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https://github.com/krahets/hello-algo.git
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Merge branch 'master' into master
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@@ -1,6 +1,6 @@
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// File: array.go
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// Created Time: 2022-12-29
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// Author: cathay (cathaycchen@gmail.com)
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// Author: GuoWei (gongguowei01@gmail.com), cathay (cathaycchen@gmail.com)
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package chapter_array_and_linkedlist
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@@ -9,11 +9,18 @@ import (
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"math/rand"
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)
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/**
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我们将 Go 中的 Slice 切片看作 Array 数组,降低理解成本,
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有利于我们将关注点放在数据结构与算法上。
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*/
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/* 随机返回一个数组元素 */
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func randomAccess(nums []int) int {
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func randomAccess(nums []int) (randomNum int) {
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// 在区间 [0, nums.length) 中随机抽取一个数字
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randomIndex := rand.Intn(len(nums))
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randomNum := nums[randomIndex]
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return randomNum
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// 获取并返回随机元素
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randomNum = nums[randomIndex]
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return
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}
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/* 扩展数组长度 */
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@@ -21,8 +28,8 @@ func extend(nums []int, enlarge int) []int {
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// 初始化一个扩展长度后的数组
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res := make([]int, len(nums)+enlarge)
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// 将原数组中的所有元素复制到新数组
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for i, num := range nums {
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res[i] = num
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for i := 0; i < len(nums); i++ {
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res[i] = nums[i]
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}
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// 返回扩展后的新数组
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return res
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@@ -53,22 +60,20 @@ func traverse(nums []int) {
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for i := 0; i < len(nums); i++ {
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count++
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}
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fmt.Println(count)
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count = 0
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// 直接遍历数组
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for range nums {
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count++
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for index, val := range nums {
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fmt.Printf("index:%v value:%v\n", index, val)
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}
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fmt.Println(count)
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}
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/* 在数组中查找指定元素,返回第一个索引位置,未查找到则返回 -1 */
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func find(nums []int, target int) int {
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/* 在数组中查找指定元素 */
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func find(nums []int, target int) (index int) {
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index = -1
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for i := 0; i < len(nums); i++ {
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if nums[i] == target {
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return i
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index = i
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break
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}
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}
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return -1
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return
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}
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@@ -1,9 +1,14 @@
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// File: array_test.go
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// Created Time: 2022-12-29
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// Author: cathay (cathaycchen@gmail.com)
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// Author: GuoWei (gongguowei01@gmail.com), cathay (cathaycchen@gmail.com)
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package chapter_array_and_linkedlist
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/**
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我们将 Go 中的 Slice 切片看作 Array 数组。因为这样可以
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降低理解成本,利于我们将关注点放在数据结构与算法上。
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*/
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import (
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"fmt"
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"testing"
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@@ -12,10 +17,9 @@ import (
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/* Driver Code */
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func TestArray(t *testing.T) {
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/* 初始化数组 */
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var arr = [5]int{}
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var arr []int
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fmt.Println("数组 arr =", arr)
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var nums = []int{1, 3, 2, 5, 4}
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nums := []int{1, 3, 2, 5, 4}
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fmt.Println("数组 nums =", nums)
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/* 随机访问 */
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@@ -32,7 +36,7 @@ func TestArray(t *testing.T) {
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/* 删除元素 */
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remove(nums, 2)
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fmt.Println("删除索引 2 处的元素,得到 nums = ", nums)
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fmt.Println("删除索引 2 处的元素,得到 nums =", nums)
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/* 遍历数组 */
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traverse(nums)
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