64 Arrays methods
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const strings = ['a', 'b', 'c', 'd'];
// 4*4 = 16 bytes of storage in a 32-bit sustem
// LOOKUP O(1)
// console.log(strings[2]); // O(1)
// Methods we can add in arrays
// PUSH O(1) - add item to end of an array
strings.push('e'); // O(1). [ 'a', 'b', 'c', 'd', 'e' ]
// Pop - remove last item in the array
strings.pop(); // O(1) [ 'a', 'b', 'c', 'd' ]
// INSERT O(n): Unshift - add item in the beginning of an array
strings.unshift('x'); // O(n) [ 'x', 'a', 'b', 'c', 'd' ]
// DELETE O(n): Splice - insert an item at a position, optionally either
// deleting the previous item or moving it towards the end
strings.splice(2, 0, 'alien'); // O(n) [ 'x', 'a', 'alien', 'b', 'c', 'd' ]
console.log(strings);
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