es6 destructuring parameters code example

Example 1: destructuring assignment

Destructuring assignment is special syntax introduced in ES6, 
for neatly assigning values taken directly from an object.

const user = { name: 'John Doe', age: 34 };

const { name, age } = user;
// name = 'John Doe', age = 34

Example 2: javascript function destructuring

function f() {
  return [1, 2];
}

let a, b; 
[a, b] = f(); 
console.log(a); // 1
console.log(b); // 2

Example 3: array destructuring methods parameters

function foo([a, b]) {
   console.log(`param1: ${a}, param2: ${b}`);
}

Example 4: array destructuring methods parameters

const items = [ ['foo', 3], ['bar', 9] ];
items.forEach(([word, count]) => {
    console.log(word+' '+count);
});