9
next k

do
	for k = 0 to array.length
		print(array[k].length)
	next k
	sync()
loop

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george++

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Posted: 13th Feb 2017 22:15

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Thanks Scraggle for your tip, but I really cannot understand this approach.
How many lengths can have a 2-dimensional array? I thought it was only 2

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Scraggle

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Posted: 13th Feb 2017 22:27

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So did I but this test proves that each secondary element can be a different length:

+ Code Snippet

array as integer[-1,-1]

array.length = 5
counter = 0
for k = 0 to array.length
	array[k].length = random(1,5)
	for j = 0 to array[k].length
		array[k,j] = counter
		inc counter
	next j
next k

do
	print("Array Length = " + str(array.length))
	print("")
	for k = 0 to array.length
		print("Sub length "+str(k)+" = " + str(array[k].length))
	next k
	print("")
	print("Contents:")
	for k = 0 to array.length
		for j = 0 to array[k].length
			printc(str(array[k,j])+" ")
		next j
		print("")
	next k
	sync()
loop

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george++

AGK Tool Maker

17

Years of Service

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Joined: 13th May 2007

Location: Thessaloniki, Hellas