Finding property in Object

Question

Imagine this scenario:

var myObject = {
    "1030":{},
    "1059":{}
}

I want to check if 1030 is in that object. How would I do this?

Answer 1

Try hasOwnProperty

if(myObject.hasOwnProperty("1030")) {
    // Do code
}

It's a bit safer than checking if(myObject["1030"]). This will return false, if the value is falsey (false, undefined, null), which may be desirable, but also does not strictly mean it does not exist.