// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package sort_test
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import (
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"fmt"
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"sort"
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)
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// This example demonstrates searching a list sorted in ascending order.
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func ExampleSearch() {
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a := []int{1, 3, 6, 10, 15, 21, 28, 36, 45, 55}
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x := 6
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i := sort.Search(len(a), func(i int) bool { return a[i] >= x })
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if i < len(a) && a[i] == x {
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fmt.Printf("found %d at index %d in %v\n", x, i, a)
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} else {
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fmt.Printf("%d not found in %v\n", x, a)
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}
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// Output:
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// found 6 at index 2 in [1 3 6 10 15 21 28 36 45 55]
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}
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// This example demonstrates searching a list sorted in descending order.
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// The approach is the same as searching a list in ascending order,
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// but with the condition inverted.
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func ExampleSearch_descendingOrder() {
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a := []int{55, 45, 36, 28, 21, 15, 10, 6, 3, 1}
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x := 6
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i := sort.Search(len(a), func(i int) bool { return a[i] <= x })
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if i < len(a) && a[i] == x {
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fmt.Printf("found %d at index %d in %v\n", x, i, a)
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} else {
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fmt.Printf("%d not found in %v\n", x, a)
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}
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// Output:
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// found 6 at index 7 in [55 45 36 28 21 15 10 6 3 1]
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}
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