1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sort
export type SortInterface interface {
len() int;
less(i, j int) bool;
swap(i, j int);
}
export func Sort(data SortInterface) {
// Bubble sort for brevity
for i := 0; i < data.len(); i++ {
for j := i; j < data.len(); j++ {
if data.less(j, i) {
data.swap(i, j)
}
}
}
}
export func IsSorted(data SortInterface) bool {
n := data.len();
for i := n - 1; i > 0; i-- {
if data.less(i, i - 1) {
return false;
}
}
return true;
}
// Convenience types for common cases
export type IntArray struct {
data *[]int;
}
func (p *IntArray) len() int { return len(p.data); }
func (p *IntArray) less(i, j int) bool { return p.data[i] < p.data[j]; }
func (p *IntArray) swap(i, j int) { p.data[i], p.data[j] = p.data[j], p.data[i]; }
export type FloatArray struct {
data *[]float;
}
func (p *FloatArray) len() int { return len(p.data); }
func (p *FloatArray) less(i, j int) bool { return p.data[i] < p.data[j]; }
func (p *FloatArray) swap(i, j int) { p.data[i], p.data[j] = p.data[j], p.data[i]; }
export type StringArray struct {
data *[]string;
}
func (p *StringArray) len() int { return len(p.data); }
func (p *StringArray) less(i, j int) bool { return p.data[i] < p.data[j]; }
func (p *StringArray) swap(i, j int) { p.data[i], p.data[j] = p.data[j], p.data[i]; }
// Convenience wrappers for common cases
export func SortInts(a *[]int) { Sort(&IntArray{a}); }
export func SortFloats(a *[]float) { Sort(&FloatArray{a}); }
export func SortStrings(a *[]string) { Sort(&StringArray{a}); }
export func IntsAreSorted(a *[]int) bool { return IsSorted(&IntArray{a}); }
export func FloatsAreSorted(a *[]float) bool { return IsSorted(&FloatArray{a}); }
export func StringsAreSorted(a *[]string) bool { return IsSorted(&StringArray{a}); }
|
