return largest phone number in JS array

Question

I have to return the largest phone number,not index, from an array in Javascript. I am trying to remove the non digit characters then find largest number. I am new and not e

Answer 1

If you want to use some built in JavaScript functions then you can use the map method of arrays to modify each element of the array, and the Math.max method to find the largest number.

function myFunction(array) {
    var array = array.map(function(elementOfArrayAtIndex) {
        return parseInt(elementOfArrayAtIndex.replace(/\D/g, ''), 10);
    });
    var largest = Math.max.apply(null, array);
    console.log(largest);
}

myFunction(["509 - 111 - 1111", "509 - 222 - 2222", "509 - 333 - 3333"]);

Here's a fiddle http://jsfiddle.net/v3b7gx6L/1/

This is basically what the map method is doing

for(var j = 0; j < array.length; j++) {
  array[j] = array[j].replace(/\D/g, '');  
}