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go/doc/progs/sortmain.go

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// 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 main
import Sort "sort"
func ints() {
data := []int{74, 59, 238, -784, 9845, 959, 905, 0, 0, 42, 7586, -5467984, 7586};
a := Sort.IntArray{&data};
Sort.Sort(&a);
if !Sort.IsSorted(&a) {
panic()
}
}
func strings() {
data := []string{"monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"};
a := Sort.StringArray{&data};
Sort.Sort(&a);
if !Sort.IsSorted(&a) {
panic()
}
}
type Day struct {
num int;
short_name string;
long_name string;
}
type DayArray struct {
data *[]*Day;
}
func (p *DayArray) len() int { return len(p.data); }
func (p *DayArray) less(i, j int) bool { return p.data[i].num < p.data[j].num; }
func (p *DayArray) swap(i, j int) { p.data[i], p.data[j] = p.data[j], p.data[i]; }
func days() {
Sunday := Day{ 0, "SUN", "Sunday" };
Monday := Day{ 1, "MON", "Monday" };
Tuesday := Day{ 2, "TUE", "Tuesday" };
Wednesday := Day{ 3, "WED", "Wednesday" };
Thursday := Day{ 4, "THU", "Thursday" };
Friday := Day{ 5, "FRI", "Friday" };
Saturday := Day{ 6, "SAT", "Saturday" };
data := []*Day{&Tuesday, &Thursday, &Sunday, &Monday, &Friday};
a := DayArray{&data};
Sort.Sort(&a);
if !Sort.IsSorted(&a) {
panic()
}
for i := 0; i < len(data); i++ {
print(data[i].long_name, " ")
}
print("\n")
}
func main() {
ints();
strings();
days();
}