The array structure has stricter rules than a list or np.array, and this can reduce errors and make debugging easier, especially when working with numerical data.
An illustration. Suppose that array contains three integers, 0, 1, 2, and that i is equal to 1. array[i]++ changes array[1] to 2, evaluates to 1 and leaves i equal to 1. array[i++] does not modify array, evaluates to 1 and changes i to 2. A suffix operators, which you are using here, evaluates to the value of the expression before it is ...
Array increment positioning with respect to indexer in C - array [i ...
You can either use array declaration or array literal (but only when you declare and affect the variable right away, array literals cannot be used for re-assigning an array). For primitive types:
How do I declare and initialize an array in Java? - Stack Overflow
We'll use that fact later. Array.apply(null, [undefined, undefined, undefined]) is equivalent to Array(undefined, undefined, undefined), which produces a three-element array and assigns undefined to each element. How can you generalize that to N elements? Consider how Array() works, which goes something like this:
How can I loop through all the entries in an array using JavaScript?
How do I remove a specific value from an array? Something like: array.remove(value); Constraints: I have to use core JavaScript. Frameworks are not allowed.