The Ultimate Flutter Course (عربى)

فى هذا الدرس سوف نتعرف على

• statements

• expressions

فى هذا الدرس سوف نتعلم عن المتغيرات وايضا سوف نتعرف على

• type annotation

• type safety

• explicitly

• dynamic

• type inference

• assignment operator =

• identifiers

فى هذ الدرس سوف نتعلم

• difference between variables and constants

• const and final

The benefit of using const is it gives the compiler the freedom to make internal optimizations to the code before compiling it.

فى هذا الدرس سوف نتعلم

• How to use meaningful variable names

• good variables name

• bad variables name

• lowerCamelCase

Every type in Dart is a subtype of Object, and as a subtype, shares Object’s basic functionality

int

double

num

dynamic

String

In this lecture we will learn about type conversion

• Implicit Conversion (not supported in dart)

• Explicit Conversion

  
  

  .Experience shows implicit conversion is a frequent source of software bugs and often hurts code performance.
  

In this lecture we will learn about

• Operators with mixed types

• Ensuring a certain type

• Casting Down

فى هذا  الدرس سوف نتعرف على التالى

• How computers represent strings

• character set

• two-way mapping

• Unicode

• code point

• UTF-16 code units

• surrogate pairs

• runes

In this lecture we will learn the following about String in dart programming language

• Single-quotes vs. double-quotes

• string literals

• escape character

• Interpolation

In this lecture we will learn

• Interpolation

• Multi-line strings

• new line \n

• raw string

• Inserting characters from their codes

In this lecture you will learn about

• Why String is immutable

• Stack and Heap

• Garbage Collector

• StringBuffer

In this lecture we will learn the following

• dynamically typed

• statically typed

• optionally typed

• Object and dynamic

In this lecture you will learn

• Addition(+)

• Subtraction(-)

• Divide(/)

• Multiplication(*)

• Modulus(%)

• Division(~/)

In this lecture you will learn about

• Increment Operators

  • Prefix Operator ++Variable

  • Postfix Operator Variable++

• Decrement Operators

  • Prefix Operator --Variable

  • Postfix Operator Variable--

In this lecture we will learn about

• >  Greater than

• < Less than

• >= Greater than or equal to

• <= Less than or equal to

• == Equal to

• != Not equal

In this lecture we will talk about

• && Logical AND

• || Logical OR

• ! Logical NOT

In this lecture we will talk about control flow

• Conditional Control Flow

• Looping Control Flow

In this lecture we will talk about

1. global variable

2. local variable

3. block variable

In this lecture we will talk about

• Enumerated Types

• Enum values and indexes
  

In this lecture we will learn about

• while loop

• iteration

• infinite loop

In this lecture you will learn about

• Do-while loops

• Comparing while and do-while loops

• Breaking out of a loop

In this lecture you will learn

• for loop

• C-style for loop

• convert while loop to for loop

• initialization

• condition

• action

• The continue keyword

In this lecture we will talk about

• For-in loops

• Collections

• Anonymous function or Callback function

• Arrow function Syntax

In this lecture we will learn how to solve Fibonacci sequence

In this lecture you will learn about

• what is a function

• Don't repeat yourself (DRY)

• Clean code

• function declaration

• function calling

In this lecture we will talk about

• Return type

• Function name

• Parameters

• Return value

• function signature

• function body

• parameter and argument

In this lecture we will learn about

• Using multiple parameters

• Positional parameters

• Making parameters optional

• Providing default values

In this lecture you will learn about

• Named Parameters

• Named Parameters and clean code

• Making named parameters required

• 
  

In this lecture we will learn about

• Writing good functions

• Writing DRY Code

• Avoiding side effects

In this lecture you will learn

• function should only doing one thing

• Single Responsibility Principle

• Choosing good names

• Use noun phrases for pure functions

• Use verb phrases for functions with side effects

• Don’t repeat parameter names in the function name

In this lecture you will learn about:

• Named functions and Anonymous functions

• First-class citizens

• Assigning functions to variables

In this lecture you will learn

• Passing functions to functions

• Returning functions from functions

In this lecture you will learn about

• Arrow functions

• arrow syntax or arrow notation

In this lecture you will learn about

• Procedural Programming

• Object Oriented Programming

• Class = Blueprint

• Object = Instance

• instantiation = creation of objects

• Constructor

In this lecture you will learn about:

• Dart classes

• class data = state

• Functions = Methods = Behavior

• Defining a class

• Creating an object from a class

• instantiating a class

• The optional keyword new

• Assigning values to properties

• Printing an object

In this lecture you will learn

• Introduction to Inheritance in Dart

• Super class and Subclass

• Method Overriding

• @ annotations

  
  

In this lecture you will learn

• Serialization

• Deserialization

• Standardized Serialization formats

• JSON

In this lecture you will Adding a JSON serialization method to our class

Cascade notation allows you to chain together multiple assignments on the same object without having to repeat the object name.

In this lecture you will learn about

• What is a constructor

• Default constructor

• Constructor parameters

In this lecture you will learn about

• Custom Constructor

• this keyword

• shadowing

• Long-form Constructor

• Short-form Constructor

In this lecture you will learn about:

• Unnamed Constructors

• Named constructors

• Forwarding constructors or Redirecting constructors

In this lecture you will learn about:

• Optional Parameters

• Optional and Named Parameters

• Named and Required Parameters

In this lecture you will learn

• Object Oriented Programming pillars

• Encapsulation

• Inheritance

• Polymorphism

• Abstraction

• private data = fields

• public data = properties

• Initializer list

In this lecture you will learn

• private data = fields

• getters

• setters

In this lecture you will learn about

• Constant constructors

• Making properties immutable

• Making classes immutable

• Benefits of using const

• canonical instances

A factory constructor provides more flexibility in how you create your objects. A generative constructor can only create a new instance of the class itself. However, factory constructors can return existing instances of the class

Singletons are a common design pattern where there is only ever one instance of an object.

In this lecture you will learn

• Null overview

• What null means

• The problem with null

• Nullable vs. non-nullable types

Dart gives you a whole set of tools called null aware operators that can help you handle potentially null values. Here they are in

brief:

• If-null operator (??)

• Null-aware assignment operator (??=)

• Null-aware access operator (?.)

• Null-aware method invocation operator (?.)

• Null assertion operator (!)

• Null-aware cascade operator (?..)

• Null-aware index operator (?[])

• Null-aware spread operator (...?)

Null aware assignment operator used when you have a single variable that you want to update if its

value is null

In this lecture you will learn about:

• null-aware access operator

• null-aware method invocation operator

null assertion operator (!), = bang operator

• Null-aware index operator (?[])

• Null-aware spread operator (...?)

In this lecture you will learn about Initializing non-nullable fields using one of the following methods

• Using initializers

• Using initializing formals

• Using an initializer list

• Using default parameter values

• Required named parameters

In this lecture you will learn:

• Using late keyword

• Dangers of being late

• Benefits of being lazy

• lazy initialization