OCL Collection Operators
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    [[File:Collection of objects operators.png|frameless|453x453px|link=https://wiki.mdriven.net/index.php/File:Collection_of_objects_operators.png]]
    [[File:Collection of objects operators.png|frameless|453x453px|link=https://wiki.mdriven.net/index.php/File:Collection_of_objects_operators.png]]
    {| class="wikitable"
    !Operators
    !Description
    |-
    |'''[[OCLOperators append|->append]]'''
    |Add another object last
    |-
    |'''[[OCLOperators asBag|->asBag]]'''
    |Returns a Bag containing all elements of ''self''.
    |-
    |'''[[OCLOperators asSequence|->asSequence]]'''
    |Returns a Sequence containing all elements of ''self''. Element ordering is preserved when possible.
    |-
    |'''[[OCLOperators asSet|->asSet]]'''
    |Returns a Set containing all elements of ''self''.
    |-
    |'''[[OCLOperators at|->at]]'''
    |Get the objects at X where the first index is 1
    |-
    |'''[[OCLOperators at0|->at0]]'''
    |Get the objects at X where the first index is 0
    |-
    |'''[[OCLOperators collect|->collect]]'''
    |Returns a collection containing the result of applying ''expr'' on all elements contained in ''self''.
    |-
    |'''[[OCLOperators count|->count]]'''
    |Count how many meet a certain criteria
    |-
    |[[OCLOperators dictionary|'''->dictionary''']]
    |Efficiently looks up values
    |-
    |'''[[OCLOperators difference|->difference]]'''
    |The difference between 2 collections
    |-
    |'''[[OCLOperators excluding|->excluding]]'''
    |The collection except for this single object
    |-
    |'''[[OCLOperators exists|->exists]]'''
    |Returns true if at least one element in ''self'' validates the condition ''expr'', false otherwise.
    |-
    |'''[[OCLOperators filterOnType|->filterOnType]]'''
    |Only keep the ones of a certain type
    |-
    |'''[[OCLOperators first|->first]]'''
    |Return the first object
    |-
    |'''[[OCLOperators forAll|->forAll]]'''
    |Returns true if all the elements contained in ''self'' validate the condition ''expr'', false otherwise.
    |-
    |'''[[OCLOperators groupBy|->groupBy]]'''
    |Build a collection of tuples grouped by some aspect
    |-
    |'''[[OCLOperators includes|->includes]]'''
    |Does the collection include the object
    |-
    |'''[[OCLOperators includesAll|->includesAll]]'''
    |Does the collection include the whole other collection
    |-
    |'''[[OCLOperators including|->including]]'''
    |Returns the list with the element in the parameter included.
    |-
    |'''[[OCLOperators indexOf|->IndexOf]]'''
    |The 1 based index of an object in the collection possibly -1 if not existing
    |-
    |'''[[OCLOperators indexOf0|->indexOf0]]'''
    |The 0 based index of an object in the collection possibly -1 if not existing
    |-
    |'''[[OCLOperators intersection|->intersection]]'''
    |The intersection of two collections
    |-
    |'''[[OCLOperators isEmpty|->isEmpty]]'''
    |Returns true if the collection is empty
    |-
    |'''[[OCLOperators notEmpty|->]][[OCLOperators notEmpty|notEmpty]]'''
    |Returns true if ''self'' contains at least one element, false otherwise.
    |-
    |'''[[OCLOperators reject|->]][[OCLOperators reject|reject]]'''
    |Returns a collection with all elements of ''self'' except for those who validate the OclExpression ''expr''.
    |-
    |'''[[OCLOperators select|->]][[OCLOperators select|select]]'''
    |Returns a collection with all elements of ''self'' that validate the OclExpression ''expr''.
    |-
    |'''[[OCLOperators size|->]][[OCLOperators size|size]]'''
    |Returns the number of elements contained in ''self''.
    |-
    |'''[[OCLOperators sum|->]][[OCLOperators sum|sum]]'''
    |Returns the sum of all elements contained in ''self'' if they support the '+' operation.
    |-
    |'''[[OCLOperators last|->last]]'''
    |Returns the last object in the collection
    |-
    |'''[[OCLOperators orderBy|->orderBy]]'''
    |Sorts the collection on one or more properties
    |-
    |'''[[OCLOperators orderDescending|->orderDescending]]'''
    |Sort the from biggest to smallest
    |-
    |'''[[OCLOperators orderGeneric|->orderGeneric]]'''
    |Sorts the list of properties with interchangeable sort order: (expr1, OclSortDirection::ascending, expr2, OclSortDirection::descending...)
    |-
    |'''[[OCLOperators prepend|->prepend]]'''
    |Returns an OrderedSet containing ''object'' followed by all elements of ''self''.
    |-
    |'''[[OCLOperators subSequence|->subsequence]]'''
    |Returns a smaller collection from a start to stop
    |-
    |'''[[OCLOperators symmetricDifference|->symmetricDifference]]'''
    |The symmetric difference between the collections; ie all the objects in collection1 or collection2 but not in both
    |-
    |'''[[OCLOperators union|->union]]'''
    |The set of objects in collection1 and objects in collection2
    |}


    See this page for [[Documentation:Examples on collection operators|examples on collection operators.]]
    See this page for [[Documentation:Examples on collection operators|examples on collection operators.]]


    Also check out: [[Documentation:OCLOperators|OCLOperators]]
    '''Also check out:''' [[Documentation:OCLOperators|OCLOperators]]

    Latest revision as of 05:00, 10 March 2025

    This page was created by Stephanie@mdriven.net on 2023-04-12. Last edited by Stephanie@mdriven.net on 2025-03-10.

    Once you have a collection of objects, there are certain operators applicable to them.

    You can use the OCL-Editor to see what they are:

    Collection of objects operators.png

    See this page for examples on collection operators.

    Also check out: OCLOperators

    Pages in category "OCL Collection Operators"

    The following 41 pages are in this category, out of 41 total.

    E

    O

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