2.2 Get started with development using X++ in finance and operations apps Flashcards
X++ differences from other languages?
Strong data access statements
Tight integration with system and user metadata
A strong extensibility story with pre/post event handlers and CoC
Case insensitivity
Date data type?
Contains the day, month, and year
Enums data type?
Named list of literals, stored in DB as enum values
GUID data type?
Global unique identifier, unique across all computers and networks
Int data type?
32-bit wide integer signed numbers that do not include decimal place, no support for unsigned integer types
Int64 data type?
A larger, signed integer data type
Real data type?
Number values with decimals
Str data type?
Contains values that are a string of characters
Time of day data type?
Integer value that represents the number of seconds that passed since midnight
UTCDatetime data type?
Combination of date and time of day
Arrays composite data type?
Contains a list of items that have the same data type
Dynamic arrays are open and fixed-length arrays specify a certain length
Containers composite data type?
Dynamic collections of primitive items or other containers
Pass different types of values, not ideal when used in processes that frequently change size or contents
Classes composite data type?
Used to declare an instance of class within a method
Delegates composite data type?
Can be defined on a method, table, form, query.
When delegate is called it also calls subscriber methods.
Delegates never return a value
Tables composite data type?
Can be used to declare instance of a table
Once declared data can be manipulated
Why use EDTs?
Make code easier to read
Set properties on EDT that all instances of that type use
Create hierarchies for EDTs so an EDT can inherit the properties of a parent
Variables?
Identifiers that designate a storage location where a value of data type is stored
Contains different scopes; global and local
Global variable scope?
Can be used throughout the instance of the class
Local variable scope?
Only available within the scope of the class
Operators?
Used to compute values
Types include;
assignment operators,
arithmetic operators,
relational operator
Assignment operators?
Can change the value of the variable or a field
Arithmetic operators?
Used to make numeric calculations
Relational operators?
Compare the values between variable values of similar types
How to determine the visibility of the variables?
By using three modifiers;
public
private
protected
Public modifier?
Makes the variable usable anywhere
Private modifier?
Makes the variable only usable within the class that is defined in
Protected modifier?
Makes the variable only usable within the class that is defined in and any subclass of that class
Types of methods?
Instance methods (object methods)
Static methods (class methods)
Instance methods?
Embedded in the project that was created from a class. The object must be instantiated before you can use the method
Static methods?
Don’t need to instantiate an object to use the methods.
Must have keyword “static”
Basic SQL statements in SQL?
Select
insert_recordset
update_recordset
delete
Select statement?
Used to choose what data will be retrieved based on conditions given
insert_recordset?
Can insert multiple records by copying the records from one table and inserting them into another
update_recordset?
Updated multiple records at the same time
delete statement?
Removes an existing record from the table
X++ runtime functions?
Business operations
Container operations
Conversions
Date operations
Mathematical operations
Reflection operations
Session operations
String operations
Business operations?
Enter financial data and calculate financial formulas
Container operations?
Run functions to manipulate the container data type
Conversions?
Convert data from one type to another
Date operations?
Manipulate date data type
Mathematical operations?
Used to perform additional calculations
Reflection operations?
Access an object’s metadata and return other metadata for the object
Session operations?
Change or report current user connection to F&O apps
String operations?
Manipulate string data type
