jQuery function returns undefined on callback [duplicate]

Question

I've put together a little javascript file which uses a clean framework, here's how it's formatted:

var functionLibrary = {

    validateFields:function(inputArray, result) {
        $.each(inputArray, function(index, listItem) {
            if (!$.trim($("#" + listItem).val()).length) {
                return "empty";
            }   
        });
    }

}

Here's me passing data to such function and getting an undefined when validating the response:

var Validation = functionLibrary.validateFields(['amount', 'ppemail']);
console.log(Validation);

Why does such function show undefined in the console log when it should be returning empty ?

the validateFields is not returning anything... the each callback is returning the value — Arun P Johny
– Arun P Johny, Commented Sep 2, 2014 at 12:31
The each is not returning for validateFields. Try to put a console.log before the end of validateFields to check if the function didn't return "empty" yet. — bzeaman
– bzeaman, Commented Sep 2, 2014 at 12:33

Arun P Johny · Accepted Answer · 2014-09-02 12:32:48Z

2

You are not returning anything from the validateFields method...

var functionLibrary = {

    validateFields: function (inputArray, result) {
        var value;
        $.each(inputArray, function (index, listItem) {
            if (!$.trim($("#" + listItem).val()).length) {
                //set the validity status
                value = "empty";
                //stop further execution of the loop
                return false;
            }
        });
        //return the value from validateFields
        return value;
    }

}

answered Sep 2, 2014 at 12:32

Arun P Johny

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