How to find sum of integers in a string using JavaScript

Question

I created a function with a regular expression and then iterated over the array by adding the previous total to the next index in the array.

My code isn\'t working. Is m

Answer 1

var patrn = \\D; // this is the regular expression that removes the letters

This is not a valid regular expression in JavaScript.

You are also missing a closing bracket in the end of your code.

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A simpler solution would be to find all integers in the string, to convert them into numbers (e.g. using the + operator) and summing them up (e.g. using a reduce operation).

var str = "12sf0as9d";
var pattern = /\d+/g;
var total = str.match(pattern).reduce(function(prev, num) {
  return prev + +num;
}, 0);

console.log(str.match(pattern)); // ["12", "0", "9"]
console.log(total);              // 21