A cleaner implementation would be to define this method in UndefinedObject and
Collection only. It should not appear in Object, the same way #isEmptyOrNil is
defined.
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Benoit St-Jean
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"A standpoint is an intellectual horizon of radius zero". (A. Einstein)
From: Sebastian Sastre <[email protected]>
To: Pharo Development List <[email protected]>
Sent: Sunday, January 4, 2015 5:27 PM
Subject: [Pharo-dev] Object>>ifNilOrEmpty: aBlock
Hi guys,
I’ve started to use this little one:
Object>>ifNilOrEmpty: aBlock
self ifNil: [ ^ aBlock value ].
(self isCollection and: [
self isEmpty ]) ifTrue: [ ^ aBlock value ].
^ self.
It allows you to do the widely known JavaScript one-liner:
var stuff = this.thing || ‘some default value for when this.thing is undefined,
null or an empty string’.
but in smalltalk in this way:
stuff := self thing ifNilOrEmpty: [ ‘some default value for when self thing is
nil or an empty string’ ]
simple thing feels practical and nice :)
