ObjectScript Cheat Sheet for Ensemble [Cache]

Action	Code	Alternative way
Call a class method	##class(package.class).method(arguments)	set variable = ##class(package.class).method(arguments)
Call an instance method	do oref.method(arguments)	set variable = oref.method(arguments)
Create a new object	set oref = ##class(package.class).%New()
Open an existing object	set oref = ##class(package.class).%OpenId(id)
Save an object	set status = oref.%Save()
Validate an object without saving	set status = oref.%ValidateObject()
Validate a property without saving	set status = ##class(package.class).PropertyIsValid(oref.Property)
Delete an existing object	set status = ##class(package.class).%DeleteId(id)
Link two objects	set oref1.property = oref2
Clone an object	set clonedOref = oref.%ConstructClone()
Start the SQL shell	do $system.SQL.Shell()	>>go >> SELECTMODE = DISPLAY
Test a class query	do ##class(%ResultSet).RunQuery(class, query)
Create a new standalone array	set arrayOref=##class(%ArrayOfDataTypes).%New()
Insert an element into an array	do oref.arrayProperty.SetAt(value,key)	do arrayOref.SetAt(value,key)
Display an element of an array	do oref.arrayProperty.GetAt(key)	do oref.arrayProperty.GetAt(key)
Display the size of an array	do oref.arrayProperty.Count()	write arrayOref.Count()
Date conversion (external à internal)	set variable = $zdh(“mm/dd/yyyy”)
Date conversion (internal à external)	set variable = $zd(internalDate, format)
Time conversion (external à internal)	set variable = $zth(“hh:mm:ss”)
Time conversion (internal à external)	set variable = $zt(internalTime, format)
Display internal date/time string	write $system.SYS.Horolog()	write $horolog
Display UTC date/time string	write $system.SYS.TimeStamp()
Check if variable exists	write $data(variable)
Return value of variable, or "" if undefined	write $get(variable)
For Loop Syntax	For ControlVariable = StartValue:IncrementAmount:EndValue