Respond to an unknown method call: Difference between revisions
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(Add SuperCollider example) |
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True |
True |
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slate[2]></lang> |
slate[2]></lang> |
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=={{header|SuperCollider}}== |
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<lang SuperCollider> |
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Ingorabilis { |
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tell { |
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"I told you so".postln; |
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} |
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find { |
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"I found nothing".postln |
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} |
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doesNotUnderstand { |selector ... args| |
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"Method selector '%' not understood by %\n".postf(selector, this.class); |
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"Giving you some good arguments in the following".postln; |
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args.do { |x| x.postln }; |
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"And now I delegate the method to my respected superclass".postln; |
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super.doesNotUnderstand(selector, args) |
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} |
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} |
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</lang> |
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Usage: |
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=={{header|Smalltalk}}== |
=={{header|Smalltalk}}== |
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There is a utility method for exactly the above (it catches only #fooBar to the original receiver): |
There is a utility method for exactly the above (it catches only #fooBar to the original receiver): |
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<lang smalltalk>anObject perform:#fooBar ifNotUnderstood:[ ...some alternative code and return value... ].</lang> |
<lang smalltalk>anObject perform:#fooBar ifNotUnderstood:[ ...some alternative code and return value... ].</lang> |
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<lang SuperCollider> |
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i = Ingorabilis.new; |
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i.tell; // prints "I told you so" |
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i.find; // prints ""I found nothing" |
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i.think(1, 3, 4, 7); |
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</lang> |
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The latter answers: |
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<lang SuperCollider>Method selector 'think' not understood by Ingorabilis |
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Giving you some good arguments in the following |
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1 |
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3 |
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4 |
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7 |
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And now I delegate the method to my respected superclass |
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ERROR: Message 'think' not understood. |
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RECEIVER: |
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Instance of Ingorabilis { (0x1817b1398, gc=D4, fmt=00, flg=00, set=00) |
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instance variables [0] |
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} |
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<...></lang> |
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=={{header|Tcl}}== |
=={{header|Tcl}}== |
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