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最新文章列表
logback配置Level Inheritance
Configuration file example:
<configuration debug="true">
......
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class=&qu ...
class and inheritance
class and inheritance
class Base:
def __init__(self):
self.data = []
def add(self, x):
self.data.append(x)
def addtwice(self, x):
self.add(x)
self.add(x)
# Child extends Bas ...
Item 20: Prefer class hierarchies to tagged classes
1. You may run across a class whose instances come in two or more flavors and contain a tag field indicating the flavor of the instance. (i.e. An Operator class with one field to indicate what operat ...
Chapter 6. Object-Oriented Programming
1.There is a special variable called this. When the function is called as a method (meaning it is looked up as a property and immediately called, as in object.method()), this will point to the releva ...
Item 17: Design and document for inheritance or else prohibit it
1. The class must document precisely the effects of overriding any method. In other words, the class must document its self-use of overridable methods.
2. By convention, a method that invokes o ...
Item 16: Favor composition over inheritance
1. Inheriting from ordinary concrete classes across package boundaries is dangerous.
2. Unlike method invocation, inheritance violates encapsulation. The superclass’s implementation may change ...
flex style的继承顺序
If you define a style in only one place in a document, Flex uses that definition to set a property’s value. However, an application can have several style sheets, local style definitions, external styl ...
提高C#编程水平不可不读的50个要诀
1.总是用属性 (Property) 来代替可访问的数据成员
3.在 as 和 强制类型转换之间,优先使用 as 操作符
5.总是为自定义类重载 ToString 方法
7.使用不可变的值类型(Immutable Atomic Value Types)
9.理解 ReferenceEquals, static Equals, instance Equals 和 比较运算符(==)之间的关系
...
4.4 play with class inheritance in ruby
1.
class Word def palindrome?(string) string == string.reverse endend
in this class, it doesn't indicate superclass explicitly, so the default is inherit from Object class.
sinc ...
SpringMVC 中实体类父子类关系设置
SpringMVC 中实体类父子类关系设置
父类:
@Entity
@Table(name="tbl_AlbumSuper")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
public class AlbumSuperClass {
@Id
@Column(length = 32)
@ ...
Chapter 7. Reusing Classes -- Thinking in Java
1) You have two ways to use the classes without soiling the existing code:
a. you simply create objects of your existing class inside the new class. This is called composition, because the new c ...
Chapter 1. Introduction to Objects -- Thinking in Java
1) All programming languages provide abstractions. It can be argued that the complexity of the problems you’re able to solve is directly related to the kind and quality of abstraction. By “kind” I m ...