Hi, I am making a code that validates user input. The user input are two lists, B and C. The output is list A, which contains all the items that are contained in both B and C. Here is the code:
//CHECK IF USER INPUT MAKES SENSE
Caption("Checking input data...");
col_name_list = dt << get column names( string );
//Check if there are duplicate or missing inputs
//Create a User-Defined Function
ColCheck=Function({main, second}, {duplicate},
(duplicate={}; Show (duplicate);
For (i=1, i<=Nitems(main), i++,
//Check if there are missing columns from user input
If ( !Contains( col_name_list, main[i] ),
Write("WARNING! Column " || main[i] ||" does not exists. Creating data column.");
Caption("WARNING! Column " || main[i] ||" does not exists. Creating data column.");
Wait( 1 );
script1 = "dt<<New Column(\!"" || main[i] ||"\!", numeric, continuous);";
script1 = Eval( Parse( script1 ) );
);
//Check if there are overlap columns between two lists
For (j=1, j<=Nitems(second), j++,
If ( second[j] == main[i],
duplicate=Insert(duplicate,second[j]); Show (duplicate);
);
);
);
)
);
//Quick test to show if function is working
A={}; Show(A);
B={"one", "two", "three"};
C={"four", "five", "three", "two"};
A=ColCheck(B,C);
Show(A);
Here is the output:
A = {};
duplicate = {};
duplicate = {"two"};
duplicate = {"two", "three"};
A = .;
The functions works, as seen from the values of "duplicate" variable. The problem is this: the duplicate content cannot be passed to variable "A". Is there anything wrong with my code?
