the rest operator javascript
function sum(...numbers) {
return numbers.reduce((accumulator, current) => {
return accumulator += current;
});
};
sum(1,2) // 3
sum(1,2,3,4,5) // 15the rest operator javascript
function sum(...numbers) {
return numbers.reduce((accumulator, current) => {
return accumulator += current;
});
};
sum(1,2) // 3
sum(1,2,3,4,5) // 15rest parameter javascript
function addition(...nombre) {
let resultat = 0
nombre.forEach(nombre => {
resultat+= nombre ;
});
console.log(resultat) ;
}
addition(4 ,9 ,5 ,415 ,78 , 54) ;rest parameters
// Before rest parameters, "arguments" could be converted to a normal array using:
function f(a, b) {
let normalArray = Array.prototype.slice.call(arguments)
// -- or --
let normalArray = [].slice.call(arguments)
// -- or --
let normalArray = Array.from(arguments)
let first = normalArray.shift() // OK, gives the first argument
let first = arguments.shift() // ERROR (arguments is not a normal array)
}
// Now, you can easily gain access to a normal array using a rest parameter
function f(...args) {
let normalArray = args
let first = normalArray.shift() // OK, gives the first argument
}how to assign an rest operator in javascript
function multiply(multiplier, ...theArgs) {
return theArgs.map(element => {
return multiplier * element
})
}
let arr = multiply(2, 1, 2, 3)
console.log(arr) // [2, 4, 6]rest operator javascript
function fun1(...theArgs) {
console.log(theArgs.length);
}
fun1(); // 0
fun1(5); // 1
fun1(5, 6, 7); // 3spread operator javascript
[a, b, ...objIteravel] = [1, 2, 3, 4, 5];Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
