22 lines
321 B
Markdown
22 lines
321 B
Markdown
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## ?
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Function
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Is the item on the top of the stack "truthy"?
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### Definition
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> [dup](#dup) [bool](#bool)
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### Discussion
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You often want to test the truth value of an item on the stack without
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consuming the item.
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### Crosslinks
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[bool](#bool)
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