Help me in Task Completion

Perform linear search operation on an array
And given array [1, 1, 2, 3, 4, 4, 4, 5]
Put these in a map
Map should finally look like

1: 2,
2: 1,
3: 1,
4: 3,
5: 1

Key value pairs
Key is array element
Value is frequency of element in array

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That would be done with either a for loop or the Array’s .forEach method. Pseudo-code with a for loop could look like this:

let map = {};

for (let i=0; i<arr.length; i++){

  // if arr[i] is a property(key) on the map object, increase that value by 1

  // else, create that property (key) on the map object and set it to 1

return map;