If you just want the index, you would do something like:
1 to: collection size do: [:i | "stuff goes here" ].
If you want to fill an entire collection with a single value, try
collection atAllPut: #rock.
You can use one collection of numbers to index the other.
aCollection atAll: #(1 3 7 9 12 ) put: #rock.
You might look at Interval as well. It pretends to be a collection
and you can iterate over it.
(Interval from: 1 to: 18 by: 3) do: [:ea | Transcript show: ea
asString; space]
produces the sequence 1 4 7 10 13 16
I would probably do the grid class idea.
Object subclass: #Grid
instanceVariables: 'rows'.....
initializeWithPoint: aPoint
rows := (interval 1 to: aPoint x) collect: [:r | Array new: aPoint y].
atAllPut: anObject
rows do: [:r | r atAllPut: anObject]
atRow: row column: col
^(rows at: row) at: col
atRow: row column: col put: anObject
^(rows at: row) at: col put: anObject
rowsDo: aBlock
rows do: aBlock
cellsDo: aBlock
self rowsDo: [:row | row do: aBlock]
etc....
On Feb 3, 2007, at 5:44 PM, Blake wrote:
In a Sequencable collection, doWithIndex seems to just call
withIndexDo. Is there a "do" that passes just the index, not the
object?
My son is working on a roguelike, and we're looking at various ways
of creating the map. This is a two-dimensional map that would fit
in a character-mode, and we have this so far:
| map xBound yBound |
xBound := 80.
yBound := 24.
map := Array new: xBound.
i := 1.
[i <= xBound] whileTrue: [
map at:i put: (Array new:yBound).
i := i + 1
].
map do: [ :col|
col withIndexDo: [:obj :y|
col at:y put:#stone.
]
].
This seems to lack elegance. Better would be:
map := 2DArray new: [EMAIL PROTECTED]
map doXY: [:xy| map atXY:xy put:#stone].
Or even:
grid := Grid new: [EMAIL PROTECTED] fill: #stone.
Marcus has his 2DArray but it's peppered with caveats.
Thoughts?
===Blake===
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