count number of occurrences in string array javascript code example
Example 1: javascript Count the occurrences of a value in an array
const countOccurrences = (arr, val) => arr.reduce((a, v) => (v === val ? a + 1 : a), 0);
countOccurrences([2, 1, 3, 3, 2, 3], 2);
countOccurrences(['a', 'b', 'a', 'c', 'a', 'b'], 'a');
Example 2: how do i count the number of occurrences in a string javascript
function charCount(myChar, str) {
let count = 0;
for (let i = 0; i < str.length; i++)
if (str.charAt(i) == myChar)
count++
return count;
}