I have a program which inspects every field in a document to see if it an array.

This works fine for:

db.bios.find({$where: "Array.isArray(this.awards)"})
<Returns values>

But not for

db.messages.find({$where: "Array.isArray(this.X-cc)"})
error:

{ "$err" : "ReferenceError: cc is not defined", "code" : 16722 }

If I single-quote the parameter value in isArray it breaks the working use case:

db.bios.find({$where: "Array.isArray('this.awards')"})
<No rows return>

and seems to fix the broken use case:
db.messages.find({$where: "Array.isArray(this.X-cc)"})
<No rows returned instead of an error>

What I'm looking for is a generic solution that can be used in both scenarios.

Thanks,

Brad