Tuto WEBDEV 25

Part 13: The WLanguage basics 423 Javascript Programming language that is used by the browsers to perform calculations and processes in an HTML page (on the computer of Web user). Key (file) Characteristics of a data file item. A key item is used to optimize the searches and the sorts in a data file. Synonym: index. Link (analysis) Used to describe the nature of relationship or the common point between 2 analysis data files. The integrity rules to write to the relevant data files can be defined depending on the specified link. Live Data Mechanism that consists in displaying real data coming from the database when creating the GUI. This mechanism is used only if the element is linked to the data file. Local (variable or procedure) Corresponds to the scope in memory of a variable or procedure. A local element can only be accessed in the process where it was defined. The opposite is global. Member Variable belonging to a class or structure. Method Procedure belonging to a class used to act on the class data (members). Native access (connector) Method for connecting to a database from a program. n-tier Programming method in layers. Each layer is independent and it can be changed without impacting the other ones. Benefit: Simplified maintenance. Drawbacks: Difficulty and development time. Object-Oriented Programming (OOP) Advanced programming method, opposed to procedural programming. In OOP, we handle objects, which means grouped sets of variables and methods associated with entities that include these variables and these methods. In procedural programming, we define functions that call each others. Each function or procedure is associated with a specific process that can be divided into sub-processes until we get basic functions.