Given ri!name is 'Maria' and ri!directory is a list of maps including Maria and setven, what is the expected output of the expression whereContains( ri!name, index(ri!directory, 'name') )?

Given ri!name is 'Maria' and ri!directory is a list of maps including Maria and setven, what is the expected output of the expression whereContains( ri!name, index(ri!directory, 'name') )?

• A. True
• B. False
• C. Null
• D. Error

Answer: (A)

You’re testing how to check if a specific name appears in the set of names pulled from a list of records. ri!directory is a list of maps where each map includes a name field, such as Maria and Setven. The expression index(ri!directory, 'name') collects the values of the name field from every map in the list, giving something like ['Maria', 'Setven']. Then whereContains( ri!name, index(ri!directory, 'name') ) checks whether the left-side string, Maria, is contained in that collection of names. Since Maria is indeed one of the names in the directory, the expression evaluates to True.

You’re testing how to check if a specific name appears in the set of names pulled from a list of records. ri!directory is a list of maps where each map includes a name field, such as Maria and Setven. The expression index(ri!directory, 'name') collects the values of the name field from every map in the list, giving something like ['Maria', 'Setven']. Then whereContains( ri!name, index(ri!directory, 'name') ) checks whether the left-side string, Maria, is contained in that collection of names. Since Maria is indeed one of the names in the directory, the expression evaluates to True.