View source for Documentation:OCLOperators collect

{{Edited|July|12|2025}} 

The <code>collect</code> operator iterates over a collection and '''returns a new collection''' containing the results of applying an expression to each element. 

Unlike <code>foreach</code>, <code>collect</code> is a '''pure OCL operator''' and does '''not modify state'''.

Syntax
 collection->collect(item | expression)
Execution Context

ViewModels,Constraints, Debugger → Evaluate Expression,Debugger → Execute Action

<code>collect</code> is '''not''' an EAL operator.
Examples
 Customer.allInstances->collect(c | c.Name)
Returns a list of customer names.

Collect derived values
 Customer.allInstances->collect(c | c.Age + 1)
Returns a list where each element is the customer’s age plus one.
[[Category:Intermediate-Friendly]]
[[Category:OCL (Object Constraint Language)]]
[[Category:OCL Operators: Collection Navigation]]
[[Category:Priority 50]]