Change node properties via Javascript

[streamfan]

I am trying to create a javascript to change a property.

I have tried

doc.removeAspect("cm:subject");
doc.addAspect("cm:subject");

also tried

doc.properties["cm:subject"]="newitem"

Where doc is a document from a lucene search.

How can I change a property using Javascript.

[hsohaib]

doc.properties["cm:subject"] = "something";
doc.save();
‍‍‍‍

given that your document has a cm:subject property