Check out the MUST-KNOW array fundamental methods in JavaScript.
1. PUSH
The Array.Push() adds a new element, containing the entered variable, to the end of the array.
2. POP
The Array.Pop() method on the other hand, does quite the opposite, deleting the last element of an array.
3. SHIFT
Shift works almost exactly like POP, with one major difference. It deletes the first value in an array and moves the rest backwards.
4. UNSHIFT
Unshift adds a new value to the start of an array instead of the end (Like the PUSH does)
5. SPLICE
It's first argument determines where to add new elements.
The Second argument is how many after that point should be deleted.
All other arguments are values you're adding.
6. SLICE
Slice creates a new Array that contains every element from a certain point on in whatever array you give it!
7. CONCAT
Concat returns a new array with all members of the current one & adds item to it.
