Need to remove string from an Array

Question

I have an array inside a for loop like this:

var arr = ["abc", "5", "city", "2", "area", "2", "max", "choice"];

And I need only number like this:

var arr = ["5","2","2"];

So can someone please help here.

Answer 1

Another approach by using a converted number to a string and compare with the original value.

var array = ["abc", "5", "city", "2", "area", "2", "max", "choice"],
    result = array.filter(v => (+v).toString() === v);

console.log(result);

Just shorter approach with isFinite

var array = ["abc", "5", "city", "2", "area", "2", "max", "choice"],
    result = array.filter(isFinite);

console.log(result);

While tagged with underscore.js, you could use the filtering and callback from underscore.

var array = ["abc", "5", "city", "2", "area", "2", "max", "choice"],
    result = _.filter(array, _.isFinite);

console.log(result);

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