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csauve/gist:43bf117a31dca9808228

Created December 8, 2014 22:10
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Simple map-reduce in Groovy
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gistfile1.groovy
def mapReduce = { collection, mapper, reducer ->
collection.groupBy(mapper)
.collectEntries { k, v ->
[k, reducer(v)]
}
}
mapReduce([1, 6, 3, 7, 3, 9, 1, 2, 10, 9, 5, 8, 4],
{ it % 2 ? "odd" : "even" },
{ it.size })
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