go remove from map
m := map[string]string{"key1": "val1", "key2": "val2"}
delete(m, "key1")go remove from map
m := map[string]string{"key1": "val1", "key2": "val2"}
delete(m, "key1")initialize map in golang
// By default maps in Go behaves like a default dictionary in python
m := make(map[string]int)
m["Dio"] = 3
m["Jonathan"] = 1length of map golang
package main
import "fmt"
func main() {
var employee = make(map[string]int)
employee["Mark"] = 10
employee["Sandy"] = 20
// Empty Map
employeeList := make(map[string]int)
fmt.Println(len(employee)) // 2
fmt.Println(len(employeeList)) // 0
}golang map
//map in go is a built in type implementaiton of has table
//create an empty map
myMap := make(map[string]string)
//insert key-value pair in map
myMap["key"] = "value"
//read from map
value, ok := myMap["key"]
//delete from map
delete(myMap, "key")go add to map
m := make(map[string]int)
m["numberOne"] = 1
m["numberTwo"] = 2golang map
package main
import (
"fmt"
)
type User struct {
Name string
Age int
}
func main() {
var person = map[string]string{
"name": "john doe",
"age": "23",
}
var profile = make(map[string]string)
profile["name"] = "jane doe"
profile["age"] = "23"
var user = make(map[string]interface{})
user["name"] = "peter parker"
user["age"] = 30
var users = []map[string]interface{}{
{"name": "monkey d lufy", "age": 19},
{"name": "trafagar d law", "age": 23},
{"name": "nico robin", "age": 20},
}
var userStruct = map[string]User{
"name": {Name: "Monkey D Lufy"},
"age": {Age: 19},
}
fmt.Println(person)
fmt.Println(profile)
fmt.Println(user)
fmt.Println(users)
fmt.Println(userStruct)
}Copyright © 2021 Codeinu
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