nested tours

Special tools and techniques--Nested classesThere is the ability to define a class within a class, which is nested classes, also known as nested types, unlike the local classes described later . Nested classes are most often used to define run classes.Nested classes are independent classes and are basically unrelat

1. Nested classes Define another class within a class, which is called the nested class or the nested type. The reason for introducing such a nested class is that the peripheral class must use the nested class object as the underlying implementation, and the

Reproduced in: http://www.cnblogs.com/charley_yang/archive/2011/04/05/2005897.htmlFirst, nested class defines another class within one class, which we call a nested class (nested Class), or a nested type. The introduction of such a nested class is often due to the fact that

Reference: "Data structure C + + language description" Concept: Nested classes are defined in a class, and classes that define nested classes are called peripheral classes. Nested classes can only be used in peripheral classes. The purpose of defining nested classes is to hide information so that the abstraction of the

Subqueries and nested queries Tags: it A nested query is an external query.A subquery is also a select query inside select that is often referred to as inner queryThe following error example:Select name from [user] where-age The subquery returns more than one value. This is not allowed when subqueries are followed by =,! =, 1. GrammarThe syntax of a subquery is as follows:(S

Oracle nested representation example ---- Nested table: defines a field in a table as a table. The data in this field table is stored in an external table, For example, the data in the next nested table is stored in the required_tab table. ---- Nested tables can effectively replace connections between multiple table

Label: A nested SELECT statement is also called a subquery, and the query result of a SELECT statement can be used as the input value for another statement. A subquery can appear not only in the WHERE clause, but also in the FROM clause, as a temporary table, or in a select list, as a field value. 1, single-row subquery: A single-row subquery refers to a subquery that returns only one row of data. When a subquery result is referenced in the conditiona

Listening to the swing of the lotus leaves on the West Lake Side, listening to the light and sweet osmanthus fragrance coming in advance, riding around the West Lake, yanggongdi and Longjing mountains ...... There is nothing more comfortable than

Linux Tour (1): diff, Patch and quilt (bottom) 2 quiltOur own projects can manage all the code with CVS or SVN. But sometimes we use projects that other developers maintain. We need to change some files, but we cannot submit the code directly to the

How long do your It "blue collar" work every day is lying on the internet? To do a variety of browsing, preservation and paste, has been our subconscious action. That is, the early 2 to improve the efficiency of the small tips, today to share with

The next job is up to you! First find a picture to save to the database, is an UPDATE statement AH! Simple! There is code in the help, although it is SQL Server, I just change it to Oracle on it, just looked,. NET has specifically for Oracle

Oracle table join-nestedloop nested loop joinI. nested loop PrincipleA nested loop connection is a two-layer nested loop that matches two tables in sequence and returns the table join method of the returned result set.In the following SQL statement, tables T1 and T2 are connected through

[Conversion] Class C ++ is nested with the external class and friends.[Turn] http://baike.baidu.com/link? Url = Md223wQoT5s-3cZ5xRnj1pGmvm310DKAuh-HDrcEdc2l24rwobHrdEc_Mi4Z3BGP0jxRqTCBQkRXJoGtuWNS7 _[Reprint] http://www.cnblogs.com/qzhforthelife/archive/2013/07/31/3226885.html1.1 The definition of a nested class is called a nested class in a class body. A class w

Table joins and where to use NESTED loop nested loops join NBSP;NBSP;NBSP;NBSP consists of two for loops. No matter what connection, this algorithm can be used. The two relations of connection are called outer relation and inner layer relation, and the relation of large number of data block is the outer relation and the small relation is the inner layer relation. is divided into block

Nested Functions]JavaScript allows embedded functions that can be used as data. Under the function lexical scope, it can generate an astonishing difference from the traditional object-oriented language.First, JavaScript Functions use lexical division of scopes, rather than dynamic division of scopes. Therefore, functions are run in the scope that defines them, instead of running them in the execution scope, it is easy to understand when

Before looking at the So today I found a time to check the details of the difference between the two, summed up in this blog, not only to facilitate their own review and learning, but also to enlighten others. 1, Concept: A class that is defined within a class, called a "nested class". Nested classes are divided into two types: static and not static. The latter has a special name called "Inner class". S

Nested tables and variable Arrays From: http://www.zhaoyang-db.com.cn Author: (08:02:00) Nested table 1. Definition of nested tables: A

Database Table design. It is not best to have only the most suitable (adjacent table, Path Enumeration, nested set, closure table), enumeration packet tableWhen designing a database, do we break through the general rules and find the most suitable design scheme? The following is an example: A parent_id field will be added to the commonly used adjacent table design, for example, the region table (country, province, city, district ): CREATE TABLE Area (

Maybe everyone has the same concept as me, that is, the function cannot be defined in the function. If someone asks you whether the class can be nested before you understand the nested class, maybe you will say no like me. I recently read c ++ primer and saw Nested classes. There is something I have never understood. record it.

Use of nested fragment and common errorsNested fragments (Nested fragments), fragment is added inside the fragment.When used, the main need to rely on the host fragment getChildFragmentManager() to obtain Fragmentmanger.While it looks similar to adding fragment in the activity, there are a few areas that require special attention because of the fragment life cycle and the management recovery model.This arti