Contents

• Map-字典

  • Python

  • Go

6. Map-字典

Go语言中创建一个Map

elements :=make(map[string]int)
// 或者
elements["H"] = map[string]int{
    "protons": 1,
    "neutrons": 0,
}

但是请注意，这就是您要使用的结构。

6.1. Python

#!/usr/bin/env python
# -*- coding:utf8 -*-
# auther; 18793
# Date：2020/4/21 13:50
# filename: sample1.py
elements = {}
elements["H"] = 1
print(elements["H"])  # 1

# remove by key
elements["O"] = 8
elements.pop("O")

# do something depending on the being there
if "O" in elements:
    print(elements["O"])
if "H" in elements:
    print(elements["H"])

6.2. Go

package main

import "fmt"

func main() {
    elements :=make(map[string]int)
    elements["H"] = 1
    fmt.Println(elements["H"])

    // remove by key
    elements["O"] = 8
    delete(elements, "O")

    // only do something with a element if it's in the map
    if number, ok := elements["O"];ok{
        fmt.Println(number)     // won't be printed
    }

    if number, ok := elements["H"];ok{
        fmt.Println(number)     // 1
    }
}