Is using the Js delete operator to remove a property from an object considered bad practice? [closed]

Question

When removing a property from an object, I've used the delete operator in the past. But when I had my code reviewed by a person with a CS background, they wanted me to find another way of removing the property because it was an "expensive" task (not sure what that means). Since I'm self taught I wanted to ask if deleting in Js is something I should consider using as last resort? I've looked at other responses within SO like this but couldn't find anything that makes reference to this.

Answer 1

No, it's not considered bad practice. It just depends on what you want to do,

Read this thread: Garbage Collection and JavaScript "delete": Is this overkill/obfuscation, or a good practice?

Answer 2

The book "JavaScript, the Good Parts" by Douglas CrockFord says...

The delete operator can be used to remove a property from an object. It will remove a property from the object if it has one. It will not touch any of the objects in the proto- type linkage.

I think you can use the Delete operator without worries. There are many other ways to remove a property from an object, but all they are more expensive in my opinion.