Question

How to find the number of occurrences (frequency) of each character in a string with Node.js

Answer 1

function character_occurrences(s) { 
    const TOTLAASCII = 256; 
    let arr = new Array(TOTLAASCII).fill(0);
    
    const len = s.length; 
    for (let i = 0; i < len; i++) {
        arr[s[i].charCodeAt(0)]++; 
    }
  
    for (let i = 1; i < TOTLAASCII; i++) { 
        if (arr[i] > 0) {
            console.log(String.fromCharCode(i) + " - " + arr[i]);
        }
    } 
} 
        
const s = "node.jsc++phpcpythonc#"; 
            
character_occurrences(s); 
   
   
   
      
      
/*
run:
      
# - 1
+ - 2
. - 1
c - 3
d - 1
e - 1
h - 2
j - 1
n - 2
o - 2
p - 3
s - 1
t - 1
y - 1
      
*/

 

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