set name

1. Extract Class (refining Class) Motivation) A class should be a clear abstract to deal with some clear responsibilities. However, in actual work, the class will continue to grow and expand. This class will become too complex, and soon the class

An indexer allows an instance of a class or struct to be indexed in the same way as an array, with an indexer similar to an attribute, unlike an indexer whose access is a parameter.Indexer and Array Comparisons:(1) The indexer has an unrestricted

--Create a data table that defines the structure of the stored Data information table--CREATE TABLE t_student (Name text, age integer, Phoneno text);--Deleting a data table is usually used when you don't need to use a table , which is rarely used in

1 Overview InnoDB automatically detects deadlocks. If a deadlock occurs, InnoDB rolls back the transaction with a relatively small weight. In fact, there are two types of deadlocks in InnoDB: Real inter-transaction cyclic wait. During

SQL Server trigger instance details, SQL trigger Microsoft SQL Server™2000 provides two main mechanisms to force business rules and data integrity: Constraints and triggers. A trigger is a special type of stored procedure, which is different from

an indexer (Indexer) is a new class member introduced by C # that makes an object in a class as easy and intuitive to reference as an array. Indexers are very similar to properties, but indexers can have parameter lists and only work on instance

SQL Server trigger and SQL Server triggerSQL Server triggers A trigger is a special type of stored procedure, which is different from the stored procedure we introduced earlier. A trigger is triggered by an event and automatically called for

Redis persistence and redis persistence Redis has two persistence Methods: Snapshot (RDBFiles) and append files (AOFFile) RDB persistence is used to save a data snapshot at a specific interval. The AOF (Append only file) Persistence method

1. Preface Recently, I have been studying MongoDB. I have learned a lot about data modification and complicated commands. So I will summarize some frequently used modification commands in this blog to facilitate future study. 2. Command Summary 1).

Objective C # Principle 17: minimum packing and unpackingItem 17: Minimize boxing and unboxing The value type is the data container, and they are not too many. On the other hand, the. NET Framework is designed as a single inherited reference type,

Objective C # Principle 24: Declarative Programming instead of imperative Programming Item 24: prefer declarative to imperative Programming Compared with imperative programming, Declarative Programming can describe software behavior in a simpler

You can specify the returning statement in the DML Statement of oracle. The use of returning statements can simplify PL/SQL programming in many cases. It is not intended to explain the use of the returning statement (in fact, it is very simple to

Instance 1. Obtain the MYSQL versionInstall mysql in windows for python Development Download the EXE Installation File in MySQL-python Windows Copy codeThe Code is as follows: #-*-coding: UTF-8 -*- # Install mysql db for pythonImport MySQLdb as mdb

In the previous article, we talked about the basic definition of SQL stored procedures, how to create and use them. This article describes how to use variables. Variable: local variable and global variable The local variable starts with @ and the

Summary of the sort sorting function in php-redis, php-redissort Many people regard redis as a database. In fact, redis is used to construct the database model, which has the taste of the database. However, the relationship between key and value is

Analysis on the solution of creating and last updating timestamp fields in MySQL, mysql FieldBefore writing this article, clarify my MySQL version. mysql> SELECT VERSION();+------------+| VERSION() |+------------+| 5.5.29-log |+------------+1 row

An indexer allows an instance of a class or struct to be indexed in the same way as an array, with an indexer similar to an attribute, unlike an indexer whose access is a parameter.Indexer and Array Comparisons:(1) The indexer has an unrestricted

This article introduces various code instances and details such as Python operations on MYSQL, execution of SQL statements, obtaining result sets, traversing result sets, obtaining a field, obtaining the table field name, inserting images into the

In Linux, you can write iptables rules to filter data packets in and out of the Linux host to improve the security of the Linux host to a certain extent. in the new kernel version, the recent module is added. This module can collect statistics about

Now let us uncover the mysterious veil of YII2 's most basic class object.php class (he is the ancestor of all classes)!Directory location is base/object.phpPHP/** * @linkhttp://www.yiiframework.com/* @copyright Copyright (c) Yii software LLC *