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  • How to distinguish between require and include in php

    How to distinguish between require and include in php

    The difference between require and include in PHP: 1. require is unconditional. If require is added during the process, it will be executed first regardless of whether it is established. 2. Include has a return value, but require does not. 3. Require synt
    2022-05-23
  • What are the differences between get and post in php

    What are the differences between get and post in php

    The difference between get and post in php: 1. GET generates one TCP data packet, and POST generates two TCP data packets. 2. GET requests can only be URL encoded, while POST supports multiple encoding methods. 3. When the browser returns, GET is harmless
    2022-05-23
  • The difference between double quotes and single quotes in php

    The difference between double quotes and single quotes in php

    The difference between double quotes and single quotes in php: 1. Double quotes interpret variables, while single quotes do not interpret variables. 2. Insert single quotes within double quotes. If there are variables in single quotes, interpret the varia
    2022-05-23
  • The difference between Redis and Memcached in php

    The difference between Redis and Memcached in php

    The difference between Redis and Memcached in php: 1. Redis is a memory database. Memcache can also cache photos. 2. Redis can create nosql database, news queue, etc. Memcache can also cache SQL statements.
    2022-05-23
  • Introduction to php factory pattern

    Introduction to php factory pattern

    Introduction to PHP factory mode: 1. The factory mode solves how to create instance objects without using new. 2. There are some ways to create targets other than new. 2. Usually used with interfaces, the application does not need to know the specific det
    2022-05-23
  • What are the interview questions in java arrays

    What are the interview questions in java arrays

    Java array interview questions: Array is an independent module in Java. The knowledge points in it have formed a complete knowledge structure. In the actual inspection, it will involve discussion of variables, actual application of algorithms, etc. When r
    2022-05-23
  • What are the ORM frameworks in Java?

    What are the ORM frameworks in Java?

    ORM framework in Java: Mainly Hiberante is an object-oriented ORM, Mybatis is a semi-automatic ORM, Bee specifically describes the advantages of Hiberante and Mybatis, IBATIS is a persistence layer framework, JOOQ is a Java class library for complex SQL,
    2022-05-23
  • Environment configuration of Hibernate in java

    Environment configuration of Hibernate in java

    Hibernate environment configuration in java: 1. Mapping configuration, find the relevant files in the core jar package of Hibernate, and copy them to Customer.hbm.xml; 2. Core configuration, find the files in the core jar package of Hibernate, and copy th
    2022-05-23
  • Construction of java Spring framework

    Construction of java Spring framework

    Building the java Spring framework: 1. Configure the web.xml file; 2. Configure the applicationContext.xml file; 3. Create a new Controller file; 4. Put the jar package into the WEB-INF/lib folder; 5. Add the project to tomcat .
    2022-05-23
  • Detailed explanation of Spring framework download in java

    Detailed explanation of Spring framework download in java

    Steps to download the Spring framework in java: 1. Find the official website download address; 2. Download springsource-tool-suite; 3. Install springsource-tool-suite; 4. Keep clicking "Next" and finally "Finish". Wait for it to instal
    2022-05-23
  • Application of java type erasure

    Application of java type erasure

    If the type parameters are unrestricted, all type parameters in the generic type are replaced by their bounds or objects. Insert type conversions when necessary to maintain type safety. To maintain polymorphism in extended generic types, bridge methods ar
    2022-05-21
  • Java wildcard usage rules

    Java wildcard usage rules

    Rules for using java wildcards: 1. Define in variables and use upper limit wildcards. 2. Use the super keyword and the lower limit wildcard to define the out variable. 3. If the In variable can be accessed using methods defined in the Object class, use un
    2022-05-21
  • How to use lower bound wildcard in java

    How to use lower bound wildcard in java

    Usage of Java lower bound wildcard: 1. Lower bound wildcard restricts unknown types to specific types or super types. 2. The lower bound wildcard uses the wildcard character ('?'). 3. The class instantiated under the wildcard must be the current c
    2022-05-21
  • How to understand php singleton mode

    How to understand php singleton mode

    Understanding of PHP singleton mode: 1. The singleton mode is very useful when you need to ensure that there is only one instance of an object. By giving control of object creation to a single point, only one instance of the application exists at any time
    2022-05-21
  • What is php short connection

    What is php short connection

    Introduction to PHP short connections: 1. Short connections generally only communicate read and write operations between the client and the server. Short connection management is simple. The existing connections are useful connections and do not require a
    2022-05-21
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