| // Copyright 2011 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_test |
| |
| import ( |
| "fmt" |
| "math" |
| "sort" |
| ) |
| |
| func ExampleInts() { |
| s := []int{5, 2, 6, 3, 1, 4} // unsorted |
| sort.Ints(s) |
| fmt.Println(s) |
| // Output: [1 2 3 4 5 6] |
| } |
| |
| func ExampleIntsAreSorted() { |
| s := []int{1, 2, 3, 4, 5, 6} // sorted ascending |
| fmt.Println(sort.IntsAreSorted(s)) |
| |
| s = []int{6, 5, 4, 3, 2, 1} // sorted descending |
| fmt.Println(sort.IntsAreSorted(s)) |
| |
| s = []int{3, 2, 4, 1, 5} // unsorted |
| fmt.Println(sort.IntsAreSorted(s)) |
| |
| // Output: true |
| // false |
| // false |
| } |
| |
| func ExampleFloat64s() { |
| s := []float64{5.2, -1.3, 0.7, -3.8, 2.6} // unsorted |
| sort.Float64s(s) |
| fmt.Println(s) |
| |
| s = []float64{math.Inf(1), math.NaN(), math.Inf(-1), 0.0} // unsorted |
| sort.Float64s(s) |
| fmt.Println(s) |
| |
| // Output: [-3.8 -1.3 0.7 2.6 5.2] |
| // [NaN -Inf 0 +Inf] |
| } |
| |
| func ExampleFloat64sAreSorted() { |
| s := []float64{0.7, 1.3, 2.6, 3.8, 5.2} // sorted ascending |
| fmt.Println(sort.Float64sAreSorted(s)) |
| |
| s = []float64{5.2, 3.8, 2.6, 1.3, 0.7} // sorted descending |
| fmt.Println(sort.Float64sAreSorted(s)) |
| |
| s = []float64{5.2, 1.3, 0.7, 3.8, 2.6} // unsorted |
| fmt.Println(sort.Float64sAreSorted(s)) |
| |
| // Output: true |
| // false |
| // false |
| } |
| |
| func ExampleReverse() { |
| s := []int{5, 2, 6, 3, 1, 4} // unsorted |
| sort.Sort(sort.Reverse(sort.IntSlice(s))) |
| fmt.Println(s) |
| // Output: [6 5 4 3 2 1] |
| } |
| |
| func ExampleSlice() { |
| people := []struct { |
| Name string |
| Age int |
| }{ |
| {"Gopher", 7}, |
| {"Alice", 55}, |
| {"Vera", 24}, |
| {"Bob", 75}, |
| } |
| sort.Slice(people, func(i, j int) bool { return people[i].Name < people[j].Name }) |
| fmt.Println("By name:", people) |
| |
| sort.Slice(people, func(i, j int) bool { return people[i].Age < people[j].Age }) |
| fmt.Println("By age:", people) |
| // Output: By name: [{Alice 55} {Bob 75} {Gopher 7} {Vera 24}] |
| // By age: [{Gopher 7} {Vera 24} {Alice 55} {Bob 75}] |
| } |
| |
| func ExampleSliceStable() { |
| |
| people := []struct { |
| Name string |
| Age int |
| }{ |
| {"Alice", 25}, |
| {"Elizabeth", 75}, |
| {"Alice", 75}, |
| {"Bob", 75}, |
| {"Alice", 75}, |
| {"Bob", 25}, |
| {"Colin", 25}, |
| {"Elizabeth", 25}, |
| } |
| |
| // Sort by name, preserving original order |
| sort.SliceStable(people, func(i, j int) bool { return people[i].Name < people[j].Name }) |
| fmt.Println("By name:", people) |
| |
| // Sort by age preserving name order |
| sort.SliceStable(people, func(i, j int) bool { return people[i].Age < people[j].Age }) |
| fmt.Println("By age,name:", people) |
| |
| // Output: By name: [{Alice 25} {Alice 75} {Alice 75} {Bob 75} {Bob 25} {Colin 25} {Elizabeth 75} {Elizabeth 25}] |
| // By age,name: [{Alice 25} {Bob 25} {Colin 25} {Elizabeth 25} {Alice 75} {Alice 75} {Bob 75} {Elizabeth 75}] |
| } |
| |
| func ExampleStrings() { |
| s := []string{"Go", "Bravo", "Gopher", "Alpha", "Grin", "Delta"} |
| sort.Strings(s) |
| fmt.Println(s) |
| // Output: [Alpha Bravo Delta Go Gopher Grin] |
| } |