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Operator Type: 

Operator Scope of Action: 

Operator Purpose: 

Operator First Added: 

Operator Last Altered: 

 Function  [other Function type actions]

 Item  [operators of similar scope]

 Query Boolean  [other Query Boolean operators]


 As at baseline


The expression:


is true if the dictionary contains the designated key.

Dictionaries are case-sensitive, but Dictionary.icontains(key) is available for case-insensitive matching.