tim at rowledge.org
Wed Jan 4 19:55:08 UTC 2006
On 4-Jan-06, at 11:43 AM, Ramon Leon wrote:
> How about...
> (Dictionary new)
> at: $c put: [self copy];
> at: $x put: [self cut];
> at: $v put: [self paste];
> at: keyPressed ifAbsent:.
Much more flexible to build a dictionary somewhere else - class
method perhaps - that is manipulable by some config tool. And
sharable with other user methods. Then the 'doForKeyPress:' would be
(self class keypressActions at: keyPressObject key ifAbsent:["do
nothing but at least do it quickly"]) value
Sure this is a bit UI/keymap specific as an example but it's a common
case where some body thinks a case statement is a good idea. They're
not; I think I'd even claim they're never a good idea in Smalltalk.
The really bad part is that they encode in the method everything you
can do and allow for no expansion of customization - just another
slave to the discredited early binding mentality that we should
eschew at every (late) opportunity.
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Strange OpCodes: BBL: Branch on Burned out Light
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