mirror of
https://github.com/golang/go
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64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package sort
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type Interface interface {
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Len() int
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Less(i, j int) bool
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Swap(i, j int)
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}
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func Sort(data Interface) {
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for i := 1; i < data.Len(); i++ {
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for j := i; j > 0 && data.Less(j, j-1); j-- {
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data.Swap(j, j-1)
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}
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}
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}
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func IsSorted(data Interface) bool {
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n := data.Len()
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for i := n - 1; i > 0; i-- {
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if data.Less(i, i - 1) {
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return false
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}
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}
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return true
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}
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// Convenience types for common cases
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type IntSlice []int
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func (p IntSlice) Len() int { return len(p) }
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func (p IntSlice) Less(i, j int) bool { return p[i] < p[j] }
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func (p IntSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
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type Float64Slice []float64
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func (p Float64Slice) Len() int { return len(p) }
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func (p Float64Slice) Less(i, j int) bool { return p[i] < p[j] }
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func (p Float64Slice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
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type StringSlice []string
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func (p StringSlice) Len() int { return len(p) }
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func (p StringSlice) Less(i, j int) bool { return p[i] < p[j] }
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func (p StringSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
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// Convenience wrappers for common cases
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func SortInts(a []int) { Sort(IntSlice(a)) }
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func SortFloat64s(a []float64) { Sort(Float64Slice(a)) }
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func SortStrings(a []string) { Sort(StringSlice(a)) }
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func IntsAreSorted(a []int) bool { return IsSorted(IntSlice(a)) }
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func Float64sAreSorted(a []float64) bool { return IsSorted(Float64Slice(a)) }
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func StringsAreSorted(a []string) bool { return IsSorted(StringSlice(a)) }
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