How object equality works in Extendscript?

[meett9325076]

Hello All,

Can someone explain how object equality works in the Premiere Pro?

I am bit confused with following two different outcome

app.project == app.project // returns true
app.projects[0] == app.projects[0] // returns false

Why it behaves differently with same type of object?

Premiere Pro Version: 12.0.0
Extension Type: Panel

Thanks & Regards,
Meet Tank

[e_d_ · Accepted solution]

Hi Meet,

I guess it's because they're fundamentally different. For the lack of better knowledge iI would assume it works like this:

app.project = an object with a set of properties and methods, so if you compare two of those their properties and methods are being checked for equality.

app.projects = an array of "some references". When compared, there is no drilldown (recursion) to check if the reference is identical, it's just "some reference".

So you would always need to check for a specific property (like documentID) to check for equality.

if (app.project.documentID === app.project.documentID) {
    $.writeln ("Project equal"); 
} else {
    $.writeln ("Project NOT equal");
}
if (app.projects[0].documentID === app.project.documentID) {
    $.writeln ("Project equal"); 
} else {
    $.writeln ("Project NOT equal");
}
if (app.projects[0].documentID === app.projects[0].documentID) {
    $.writeln ("Project equal"); 
} else {
    $.writeln ("Project NOT equal");
}

Best,

Erik