Delete empty keys instead of setting to undefined

[jamilbk]

When a serialized form is passed in with blank fields, remove the inputs that are empty. This will prevent Rails from trying to assign these fields to empty strings or nil.

[chrissrogers]

I am concerned that this assumed coercion would be dangerous. Deleting the key is equivalent to stating that it is not present; however, in the case you are citing, it is. Setting the value to undefined in coercion cases is more akin to what is going on in the serialized string. The key is present and accounted for, but its value is undefined.

May I suggest in your case that you perform the deletion separately, in order to achieve the feature compatibility you want with rails?

[yscumc]

I think it actually makes more sense for the value to be null if there was no equal sign. For example, I'd expect the following code to return an object with var1 = null, even without coerce, since it indicates there was no value passed.

>>> $.deparam("var1&var2=&var3=test")
Object { var3="test", var1="", var2=""}