reading-notes

Object-Oriented Programming, HTML Tables

Domain

Domain Modeling Domain modeling is the process of creating a conceptual model in code for a specific problem. A model describes the various entities, their attributes and behaviors, as well as the constraints that govern the problem domain. An entity that stores data in properties and encapsulates behaviors in methods is commonly referred to as an object-oriented model.

This is object-oriented programming in JavaScript at its most fundamental level.

  1. The new keyword instantiates (i.e. creates) an object.
  2. The constructor function initializes properties inside that object using the this variable.
  3. The object is stored in a variable for later use.

Generate random numbers To model the random nature of user behavior, you’ll need the help of a random number generator. Fortunately, the JavaScript standard library includes a Math.random() function for just this sort of occasion. ——-

Tables

What’s a Table? A table represents information in a grid format. Examples of tables include financial reports, TV schedules, and sports results.

<table> The <table> element is used to create a table. The contents of the table are written out row by row. <tr> You indicate the start of each row using the opening <tr> tag. (The tr stands for table row.) It is followed by one or more <td> elements (one for each cell in that row). At the end of the row you use a closing </tr> tag. <td> Each cell of a table is represented using a <td> element. (The td stands for table data.) At the end of each cell you use a closing </td> tag.

Table

code

## Functions, Methods, and Objects

WHAT IS A FUNCTION? Functions let you group a series of statements together to perform a specific task. If different parts of a script repeat the same task, you can reuse the function (rather than repeating the same set of st atements).

function

VARIABLE SCOPE The location where you declare a variable will affect where it can be used within your code. If you declare it within a function, it can only be used within that function. This is known as the variable’s scope.

  1. Local variables 2.Global variables

WHAT IS AN OBJECT? Objects group together a set of variables and functions to create a model of a something you would recognize from the real world. In an object, variables and functions take on new names.

obj

###### sources:

  1. domain
  2. HTML Ducket book
  3. Duckett JS Book