Axapta collection classes in ax 2012

Axapta collection classes 

Axapta has several collection classess:

• List
• Container
• Array
• Map

List

declare as class member variable

public class AdjustVendTables

{

    List list;

}

Iniitalize in the new method

void new()

{

    ;

    list = new List(Types::Integer);

}

Loop with the ListIterator

ListIterator:- The ListIterator loop through the Complete List.

ListEnumerator:- List Enumerator class is like list iterator class ,but allows the deletion of element during Enumeration and list itereator does not.

    ListIterator  literator;

    literator = new ListIterator (list);

    while (literator.more())

    {

        print literator.value();

        literator.next();

    }

Container

A container is not a reference type but a value type ( keep in mind). A container contains an ordered sequence of primitive values or other containers. A container is helpful when you must pass a variety of value types between the client and server tiers. A container is a poor choice when you intend to repeatedly add to a list in a loop.

Example:

    container con2;

    int int4;

    str str7;

    ;

    con2 = ["11", 222];

    [int4, str7] = con2;

• There are several function for working with containers:
• conDel
• conIns
• conPoke
• conPeek

Array

Arrays can be used for all types but Tables and Classes

// A dynamic array of integers

int i[];

// A fixed-length real array with 100 elements

real r[100];

// A dynamic array of dates with only 10 elements in memory

date d[,10];

// A fixed length array of NoYes variables with 100 elements

// and 10 in memory

noYes e[100,10];

Map

Map is a key-value collection, the x++ equivalent of a dictionairy:
example: