Highest occurrence in an array or first selected in JavaScript

We are required to write a JavaScript function that takes in an array of literal values. Our function should then return the highest occurrence of an array value, and if there's an equal occurrence, we should return the first selected value of the equal occurrences.

const arr = ['25', '50', 'a', 'a', 'b', 'c']

In this case, we should return 'a'

const arr = ['75', '100', 'a', 'b', 'b', 'a']

In this case, I should also get 'a'

Example

The code for this will be −

const arr = ['25', '50', 'a', 'a', 'b', 'c'];
const arr1 = ['75', '100', 'a', 'b', 'b', 'a'];
const getMostFrequentValue = (arr = []) => {
   let count = 0, ind = -1;
   arr.forEach((el, i) => {
      this[el] = this[el] || { count: 0, ind: i };
      this[el].count++;
      if (this[el].count > count) {
         count = this[el].count;
         ind = this[el].ind;
         return;
      };
      if (this[el].count === count && this[el].ind < ind) {
         ind = this[el].ind;
      };
   }, Object.create(null));
   return arr[ind];
};
console.log(getMostFrequentValue(arr));
console.log(getMostFrequentValue(arr1));

Output

And the output in the console will be −

a
a

AmitDiwan

Updated on 24-Nov-2020 09:52:07

• Related Questions & Answers
• Highest and lowest in an array JavaScript
• Returning the highest value from an array in JavaScript
• Display first selected row in MySQL?
• Finding the first redundant element in an array - JavaScript
• Find n highest values in an object JavaScript
• First occurrence of True number in Python
• Sort an integer array, keeping first in place in JavaScript
• Removing the odd occurrence of any number/element from an array in JavaScript
• Index of first occurrence in StringCollection in C#?
• Sort an array to have specific items first in the array - JavaScript
• Return the first duplicate number from an array in JavaScript
• Finding the first non-consecutive number in an array in JavaScript
• Replace first occurrence of a character in Java
• Python - First occurrence of one list in another
• How to get the first index of an occurrence of the specified value in a string in JavaScript?