JavaScript tricks

tricks.js

// Converting NodeList to Arrays
[].slice.call(document.querySelectorAll(query));

// Shuffling array’s elements
[1,2,3].sort(Math.random() - 0.5); // [2,1,3]

// Caching the array.length in the loop
for(var i = 0, length = array.length; i < length; i++) {
    console.log(array[i]);
}

// Merging arrays
var array1 = [1,2,3];
var array2 = [4,5,6];
console.log(array1.push.apply(array1, array2));