1 // Copyright 2011 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package sort_test 6 7 import ( 8 "fmt" 9 "math" 10 "sort" 11 ) 12 13 func ExampleInts() { 14 s := []int{5, 2, 6, 3, 1, 4} // unsorted 15 sort.Ints(s) 16 fmt.Println(s) 17 // Output: [1 2 3 4 5 6] 18 } 19 20 func ExampleIntsAreSorted() { 21 s := []int{1, 2, 3, 4, 5, 6} // sorted ascending 22 fmt.Println(sort.IntsAreSorted(s)) 23 24 s = []int{6, 5, 4, 3, 2, 1} // sorted descending 25 fmt.Println(sort.IntsAreSorted(s)) 26 27 s = []int{3, 2, 4, 1, 5} // unsorted 28 fmt.Println(sort.IntsAreSorted(s)) 29 30 // Output: true 31 // false 32 // false 33 } 34 35 func ExampleFloat64s() { 36 s := []float64{5.2, -1.3, 0.7, -3.8, 2.6} // unsorted 37 sort.Float64s(s) 38 fmt.Println(s) 39 40 s = []float64{math.Inf(1), math.NaN(), math.Inf(-1), 0.0} // unsorted 41 sort.Float64s(s) 42 fmt.Println(s) 43 44 // Output: [-3.8 -1.3 0.7 2.6 5.2] 45 // [NaN -Inf 0 +Inf] 46 } 47 48 func ExampleFloat64sAreSorted() { 49 s := []float64{0.7, 1.3, 2.6, 3.8, 5.2} // sorted ascending 50 fmt.Println(sort.Float64sAreSorted(s)) 51 52 s = []float64{5.2, 3.8, 2.6, 1.3, 0.7} // sorted descending 53 fmt.Println(sort.Float64sAreSorted(s)) 54 55 s = []float64{5.2, 1.3, 0.7, 3.8, 2.6} // unsorted 56 fmt.Println(sort.Float64sAreSorted(s)) 57 58 // Output: true 59 // false 60 // false 61 } 62 63 func ExampleReverse() { 64 s := []int{5, 2, 6, 3, 1, 4} // unsorted 65 sort.Sort(sort.Reverse(sort.IntSlice(s))) 66 fmt.Println(s) 67 // Output: [6 5 4 3 2 1] 68 } 69 70 func ExampleSlice() { 71 people := []struct { 72 Name string 73 Age int 74 }{ 75 {"Gopher", 7}, 76 {"Alice", 55}, 77 {"Vera", 24}, 78 {"Bob", 75}, 79 } 80 sort.Slice(people, func(i, j int) bool { return people[i].Name < people[j].Name }) 81 fmt.Println("By name:", people) 82 83 sort.Slice(people, func(i, j int) bool { return people[i].Age < people[j].Age }) 84 fmt.Println("By age:", people) 85 // Output: By name: [{Alice 55} {Bob 75} {Gopher 7} {Vera 24}] 86 // By age: [{Gopher 7} {Vera 24} {Alice 55} {Bob 75}] 87 } 88 89 func ExampleSliceStable() { 90 91 people := []struct { 92 Name string 93 Age int 94 }{ 95 {"Alice", 25}, 96 {"Elizabeth", 75}, 97 {"Alice", 75}, 98 {"Bob", 75}, 99 {"Alice", 75}, 100 {"Bob", 25}, 101 {"Colin", 25}, 102 {"Elizabeth", 25}, 103 } 104 105 // Sort by name, preserving original order 106 sort.SliceStable(people, func(i, j int) bool { return people[i].Name < people[j].Name }) 107 fmt.Println("By name:", people) 108 109 // Sort by age preserving name order 110 sort.SliceStable(people, func(i, j int) bool { return people[i].Age < people[j].Age }) 111 fmt.Println("By age,name:", people) 112 113 // Output: By name: [{Alice 25} {Alice 75} {Alice 75} {Bob 75} {Bob 25} {Colin 25} {Elizabeth 75} {Elizabeth 25}] 114 // By age,name: [{Alice 25} {Bob 25} {Colin 25} {Elizabeth 25} {Alice 75} {Alice 75} {Bob 75} {Elizabeth 75}] 115 } 116 117 func ExampleStrings() { 118 s := []string{"Go", "Bravo", "Gopher", "Alpha", "Grin", "Delta"} 119 sort.Strings(s) 120 fmt.Println(s) 121 // Output: [Alpha Bravo Delta Go Gopher Grin] 122 } 123
