I would like to store array values into a cdt

Question

I would like to store array values into a cdt. For example, I would like to store array values :{{"first name1","Last name1",1},{"first name2","Last name2",2},{"first name5","Last name5",5}} to a cdt with values 
 {FirstName:"first name1", LastName:"Last name1",UserNumber:1}, {FirstName:"first name2", LastName:"Last name2",UserNumber:2}, {FirstName:"first nam5", LastName:"Last name5",UserNumber:5}. 
 
 How can I write function to store a array values of multiple type and store value in a cdt? 
 Thanks

Mike Schmitt · Answer

I assume you mean you're starting with an array of arrays, where every position in the top-level array is a set of data, and every bottom-level array will be [1]: first name, [2]: last name, and [3]: user number. 
 You need to be careful since Appian often refuses to allow easy handling of array-of-arrays, instead treating them as flat arrays, but never really allowing you to see when it's doing one versus the other. So what I'm about to say may or may not work, depending on how the array-of-arrays is being created / passed in. 
 Create a function rule!processUsers: 
 {
 FirstName: ri!array[1],
 LastName: ri!array[2],
 UserNumber: ri!array[3]
} 
 Then you call this from elsewhere, when you have your array-of-arrays as above: 
 apply(
 rule!processUsers( array: _ ),
 local!myArrayOfArrays
) 
 This should hopefully return an array of 'Dictionary' matching / mapping to the CDT properties you are wanting.