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63 lines
1.7 KiB
Go
63 lines
1.7 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 SortInterface 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 SortInterface) {
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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 SortInterface) 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 IntArray []int
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func (p IntArray) Len() int { return len(p); }
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func (p IntArray) Less(i, j int) bool { return p[i] < p[j]; }
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func (p IntArray) Swap(i, j int) { p[i], p[j] = p[j], p[i]; }
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type FloatArray []float
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func (p FloatArray) Len() int { return len(p); }
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func (p FloatArray) Less(i, j int) bool { return p[i] < p[j]; }
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func (p FloatArray) Swap(i, j int) { p[i], p[j] = p[j], p[i]; }
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type StringArray []string
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func (p StringArray) Len() int { return len(p); }
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func (p StringArray) Less(i, j int) bool { return p[i] < p[j]; }
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func (p StringArray) 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(IntArray(a)); }
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func SortFloats(a []float) { Sort(FloatArray(a)); }
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func SortStrings(a []string) { Sort(StringArray(a)); }
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func IntsAreSorted(a []int) bool { return IsSorted(IntArray(a)); }
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func FloatsAreSorted(a []float) bool { return IsSorted(FloatArray(a)); }
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func StringsAreSorted(a []string) bool { return IsSorted(StringArray(a)); }
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