JavaScript Count characters case insensitive

We are given a string and are required to write a function that returns the frequency of each character in the array. And we should not take the case of characters into consideration.

To do this the best way would be iterating over the string and preparing an object with key as characters and their frequency as value.

The code for doing this will be −

Example

const string = 'ASASSSASAsaasaBBBASvcdNNSASASxxzccxcv';
const countFrequency = str => {
   const frequency = {};
   for(char of str.toLowerCase()){
      if(!frequency[char]){
         frequency[char] = 1;
      }else{
         frequency[char]++;
      };
   };
   return frequency;
};
console.log(countFrequency(string));

Output

The output of the above code in the console will be −

{ a: 10, s: 11, b: 3, v: 2, c: 4, d: 1, n: 2, x: 3, z: 1 }

AmitDiwan

Published on 19-Aug-2020 07:24:42

• Related Questions & Answers
• JavaScript Check for case insensitive values?
• How to use case-insensitive switch-case in JavaScript?
• MySQL case-insensitive DISTINCT?
• Case-insensitive Dictionary in C#
• Case insensitive search in Mongo?
• How to perform Case Insensitive matching with JavaScript RegExp?
• Case-insensitive string comparison in C++
• MongoDB query with case insensitive search?
• JavaScript filter an array of strings, matching case insensitive substring?
• Perform case insensitive SELECT using MySQL IN()?
• MongoDB query for specific case insensitive search
• How to do case insensitive string comparison of strings in JavaScript
• How to make jQuery attribute selector case insensitive?
• How to perform case-insensitive search in Oracle?
• How to achieve case sensitive uniqueness and case insensitive search in MySQL?