count occurrences of character in string javascript
var temp = "This is a string.";
var count = (temp.match(/is/g) || []).length;
console.log(count);
Output: 2
Explaination : The g in the regular expression (short for global) says to search the whole string rather than just find the first occurrence. This matches 'is' twice.count value a to b character javascript
const recorrences = ['a', 'b', 'c', 'a', 'b','a']
.map(i => !!~i.indexOf('a'))
.filter(i => i)
.length;
console.log(`recorrences ${recorrences}`)
//recorrences 3Copyright © 2021 Codeinu
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