7 Mar
2010
7 Mar
'10
11:35 p.m.
Hi,
I agree that we need a convenience construct for expressing properties
based on a condition, but I do not like the format you propose :).
In VW, we had the following method:
RectangleShape>>ifTrue: conditionBlock fillColor: colorBlock
| oldBlock |
oldBlock := self fillColor ifNil: self defaultFillColor.
^self fillColor: [ :each | (conditionBlock mondrianValue: each)
ifTrue: [ colorBlock ] ifFalse: [ oldBlock ]].
Your examples would look like:
shape rectangle ifTrue: #isCovered fillColor: #lightRed.
shape rectangle ifTrue: [:m | m isCovered] fillColor: #lightRed.
shape rectnagle
fillColor: #white;
ifTrue: #isCovered fillColor: #lightRed.
Now, I would just rename "ifTrue:fillColor:" to "when:fillColor:" or
"if:fillColor:".
Cheers,
Doru
On 7 Mar 2010, at 23:02, Stéphane Ducasse wrote:
ok but still send the code because right now I do not
get it.
Stef
On Mar 7, 2010, at 5:37 PM, Alexandre Bergel wrote:
--
www.tudorgirba.com
"It's not how it is, it is how we see it."
I method that I wrote some times ago. It sorts
collection in a
fancy way.
Alexandre
On 7 Mar 2010, at 13:10, Stéphane Ducasse wrote:
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STf
On Mar 7, 2010, at 3:38 PM, Alexandre Bergel wrote:
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Here is a short script excerpt I use.
view shape rectangle
size: 10;
fillColor: [ :aMethod | aMethod isCovered ifTrue: [ Color
lightRed ] ifFalse: [ Color white ]].
view nodes: (aClass methods sortedAs: #isCovered).
I feel the way the color is set is very verbose.
The following are equivalent
fillColor: { #isCovered -> #lightRed }
fillColor: { [:m | m isCovered] -> #lightRed }
fillColor: { #isCovered -> #lightRed . [:m | m isCovered not ] ->
#white}
The white color could be the default color is no color is picked
up.
In the script above, I also use #sortedAs: to sort my elements. I
find this method quite handy. It is defined as an extension of
Collection. It is more flexible than Jannik's #sortedBy: and
Moose's #sorted:. #sortedAs operates on boolean as well.
Any opinion?
Cheers,
Alexandre
--
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Alexandre Bergel http://www.bergel.eu
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