added filling if considered empty

src/Containers-Array2D-Tests/CTNewArray2DTest.class.st

@@ -104,6 +104,19 @@ CTNewArray2DTest >> testExtentFromArray [
 	self assert: (foo at: 3 @ 2) equals: 6
 ]
 
+{ #category : 'tests' }
+CTNewArray2DTest >> testFillIfEmpty [ 
+
+	| array |
+	array := CTNewArray2D width: 2 height: 3. 
+
+	self assert: array isEmpty.
+
+	array fillIfEmpty.
+
+	self deny: array isEmpty.
+]
+
 { #category : 'tests' }
 CTNewArray2DTest >> testFromArray [
 

src/Containers-Array2D/CTNewArray2D.class.st

@@ -204,6 +204,17 @@ CTNewArray2D >> extent: extent fromArray: anArray [
 	contents := anArray
 ]
 
+{ #category : 'as yet unclassified' }
+CTNewArray2D >> fillIfEmpty [ 
+
+	self isEmpty ifFalse: [ ^ self ].
+
+	self tabulate: [ :x :y | MygAbstractBox new ].
+
+	^ self 
+
+]
+
 { #category : 'enumerating' }
 CTNewArray2D >> fromBottomToTopFromLeftToRightDo: aBlock [
 	"Apply a block to each element following that order bottom to top but from left gto right "
@@ -341,6 +352,12 @@ CTNewArray2D >> indexOfX: x y: y [
 	^ (y - 1) * width + x
 ]
 
+{ #category : 'testing' }
+CTNewArray2D >> isEmpty [ 
+
+	^ self contents includes: nil
+]
+
 { #category : 'inspector' }
 CTNewArray2D >> isSelfEvaluating [