Array Element Occurence Snippet (Muhammad Ahsan)

index.js

const arrExample = [5,5,2,2,1]

let occurence = {}

arrExample.forEach((item) => {
	if(Object.keys(occurence).includes(item.toString())){
  	occurence[item] = occurence[item] + 1
  } else occurence[item] = 1
})

let greaterValue = 0
let greaterKey = ""

Object.keys(occurence).map(item => {
	if(occurence[item] >= greaterValue){
  	greaterValue = occurence[item]
    greaterKey = item
  }
})

console.log(greaterValue > 1 ? greaterKey : -1 )