Lesson 2: mostCommon - Takes in an array of numbers & find the most common number (using objects might help)

[seemcat]

Input: [1,0,2,2,4]
Output: 2

Input: [0,0,0,1,1,1,1]
Output: 1

[songz]

const val = arr[i];
if(!map[val]) map[val] = 0;
map[val] = map[val] + 1;

Object.keys(map) // returns [1,0,2,4]

[songz]

First, build an object (key is number, value is how many times that number shows up in the array)
Then, go through the object to find out the maximum value.

[seemcat]

*Going off what Song explained; once you find the maximum value it is only clear what the most common number is.

Input: [1,0,2,2,4]
Output: 2

When you create an object for this array it will look like: { 1: 1, 0: 1, 2: 2, 4: 1 }. 2 has the maximum value because it is in the array twice. Therefore, you return 2.