After researching various blog posts, SO threads, and lectures on subclassing Array in JavaScript, it seems like the consensus is that creating a subclass comes with its own set of challenges.
However, through experimentation, I developed my own solution:
// Here's the constructor for the new CustomArray class.
function CustomArray() {
// Enforcing strict mode to ensure cleaner code execution.
"use strict";
// Initializing a new array to maintain the special behavior of numeric properties.
var arr = [],
i;
// Setting CustomArray.prototype in the prototype chain so that the object inherits methods without breaking array functionalities.
Object.setPrototypeOf(arr, CustomArray.prototype);
// Pushing all arguments into the newly created array.
for (i = 0; i < arguments.length; i++) {
arr.push(arguments[i]);
}
// Returning the modified array with an updated prototype chain instead of returning "this".
return arr;
}
// Establishing inheritance from Array for CustomArray.
CustomArray.prototype = Object.create(Array.prototype);
// Defining a method for the CustomArray class.
CustomArray.prototype.last = function () {
return this[this.length - 1];
};
var myArray = new CustomArray("A", "B", 3);
// [ "A", "B", 3 ]
myArray.length;
// 3
myArray.push("C");
// [ "A", "B", 3, "C" ]
myArray.length;
// 4
myArray.last();
// "C"
Now my question remains: Is there any flaw or issue within this implementation? It's hard to believe that I've stumbled upon the perfect solution after others have extensively explored this realm before me.