Remove all falsy values from an array

Question

I would like to remove all falsy values from an array. Falsy values in JavaScript are false, null, 0, \"\", undefined, and NaN.

Answer 1

You use isNaN() in wrong way. It should be something like following:

function bouncer(arr) {
   return arr.filter(function (n) { 
       return n !== undefined && n !== null && n !== false && n !== 0 && n !== "" && !isNaN(n); 
   });

}

Also you can rewrite it:

function bouncer( arr ){
    return arr.filter( function( value ){
        return value;
    });
}