Check null database value

Question

Below is the object returned from backend:

[Object]0: Object Option_Name_0: null Option_Name_1: "me" Option_Name_2: "you" Option_Name_3: "get" Option_Name_4: "no"__proto__: Objectlength: 1__proto__: Array[0]

I am just trying to populate the values into dropdown menu, by removing "null" value.

$.each(e, function(i) {
    $.each(e[i], function(key, val) {
        if (val != 'null') {
            $(".flash_bet_win").append("<option value=" + val + ">" + val + "</option>");

        }

    });
});

But still I see "null" value in dropdown menu. How to fix this?

Are you sure it is a string and not null

epascarello
– epascarello

2015-07-20 16:09:55 +00:00
Commented Jul 20, 2015 at 16:09 — epascarello
– epascarello, Commented Jul 20, 2015 at 16:09
Remove the quotes from around null

JBux
– JBux

2015-07-20 16:09:55 +00:00
Commented Jul 20, 2015 at 16:09 — JBux
– JBux, Commented Jul 20, 2015 at 16:09

Sudhansu Choudhary · Accepted Answer · 2015-07-20 16:18:07Z

2

Check for null not "null",

if(val !== null)
            {
                 $(".flash_bet_win").append("<option value="+val+">"+val+"</option>");

            }

go for a deep comparison (!==) not (!=) as undefined == null would result in truthy value whereas undefined === null would be false

In case you want to check if the value is not null, not undefined or not empty use,

if(val){
    ...... //your code
}

edited Jul 20, 2015 at 16:18

answered Jul 20, 2015 at 16:10

Sudhansu Choudhary

3,3903 gold badges21 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

neilsimp1 · Accepted Answer · 2015-07-20 16:10:37Z

0

In your if statement, you're checking that that it's not equal to string 'null', when you want to check if it's equal to the value null

if(val != null)

Or, even shorter:

if(val)

Does this do the trick?

answered Jul 20, 2015 at 16:10

neilsimp1

1,2791 gold badge12 silver badges25 bronze badges

Collectives™ on Stack Overflow

Check null database value

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related