spread and rest javascript
var myName = ["Marina" , "Magdy" , "Shafiq"];var newArr = [...myName ,"FrontEnd" , 24];console.log(newArr) ; // ["Marina" , "Magdy" , "Shafiq" , "FrontEnd" , 24 ] ;spread and rest javascript
var myName = ["Marina" , "Magdy" , "Shafiq"];var newArr = [...myName ,"FrontEnd" , 24];console.log(newArr) ; // ["Marina" , "Magdy" , "Shafiq" , "FrontEnd" , 24 ] ;spread and rest javascript
var myName = ["Marina" , "Magdy" , "Shafiq"] ;const [firstName , ...familyName] = myName ;console.log(firstName); // Marina ;console.log(familyName); // [ "Magdy" , "Shafiq"] ;javascript rest parameters vs spread operator
/**
* JS Spread and Rest operators:
* Two operators with the same syntax (...) but behave differently
*/
// Rest parameter: collects all remaining elements into an array.
function foo (...args) { console.log(args) }
foo(1,2,3,4,5,6) // Output: (6) [1,2,3,4,5,6]
// Spread operator: allows iterables to be expanded into single elements.
let arr = [1, 2, 3];
let arrCopy = [-1, 0, ...arr]; // spread the array into a list of parameters
// then put the result into a new arraythe rest operator javascript
function sum(...numbers) {
return numbers.reduce((accumulator, current) => {
return accumulator += current;
});
};
sum(1,2) // 3
sum(1,2,3,4,5) // 15spread and rest operator javascript
function myData(...args){console.log(args) ; // ["Marina",24,"Front-End Developer"]}myData("Marina",24,"Front-End Developer") ;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
