Accumulator factory: Difference between revisions
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the above can also be done without a class to hold the block, simply by putting it into another block (i.e. an outer closure for the sum, returning an inner function which updates that sum): |
the above can also be done without a class to hold the block, simply by putting it into another block (i.e. an outer closure for the sum, returning an inner function which updates that sum): |
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{{works with|Smalltalk |
{{works with|any Smalltalk}} |
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<lang smalltalk>|factory |
<lang smalltalk>|factory accu1 accu2| |
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factory := [:initial | |
factory := [:initial | |
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]. |
]. |
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accu1 := factory value:1. |
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accu1 value:5. |
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accu2 := factory value:10. |
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accu2 value:5. |
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(accu2 value:0) printCR. "-> 15 (an integer)" |
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(accu2 value:22 factorial) printCR. "-> a large integer"</lang> |
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{{out}} |
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<pre>8.3 |
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15 |
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1124000727777607680015</pre> |
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=={{header|Standard ML}}== |
=={{header|Standard ML}}== |
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