Caché ObjectScript Reference - InterSystems Documentation

Caché ObjectScript Commandswas created. By default, a SET assigns a global in the current namespace. You can use SETto define a global (^myglobal) in another namespace (samples) by using syntax such as thefollowing: SET ^[“samples”]myglobal="Ansel Adams”.A variable can be a piece or segment of a variable as specified in the argument of a $PIECEor $EXTRACT function.Note that you can assign values to only certain special variables. See the reference pages forindividual special variables for further details.valueA literal value or any valid Caché ObjectScript expression. Usually a value is a numeric orstring expression.• A numeric value is converted to canonical form before assignment: leading and trailingzeros, a plus sign or a trailing decimal point are removed. Any exponentiation or specifiedarithmetic operations are performed.• A string value is enclosed in quotation marks. A string is assigned unchanged, exceptthat doubled quotation marks within the string are converted to a single quotation mark.The null string ("") is a valid value.• A numeric value enclosed in quotation marks is not converted to canonical form and noarithmetic operations are performed before assignment.• If a relational or logical expression is used, Caché assigns the truth value (0 or 1) resultingfrom the expression.• Object properties and object methods that return a value are valid expressions. Use the.. syntax for assigning a property or method value to a variable.ExamplesThe following example illustrates how you can specify multiple arguments for the same SETcommand. Specifically, the command assigns values to three variables. note that argumentsare evaluated in left-to-right order.SET var1=12,var2=var1*3,var3=var1+var2WRITE "var1=",var1,!,"var2=",var2,!,"var3=",var3The following example shows the (variable-list)=value form of the SET command. Itshows how to assign the same value to multiple variables. Specifically, the command assignsthe value 0 to three variables.SET (sum,count,average)=0WRITE "sum=",sum,!,"count=",count,!,"average=",average128 Caché ObjectScript Reference