Dart 開發語言概覽
- A basic Dart program
- Important concepts
- Keywords
- Variables
- Built-in types
- Functions
- Operators
- Control flow statements
- Exceptions
- Classes
- Generics
- Libraries and visibility
- Asynchrony support
- Generators
- Callable classes
- Isolates
- Typedefs
- Metadata
- Comments
A basic Dart program
This content has moved to Introduction to the Dart language.
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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