I have been attempting to add elements to an array by using the current length of the array as the index for the next element. Here is an example:
var arr = ["one","two","three"];
arr[this.length] = "four";
However, instead of adding "four" to the end of the array, it replaces the first element resulting in ["four", "two", "three"]. Am I not correctly referencing the array with this?
The current utilization is of the length property sourced from the Window entity.
Window.length
This retrieves the count of frames (either or elements) within the window.
In this particular scenario, it is yielding 0.
console.log("length" in window);
console.log(window.length);The intended action should be:
var arr = ["one","two","three"];
arr[arr.length] = "four";
console.log(arr);Does the term "this" refer to the array in question?
No, it does not. To clarify the concept of using "this", please refer to the information provided at https://www.w3schools.com/js/js_this.asp. In your current code snippet, consider utilizing the syntax arr.length instead. Another option is to use arr.push() for adding an element to the end of the array.
Utilizing ES6 destructuring syntax to create a new array without causing any side effects...
const originalArray = ['apple', 'banana', 'cherry'];
const newArrayWithOrange = [...originalArray, 'orange'];
Instead of using Array.prototype.push, why not explore other array manipulation methods?
let numbers = [1, 2, 3];
numbers.push(4);
For more information, check out: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push
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