32 lines
621 B
Tcl
32 lines
621 B
Tcl
# Reductions
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func main():
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# Reductions fold collections into a single value:
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>> (+: [1, 2, 3])!
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= ???
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>> (*: [2, 3, 4])!
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= ???
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# If an empty argument is given, a `none` value is returned
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empty := [:Int]
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>> (+: empty)
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= none
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# Use `or` to provide a fallback:
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>> (+: empty) or 100
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= ???
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# `_min_` and `_max_` work as reducers:
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>> (_max_: [10, 30, 20])!
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= ???
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>> (_min_.length: ["x", "abcd", "yz"])!
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= "???"
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# Comprehensions inside reductions:
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>> (+: i * 2 for i in [1, 2, 3])!
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= ???
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>> (+: i for i in 10 if i:is_prime())!
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= ???
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