JavaScript Array Map | Array map() method in JavaScript

Publicado em: 08 Novembro 2022
no canal de: Azhar Techno Coder

169

JavaScript Array Map | Array map() method in JavaScript

Code:
const num = [1,2,3,4,5,6,7,8,9,10,55]

//Scenario 1
num.map(mapCallabck);
function mapCallabck(item,index,arr){
return num
}
console.log(num)

//Scenario 2:
const doubleNumbers = num.map(mapCallabck);
function mapCallabck(item,index,arr){
return item*2;
}
console.log(doubleNumbers)

//Scenario 3
const ItemMultiplyIndex = num.map(mapCallabck);
function mapCallabck(item,index,arr){
return item*index;
}
console.log(ItemMultiplyIndex)

//Sceanrio 4
const Students =[
{
name:'A',
sno : 1,
marks : 70

},
{
name:'B',
sno : 2,
marks : 75
},
{
name:'C',
sno : 3,
marks : 80
},
]
const studentArray = Students.map(item=({
name:item.name,
marks:item.marks,
}))

console.log(studentArray)

//Scenario 5

const AmazonProducts =[
{
name:"Mobiles",
price:"10000",
count:20
},
{
name:"Laptop",
price:"30000",
count:30
}
]

const AmazonProductsArray = AmazonProducts.map(item=({
productname : item.name,
totalValue : item.price * item.count

}))
console.log(AmazonProductsArray)

//Scenario 6
const stringNum = ['1','2','3','4','a']

const numbers = stringNum.map(Number)

console.log(numbers)

Chapters:
0:00 - Introduction to the video
0:21 - Explanation with scenarios of Js map method
1:23 - Scenario 1 for map method
2:21 - Scenario 2 for map method
3:31 - Scenario 3 for map method
4:31 - Scenario 4 for map method
7:41 - Scenario 5 for map method
10:45 - Scenario 6 for map method
12:04 - End Tags and subscription to the channel

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#map
#javascript
#javascriptfunctions

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