Скачать или смотреть JavaScript Maps - All you need to Know / JavaScript Complete Map tutorial

JavaScript Maps - All you need to Know / JavaScript Complete Map tutorial

Code:

// the map obj holds key-value pairs
//Creating a Map
let myMapTest = new Map()
//Map Size
console.log(myMapTest.size)
//Set Values for map
myMapTest.set(1,"Test1")
myMapTest.set(2,"Test2")
myMapTest.set(3,"Test3")
//Printing the Map
console.log(myMapTest)
//creating an Object
let obj = {
"size":1
}
//Getting the map values based on GET
console.log(myMapTest.get(1))
//key value pairs of Map
for (let [key,value] of myMapTest){
console.log(`${key} : ${value}`)
}

//Using entries
for (let [key,value] of myMapTest.entries()){
console.log(`${key} : ${value}`)
}
//Using has method
console.log(myMapTest.has(0))
//Using ForEach Map method
myMapTest.forEach((value)= console.log(`${value}`)) // arrow function
//Deleting a key in Map
myMapTest.delete(1)
console.log(myMapTest)
//Loop for deleting Keys
for (let key of myMapTest.keys()){
myMapTest.delete(key)
}

Description:

Maps in javascript
JavaScript Map and Set Explained
JavaScript Array Map
JavaScript Higher Order Functions & Arrays
JavaScript Maps | JavaScript Tutorial In Hindi
Map in Javascript
map Array Method | JavaScript Tutorial

Chapters:

0:00 - Introduction
0:56 - Map creation and its size
1:45 - Map set method
3:10 - Creating a simple object to show its difference with Maps
4:44 - Map get method and key value pairs
6:29 - Map clear method
7:12 - Map delete method
8:55 - Map entries method
10:18 - Map has method
11:01 - Map for each method
12:54 - End Tags and subscription to channel

Next Steps :

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#javascript
#javascriptHIgherOrderFunctions