Documentation:OCLOperators indexOf: Difference between revisions

OCLOperators indexOf

Revision as of 09:50, 2 October 2024

This page was created by Alexandra on 2017-08-13. Last edited by Edgar on 2025-01-20.

indexOf ( object : T ) : Integer

Returns the position of object in sequence self.

Expression	Result
Sequence{'a', 'b'}->indexOf('a')	0

The zero-based index of an object in the collection is possibly -1 if nonexistent.

(note that probably the specification says that this should be 1-based and not 0-based as it is. This makes it a confusing to use the at(int)-operator that IS 1 based.

We have introduced a IndexOf0:int that explicitly is zero based to better sit with the explicit zero based at0(int))

We recommend you use IndexOf0 and at0 operators over IndexOf and at

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 |}
 The zero-based index of an object in the collection is possibly -1 if nonexistent.
+(note that probably the specification says that this should be 1-based and not 0-based as it is. This makes it a confusing to use the at(int)-operator that IS 1 based.
+We have introduced a IndexOf0:int that explicitly is zero based to better sit with the explicit zero based at0(int))
+We recommend you use [[Documentation:OCLOperators indexOf0|IndexOf0]] and [[Documentation:OCLOperators at0|at0]] operators over IndexOf and at
 [[Category:OCL Collection Operators]]
 {{Edited|July|12|2024}}