[Newbies] Re: A do with ONLY index? (plus,. a style question)

[Klaus D. Witzel]

Hi Blake,

on Sun, 04 Feb 2007 10:35:33 +0100, you wrote:

> On Sat, 03 Feb 2007 20:44:50 -0800, Todd Blanchard wrote:
>
>> initializeWithPoint: aPoint
>>
>> 	rows := (interval 1 to: aPoint x) collect: [:r | Array new: aPoint y].
>
> Also, stylistically, is it preferred to have an instance-based  
> initializer rather than a class-based variation on "new"?

You might want to compare:

class side>>new
	| instance |
	instance := self new.
	instance thisAndThat "extra code needed".
	^ instance

instance side>>initialize
	"sent automatically by Behavior>>new"
	iVar1 := 'text'.
	iVar2 := 0

The latter is preferable over the former (less code, less maintenance).  
But often people put utility methods like #on:, #with: etc on the class  
side, for non-trivial initializations.

 From the (re-)usability point of view, if you had getters/setters (like in  
traits), the perfect approach is
	x := MyClass new setY: 'text';
		setZ: 0;
		yourself.

Or, like I prefer to do it
	(x := MyClass new)
		setY: 'text';
		setZ: 0.

/Klaus