1. Hashing search and test using go

codes/go/chapter_searching/hashing_search.go

@@ -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"
+	_ "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（数组） */
+func hashingSearch1(m map[int]*pkg.ListNode, target int) *pkg.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
+	}
+}

codes/go/chapter_searching/hashing_search_test.go

@@ -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 := pkg.ArrayToLinkedList(nums)
+	// 初始化哈希表
+	m1 := make(map[int]*pkg.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)
+}