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lilyball/sorted_over.swift

Last active March 12, 2019 21:01
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sorted_over.swift
extension Collection {
func sorted<T: Comparable>(over: (Element) -> T) -> [Element] {
var projections: [(T, Index)] = indices.map({ (over(self[$0]), $0) })
projections.sort(by: { $0.0 < $1.0 })
return projections.map({ self[$0.1] })
}
}
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