A basic Dart program

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Important concepts

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Keywords

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Variables

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Default value

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Late variables

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Final and const

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Built-in types

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Numbers

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Strings

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Booleans

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Lists

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Trailing commas

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Spread operator

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Collection operators

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Sets

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Maps

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Runes and grapheme clusters

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Symbols

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Functions

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Parameters

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Named parameters

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Default parameters

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Optional positional parameters

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The main() function

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Functions as first-class objects

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Anonymous functions

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Lexical scope

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Lexical closures

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Testing functions for equality

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Return values

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Operators

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Arithmetic operators

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Equality and relational operators

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Type test operators

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Assignment operators

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Logical operators

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Bitwise and shift operators

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Conditional expressions

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Cascade notation

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Other operators

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Control flow statements

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If and else

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For loops

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While and do-while

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Break and continue

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Switch and case

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Assert

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Exceptions

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Throw

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Catch

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Finally

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Classes

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Using class members

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Using constructors

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Getting an object’s type

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Instance variables

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Constructors

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Initializing formal parameters

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Default constructors

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Constructors aren’t inherited

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Named constructors

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Invoking a non-default superclass constructor

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Super parameters

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Initializer list

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Redirecting constructors

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Constant constructors

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Factory constructors

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Methods

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Instance methods

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Operators

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Getters and setters

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Abstract methods

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Abstract classes

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Implicit interfaces

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Extending a class

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Overriding members

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noSuchMethod()

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Extension methods

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Enumerated types

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Declaring simple enums

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Declaring enhanced enums

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Using enums

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Adding features to a class: mixins

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Class variables and methods

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Static variables

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Static methods

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Generics

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Why use generics?

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Using collection literals

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Using parameterized types with constructors

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Generic collections and the types they contain

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Restricting the parameterized type

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Using generic methods

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Libraries and visibility

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Using libraries

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Specifying a library prefix

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Importing only part of a library

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Lazily loading a library

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The library directive

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Implementing libraries

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Asynchrony support

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Handling Futures

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Declaring async functions

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Handling Streams

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Generators

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Callable classes

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Isolates

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Typedefs

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Metadata

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Comments

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Single-line comments

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Multi-line comments

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Documentation comments

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