containsKey()

You can use the dictionary.containsKey() function to find out whether a specified string is a key in the dictionary. If the caseSensitive dictionary property is set to NO, case is not considered; otherwise, the function seeks an exact match.

Use containsKey() in a logical expression only.

Syntax

  dictionaryName.containsKey(key STRING in) 
  returns (result BOOLEAN)
dictionaryName
The name of a variable based on a Dictionary part.
key
The name portion of a name/value pair.
result
The function returns YES or TRUE if the key exists in the dictionary; otherwise it returns NO or FALSE.

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