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732ea4c2dc
Change-Id: I5fa4773467e3f515250deead72fdce3e4bd0973b Reviewed-on: https://go-review.googlesource.com/c/go/+/275457 Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com> Reviewed-by: Robert Griesemer <gri@golang.org> Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com> TryBot-Result: Go Bot <gobot@golang.org> Trust: Robert Griesemer <gri@golang.org>
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
// 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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// This example demonstrates searching for float64 in a list sorted in ascending order.
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func ExampleSearchFloat64s() {
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a := []float64{1.0, 2.0, 3.3, 4.6, 6.1, 7.2, 8.0}
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x := 2.0
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i := sort.SearchFloat64s(a, x)
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fmt.Printf("found %g at index %d in %v\n", x, i, a)
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x = 0.5
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i = sort.SearchFloat64s(a, x)
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fmt.Printf("%g not found, can be inserted at index %d in %v\n", x, i, a)
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// Output:
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// found 2 at index 1 in [1 2 3.3 4.6 6.1 7.2 8]
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// 0.5 not found, can be inserted at index 0 in [1 2 3.3 4.6 6.1 7.2 8]
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}
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// This example demonstrates searching for int in a list sorted in ascending order.
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func ExampleSearchInts() {
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a := []int{1, 2, 3, 4, 6, 7, 8}
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x := 2
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i := sort.SearchInts(a, x)
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fmt.Printf("found %d at index %d in %v\n", x, i, a)
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x = 5
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i = sort.SearchInts(a, x)
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fmt.Printf("%d not found, can be inserted at index %d in %v\n", x, i, a)
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// Output:
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// found 2 at index 1 in [1 2 3 4 6 7 8]
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// 5 not found, can be inserted at index 4 in [1 2 3 4 6 7 8]
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}
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