Preview: example_search_test.go
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/proc/thread-self/root/opt/golang/1.22.0/src/sort/example_search_test.go
// Copyright 2016 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"
"sort"
)
// This example demonstrates searching a list sorted in ascending order.
func ExampleSearch() {
a := []int{1, 3, 6, 10, 15, 21, 28, 36, 45, 55}
x := 6
i := sort.Search(len(a), func(i int) bool { return a[i] >= x })
if i < len(a) && a[i] == x {
fmt.Printf("found %d at index %d in %v\n", x, i, a)
} else {
fmt.Printf("%d not found in %v\n", x, a)
}
// Output:
// found 6 at index 2 in [1 3 6 10 15 21 28 36 45 55]
}
// This example demonstrates searching a list sorted in descending order.
// The approach is the same as searching a list in ascending order,
// but with the condition inverted.
func ExampleSearch_descendingOrder() {
a := []int{55, 45, 36, 28, 21, 15, 10, 6, 3, 1}
x := 6
i := sort.Search(len(a), func(i int) bool { return a[i] <= x })
if i < len(a) && a[i] == x {
fmt.Printf("found %d at index %d in %v\n", x, i, a)
} else {
fmt.Printf("%d not found in %v\n", x, a)
}
// Output:
// found 6 at index 7 in [55 45 36 28 21 15 10 6 3 1]
}
// This example demonstrates searching for float64 in a list sorted in ascending order.
func ExampleSearchFloat64s() {
a := []float64{1.0, 2.0, 3.3, 4.6, 6.1, 7.2, 8.0}
x := 2.0
i := sort.SearchFloat64s(a, x)
fmt.Printf("found %g at index %d in %v\n", x, i, a)
x = 0.5
i = sort.SearchFloat64s(a, x)
fmt.Printf("%g not found, can be inserted at index %d in %v\n", x, i, a)
// Output:
// found 2 at index 1 in [1 2 3.3 4.6 6.1 7.2 8]
// 0.5 not found, can be inserted at index 0 in [1 2 3.3 4.6 6.1 7.2 8]
}
// This example demonstrates searching for int in a list sorted in ascending order.
func ExampleSearchInts() {
a := []int{1, 2, 3, 4, 6, 7, 8}
x := 2
i := sort.SearchInts(a, x)
fmt.Printf("found %d at index %d in %v\n", x, i, a)
x = 5
i = sort.SearchInts(a, x)
fmt.Printf("%d not found, can be inserted at index %d in %v\n", x, i, a)
// Output:
// found 2 at index 1 in [1 2 3 4 6 7 8]
// 5 not found, can be inserted at index 4 in [1 2 3 4 6 7 8]
}
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