How to use Map In Javascript

In this method, JavaScript map is used so that we can store the result in thje form of key-value pairs where key is the chars used and value will be the number of occurrences.

Example: In this example, we will iterate the given string and store result in the form of key-value pairs.

Javascript

let str = 'w3wiki'

let result = new Map()
for(let i = 0;i< str.length;i++){
  let ch = str.charAt(i)
  if (!result.get(ch)) result.set(ch, 1);
    else {
        result.set(ch, result.get(ch) + 1);
    }
}
console.log(result)
// console.log(
    // "The occurrence of each letter in given 
    // string is:",result)

Output

Map(7) {
  'G' => 2,
  'e' => 4,
  'k' => 2,
  's' => 2,
  'f' => 1,
  'o' => 1,
  'r' => 1
}

JavaScript Program to Count the Occurrences of Each Character

This article will demonstrate different approaches for implementing a JavaScript program to count the occurrences of each character in a string. We will be given a string as input and we return the chars used with the number it occurred in that string.

How to use Map In Javascript

JavaScript Program to Count the Occurrences of Each Character

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