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12 lines
407 B
Scala
12 lines
407 B
Scala
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use std, functional
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data = ["apple", "banana", "cherry", "apricot", "coconut"]
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println groupby(data, def(str) = str.substring(0, 1))
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map = {"abc": 123, "test1": 234, "test2": 345, "test3": 456, "def": 567}
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println groupby(map, def(k, v) = k.startsWith("test"))
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arr = [1, 2, 3, 4, 1, 2, 3, 1, 2, 3]
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result = groupby(arr, def(v) = v % 2 == 0)
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println "even: " + result[true]
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println "odd: " + result[false]
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