$Case Function
The $Case function evaluates an expression (its first argument), and returns the result that corresponds to the value of the expression (the rest of the arguments). The last argument can be a default result, returned if no other argument value matches the expression.
VS Code - ObjectScript
/// examples for ObjectScript Tutorial Class ObjectScript.Examples { ClassMethod Celebrate() { write !, "Yippee! I won!" } ClassMethod Complain() { write !, "Oh well, I lost." } }
$Case can return literals, as shown in the first example, or it can return names of class methods, as in the second example.
Testing using the Terminal
USER>set survivor = 3 USER>write $case(survivor, 1:"Rich", 2:"Kelly", 3:"Rudy", 4:"Sue", :"") Rudy USER>do $case(survivor, 1:##class(ObjectScript.Examples).Celebrate() , :##class(ObjectScript.Examples).Complain() ) Oh well, I lost. USER>set survivor = 1 USER>do $case(survivor, 1:##class(ObjectScript.Examples).Celebrate() , :##class(ObjectScript.Examples).Complain() ) Yippee! I won! USER>
