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Yii2 has some built-in validators which can be used while solving programming related or general puprose validations. When you need to create a new business logic validation you need to create your own validators.

Whenever you work with video feeds you may eventually want to save your image processing result in a form of a new video file. For simple video outputs you can use the OpenCV built-in VideoWriter class, designed for this. It is useful to look at some concepts before using them. These concepts are co...

Composite lets clients treat individual objects and compositions of objects uniformly. For example consider a program that manipulates a file system. Files are simple objects and folders are composition of files and folders. However, for example, they both have size, name etc. functions. It would be...

This thread is focused on how to create a spring boot application with hibernate and thymyleaf template engine. Also check the Thymeleaf documentation

In this post I will demonstrate how to pass external data to Angular app before the app bootstraps. This external data could be configuration data, legacy data, server rendered etc.

What is Dynamic Method Dispatch? Dynamic Method Dispatch is a process in which the call to an overridden method is resolved at runtime rather than at compile-time. When an overridden method is called by a reference, Java determines which version of that method to execute based on the type of object...

Proguard is free Java class file shrinker, optimizer, obfuscator, and preverifier. It detects and removes unused classes, fields, methods, and attributes. It optimizes bytecode and removes unused instructions. It renames the remaining classes, fields, and methods using short meaningless names. ...

Elastic Beanstalk is a Cloud PaaS provider (Platform as a Service), meaning applications can be deployed to the platform without the fuss of manually setting up a deployment environment. Java applications are easily deployable to Elastic Beanstalk both via web interface or via command-line tools. ...

This function returns all categories as an array of the current post or page or the designated post or page. get_the_category( $id ) ParameterDetails$id(int) (Optional) default to current post ID. The post ID. Please note that get_the_category() returns an array, which means that you c...

A good explanation of this topic is in http://www.sunburst-design.com/papers/CummingsSNUG1999SJ_SynthMismatch.pdf

SQL injection is a code injection technique, used to attack data-driven applications, in which nefarious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker). In this section we will talk about that and its relation with JDBC Statement. ...

Pagination is a common issue with for a lot of mobile apps that need to deal with lists of data. Most of the mobile apps are now starting to take up the "endless page" model, where scrolling automatically loads in new content. CWAC Endless Adapter makes it really easy to use this pattern i...

In this topic you will learn how to create, edit, copy, move, and delete files in batch.

Sql script to delete test data of products, customers, logs and sales.

Get magento store and website related data

Custom Attributes for sales, category, etc.

A linkage specification tells the compiler to compile declarations in a way that allows them to be linked together with declarations written in another language, such as C. extern string-literal { declaration-seq(opt) } extern string-literal declaration The standard requires all compil...