Passing an Array as Function Parameter in JavaScript

Passing an array as individual parameters to a function can be tedious and inefficient. Consider the following code:

const x = ['p0', 'p1', 'p2'];
call_me(x[0], x[1], x[2]); // Unwieldy and prone to errors

Solution 1: Function.prototype.apply()

To pass an array's contents as parameters, you can use the Function.prototype.apply() method:

const args = ['p0', 'p1', 'p2'];
call_me.apply(this, args);

The apply() method takes two parameters: the context and an array of parameters to pass. In this case, this is the function's context, and args is an array of the array's elements.

Solution 2: Spread Arguments (ES6 and above)

If using ECMAScript 6 or higher is feasible, you can use spread arguments instead:

call_me(...args);

Spread arguments allow you to directly pass the contents of an array as parameters without the need for intermediate storage.