Returns a list of the object properties that have been changed but not yet saved to the database.
changedProperties() <!--- Get an object, change it, and then ask for its changes (will return a list of the property names that have changed, not the values themselves) --->
<cfset member = model("member").findByKey(params.memberId)>
<cfset member.firstName = params.newFirstName>
<cfset member.email = params.newEmail>
<cfset changedProperties = member.changedProperties()>