Troubling removing string in Javascript array

Question

I am having trouble understanding what to do next. The following code removes all the duplicate numbers but I also need to remove the strings without converting them to numbers. I'm not sure how to proceed...

var arr = [ 10, 44, 55 ,66 , 77 , 55 , 44 , 3 , 3 , 3 , 4 , 5 , 6 , 54 , "henry", "33", "£", "66"]
var max = {};
function biggerThanMax(arr){
    return arr.filter(function(item,index){
        return arr.indexOf(item) >= index;
    });
};
biggerThanMax(arr)

What should the output be? It's still a little bit vague what you want to achieve. By "remove the strings", do you mean remove all strings, or just the ones that are duplicates of an already existing number? — ibrahim mahrir
– ibrahim mahrir, Commented Sep 3, 2018 at 15:46

sid-m · Accepted Answer · 2018-09-03 15:41:04Z

1

use typeof x to check the type of variable x

answered Sep 3, 2018 at 15:41

sid-m

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Adrian · Accepted Answer · 2018-09-03 15:43:58Z

1

You want to use typeof

var arr = [
  10, 44, 55, 66, 77, 55, 44,
  3, 3, 3, 4, 5, 6, 54,
  "henry", "33", "£", "66"
]
var max = {};

function biggerThanMax(arr) {
  return arr.filter(function(item, index) {
    return typeof item == 'number' && arr.indexOf(item) >= index;
  });
};
console.log(biggerThanMax(arr))

You also have a couple of typos (which are likely a typo in your example)

Unclosed array
Missing biggerThanMax opening bracket.

edited Sep 3, 2018 at 15:43

answered Sep 3, 2018 at 15:41

Adrian

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