Merge pull request #96 from Slone123c/patch

Hashing search and test using go
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Yudong Jin 2022-12-13 00:21:38 +08:00 committed by GitHub
commit a5b473f718
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3 changed files with 84 additions and 2 deletions

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@ -0,0 +1,29 @@
// File: binary_search.go
// Created Time: 2022-12-12
// Author: Slone123c (274325721@qq.com)
package chapter_searching
import . "github.com/krahets/hello-algo/pkg"
/* 哈希查找(数组) */
func hashingSearch(m map[int]int, target int) int {
// 哈希表的 key: 目标元素value: 索引
// 若哈希表中无此 key ,返回 -1
if index, ok := m[target]; ok {
return index
} else {
return -1
}
}
/* 哈希查找(链表) */
func hashingSearch1(m map[int]*ListNode, target int) *ListNode {
// 哈希表的 key: 目标结点值value: 结点对象
// 若哈希表中无此 key ,返回 nil
if node, ok := m[target]; ok {
return node
} else {
return nil
}
}

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@ -0,0 +1,35 @@
// File: binary_search.go
// Created Time: 2022-12-12
// Author: Slone123c (274325721@qq.com)
package chapter_searching
import (
"fmt"
. "github.com/krahets/hello-algo/pkg"
"testing"
)
func TestHashingSearch(t *testing.T) {
target := 3
/* 哈希查找(数组) */
nums := []int{1, 5, 3, 2, 4, 7, 5, 9, 10, 8}
// 初始化哈希表
m := make(map[int]int)
for i := 0; i < len(nums); i++ {
m[nums[i]] = i
}
index := hashingSearch(m, target)
fmt.Println("目标元素 3 的索引 = ", index)
/* 哈希查找(链表) */
head := ArrayToLinkedList(nums)
// 初始化哈希表
m1 := make(map[int]*ListNode)
for head != nil {
m1[head.Val] = head
head = head.Next
}
node := hashingSearch1(m1, target)
fmt.Println("目标结点值 3 的对应结点对象为 ", node)
}

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@ -53,7 +53,16 @@ comments: true
=== "Go" === "Go"
```go title="hashing_search.go" ```go title="hashing_search.go"
/* 哈希查找(数组) */
func hashingSearch(m map[int]int, target int) int {
// 哈希表的 key: 目标元素value: 索引
// 若哈希表中无此 key ,返回 -1
if index, ok := m[target]; ok {
return index
} else {
return -1
}
}
``` ```
=== "JavaScript" === "JavaScript"
@ -121,7 +130,16 @@ comments: true
=== "Go" === "Go"
```go title="hashing_search.go" ```go title="hashing_search.go"
/* 哈希查找(链表) */
func hashingSearch1(m map[int]*ListNode, target int) *ListNode {
// 哈希表的 key: 目标结点值value: 结点对象
// 若哈希表中无此 key ,返回 nil
if node, ok := m[target]; ok {
return node
} else {
return nil
}
}
``` ```
=== "JavaScript" === "JavaScript"