Examples on how to use the forEach, reduce, map and filter methods in JavaScript

Answer 1

https://code.sololearn.com/WQ73sGfyb36k/?ref=app#js

Answer 2

You can learn from Daniel's 10 Array method
https://code.sololearn.com/WopAH9yrs62D/?ref=app
His other tutorials:
https://code.sololearn.com/WKFF4vOCr3mi/?ref=app

Answer 3

forEach is used to perform a function for each element in an array e.g
Es6 :
var fruits = ["apple", "banana"] ;
fruits.forEach((fruit) =>{
console.log(`The fruit is ${fruit} `) ;
} ) ;

Or..
var fruits = ["apple", "banana"] ;
fruits.forEach(function(fruit)
{
console.log("The fruit is " + fruit) ;
}
) ;
The forEach array method can e used in place of a for loop eg:
Es6:
var fruits = ["apple", "banana"] ;
for(let fruit of fruits)
{
console.log(`The fruit is ${fruit} `) ;
}
, in the forEach, the parameter passed to your function is a variable that represents each element of your array, it can be named anything, it took me a while to understand too, but its nice to use, i also originally came here to search how to use the reduce array method, but ill just share what i know, andvin case u dont understand te es6 for...of loop, here's the equivalent :
for(i = 0;i<fruits. length;i++) {
console.log("The fruit is "+ fruits[i]) ;
}
Hope that helped

Answer 4

https://code.sololearn.com/WVnXtMxOdp4d/?ref=app