Spread Operator -7
It shows merging arrays using ES6 spread operator
JavaScript 1.7
let arr1 = ['a', 'b', 'c'];
let arr2 = [1, 2, 3];
mergedArr = [...arr2, ...arr1];
console.log('merged array', mergedArr);
let arr1 = ['a', 'b', 'c'];
let arr2 = [1, 2, 3];
mergedArr = [...arr2, ...arr1];
console.log('merged array', mergedArr);