Frequency distribution of elements - JavaScript

We are required to write a JavaScript function that contains the following string −

const str = 'This string will be used to calculate frequency distribution';

We need to return an object that represents the frequency distribution of various elements present in the array.

Example

Following is the code −

const str = 'This string will be used to calculate frequency
distribution';
const frequencyDistribution = str => {
   const map = {};
   for(let i = 0; i < str.length; i++){
      map[str[i]] = (map[str[i]] || 0) + 1;
   };
   return map;
};
console.log(frequencyDistribution(str));

Output

Following is the output in the console −

{
   T: 1,
   h: 1,
   i: 6,
   s: 4,
   ' ': 8,
   t: 5,
   r: 3,
   n: 3,
   g: 1,
   w: 1,
   l: 4,
   b: 2,
   e: 5,
   u: 4,
   d: 2,
   o: 2,
   c: 3,
   a: 2,
   f: 1,
   q: 1,
   y: 1
}

AmitDiwan

Updated on 18-Sep-2020 09:22:50

• Related Questions & Answers
• Frequency of smaller and larger elements - JavaScript
• Function for counting frequency of space separated elements in JavaScript
• Sorting array according to increasing frequency of elements in JavaScript
• Sorting array based on increasing frequency of elements in JavaScript
• List frequency of elements in Python
• Building frequency map of all the elements in an array JavaScript
• Frequency of elements of one array that appear in another array using JavaScript
• Looping through and getting frequency of all the elements in an array JavaScript
• Count Frequency of Highest Frequent Elements in Python
• Python – Fractional Frequency of elements in List
• Frequency of vowels and consonants in JavaScript
• Python – Restrict Elements Frequency in List
• Find sum of frequency of given elements in the list in Python
• Sorting array of Number by increasing frequency JavaScript
• Program to sort array by increasing frequency of elements in Python