Discussion on: Finding a single item in an array

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Replies for: Great example of using a hash table to tally and track data. If you're interested, you could also use the Array sort() and filter() methods to qui...

Postscript

Removing duplicate items from your array
EG convert [1,2,2,1,4,8,8,9] to [1,2,4,8,9]

Create a new set from your original array and then spread the set into a new array.

const animals = ["cat","dog","monkey","cat"]
const nums = [1,7,2,4,1,1,2,7,2,4];

const uniqueAnimals = [...new Set(animals)]; // ["cat","dog","monkey"]
const uniqueNums = [...new Set(nums)]; // [1,7,2,4]