I have this array:

var x = ["happy", "", "sad", ""];

How do I convert it to:

["happy","sad"];

var y = ["happy", ""];

to:

["happy"];

I appreciate your help.

I have this array:

var x = ["happy", "", "sad", ""];

How do I convert it to:

["happy","sad"];

var y = ["happy", ""];

to:

["happy"];

I appreciate your help.

• javascript
• arrays

• In addition to the answers, you could also use array = array.filter(String) - it should filter out empty strings – Ian Commented Aug 26, 2014 at 15:34

3 Answers 3

Like this:

var x = ["happy", "", "sad", ""];
x = x.filter(function(v){
    return v !== "";
});

You can also do return v; but that would also filter out false, null, 0, NaN or anything falsy apart from "".

The above filters out all "" from your array leaving only "happy" and "sad".

Update: String method returns the argument passed to it in it's String representation. So it will return "" for "", which is falsey. SO you can just do

x = x.filter(String);

Use Array.prototype.filter

array = array.filter(function (elem) { return elem; });

You could also do elem !== "" if you don't want to filter out false, null, etc.

For your array you can use simple:

x = x.filter(Boolean);

This would filter also null, undefined, false, 0 values