postgres enum type

Original: http://z515256164.blog.163.com/blog/static/32443029201192182854300/Have changedC-language explanation-enum typeNote: The following all code execution Environment is VC + + 6.0In a program, you might need to define an alias for some integers, and we can do this with the preprocessing directive # define, and your code might be:#define MON 1#define TUE 2#define WED 3#define THU 4#define FRI 5#define SAT 6#define SUN 7Here, we define a new

Original Enum type enum (for value type) in C #C # supports two special types of values: enumerations and structs.Declare enumeration: Declare all possible values when declaring. Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Namespace Enumtype {

The most recent mapping of an enumeration type with Hibernate is that in the MySQL database, if you do not configure the type of the enumerated types property in the Hibernate map file, hibernate maps the enum type to the Tinyblob type by default. This is very embarrassing,

When I recently discussed the issue with my colleagues, my colleague suddenly mentioned why the constant values defined in Java do not take the ENMU enumeration type and are defined by the public final static type. We used to be defined in this way, rarely using the enum definition, so also did not pay attention to, in the face of the problem, it is still a littl

Simple IntroductionEnum types in Java are defined by the keyword enum, a new type from jdk1.5, and all enum types inherit from the enum type. To understand enumeration types, we recommend that you first open the enum class in the

This article only discusses how to define a more readable Enum in solidmcp, which is also a side effect of cracking clean code and readable code. -- Piaoger > Several methods for defining Enum In fact, the main difference between these forms is: Whether the enum definition is placed in a nested Enum

The enum enum type of Java finally appeared in j2se1.5. Before thought it was just a chicken, dispensable. After all these years, without it, don't everyone have a good one? Today, "Thinking in Java" 4th edition, there is a sentence "sometimes precisely because of it, you can" elegant and clean "to solve the problem. Elegance and clarity are important, formally d

An explanation of the enumeration types in Java:Simple example: Public enum color{ red,blue,black,yellow,green } Complex examples (with custom construction methods and types) Public enumenumtest {FRANK ("The given name of me"), LIU ("The family name of Me"); PrivateString context; PrivateString GetContext () {return This. Context; } PrivateEnumtest (String context) { This. Context =context; } Public Static voidMain (string[] args) { f

specifies that the integer has an initial value of 100 and returns an address to that storage spaceNew CHAR[10]; Opens a space for storing character arrays (including 10 elements) and returns the first address.New Int[5][4]; Opens a space that holds a two-dimensional integer array (size 5*4), returning the address of the first element.Float *p=new float (3.141592); Open a space for storing single precision, and specify that the real number of the initial value is 3.141593, the returned space ad

Android.widget.LinearLayout; public class Linearlayouttest extends activity { @Override public void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate); Setcontentview (r.layout.linearlayout_test); LinearLayout one = (linearlayout) Findviewbyid (r.id.linearlayout_test_1); One.setorientation (2012); LinearLayout two = (linearlayout) Findviewbyid (r.id.linearlayout_test_2); Two.setorientation (Integer.max_value); LinearLayout three = (linearlayout) Findviewbyid (r

In the actual development, in the database table design, we tend to use an int type state field to represent the status of the data, this field is convenient to represent the state of the data, but do not want to build a foreign key table of the state field to explain the status. (There may be a lot of fields for this type of table state, just for example)We typically use this state field as a convention to

Tag: Sep How ber mem val Class A blog pythonEnum type Enum is an important data type, which is a data type rather than a structure, and we usually declare a common set of constants as enumerated types for easy follow-up use. When there are several possible values for a variable, we define it as an enumeration

If you need several possible values for a variable, you can be defined as an enumeration type. An enumeration is called a possible value for a variable or an object that may be present, one by one cases are lifted out. Let me give you an example to illustrate, to make it more clear, for example, there is a pen in a pencil box, but you do not know what it is before you open it, it may be a pencil or a pen, there are two possibilities, then you can def

An enumeration type, the Enum keyword, was added to Java SE5. Before this, when you need to create a set of shaped constants, but these enumerated values do not necessarily limit their own values within the range of the constant set, so it is not safe to do so, and it is not easy to use. Now that we have an enum, we have solved the above problem.Although an

Enum typeAn enumeration type (enumeration) is a derived data type in C + +, which is a collection of user-defined enumeration constants.If a variable has only a few possible values, it can be defined as an enumeration (enumeration) type. The so-called "enumeration" refers to the value of the variable is enumerated, the

Enum typeAn enumeration type (enumeration) is a derived data type in C + +, which is a collection of user-defined enumeration constants.If a variable has only a few possible values, it can be defined as an enumeration (enumeration) type. The so-called "enumeration" refers to the value of the variable is enumerated, the

Js Author: Junsan Jin Date: 2005-03-25 E-mail: junsan21@126.com; Junnef21@sohu.com There are many new features in Jsdk5.0, such as generics, enhanced loops, improved loading, unboxing, static introduction, and so on, which greatly enhances the ease of use of the Java language. I am now doing a project from the COM + (DCOM) platform to the Java EE platform for porting there are many definitions of enumerated types, which used to be introduced into the third party class library, or write

_name: _type _name; enum _name: _type #if (__cplusplus) #define Ns_options (_type, _name) _type _name; enum: _type #else #define Ns_options (_type, _name) enum _name: _type _name; enum _name: _type #endif #else #define Ns_enum (_type, _name) _type _name; ENUM