Tutorial by Topics

In order to utilize a JDBC datasource, we must first set up a JNDI reference in Tomcat. After the JNDI reference is made, JDBC datasources can be used within our Tomcat server and applications using shared or independent references (Great for dev/staging/prod setup, or removing connection strings/cr...

Firebase database is a NoSQL database that stores its data in the form of hierarchal JSON objects. There are no tables or records of any form as an SQL database would normally have, just nodes that make up a key-value structure. Data Normalization In order to have a properly designed database stru...

Calculated Properties in Powershell are custom derived(Calculated) properties. It lets the user to format a certain property in a way he want it to be. The calculation(expression) can be a quite possibly anything.

There are two types of procedures in Progress ABL: internal procedures and procedure prototypes that are facades to Windows dlls or Unix/Linux shared library procedures. Just like with functions, procedures cannot be nested. You cannot nest functions in procedures and vice versa. A procedure is ca...

If you use the objects in other applications as part of your Visual Basic application, you may want to establish a reference to the object libraries of those applications. This Documentation provides a list, sources and examples of how to use libraries of different softwares, like Windows Shell, Int...

Code that compiles can still run into errors, at run-time. This topic lists the most common ones, their causes, and how to avoid them.

AWS Lambda is a service that lets you run back-end code without the need to provision or manage servers. AWS Lambda takes care of scaling and high availability. The cost directly depends on how often and how long your code executes. You will find examples of how to create and deploy AWS Lambda func...

Groovy's HTTP Client usage, examples and pitfalls.

The Rules module is an engine which allows site administrators to automate actions to be conditionally executed, either programmatically or in response to predetermined events. Rules can react to Rules Events occurring on a Drupal site, such as a user logging in. And it can perform customized follo...

Html helpers are a very useful way of creating html elements in views using MVC framework. With a bit of time your team can really benefit from using them. It helps with keeping the code clean and error prone. To use the helpers you need to first add a @using directive inside the view, or add ...

A stack trace is a great aid when debugging a program. You will get a stack trace when your program throws an Exception, and sometimes when the program terminates abnormally.

This section provides an overview of what django-forms is, and why a developer might want to use it. It should also mention any large subjects within django-forms, and link out to the related topics. Since the Documentation for django-forms is new, you may need to create initial versions of tho...

This section provides an overview of what flexbox is, and why a developer might want to use it. It should also mention any large subjects within flexbox, and link out to the related topics. Since the Documentation for flexbox is new, you may need to create initial versions of those related topi...

Django ModelForm enables the creation of a Form class from a Django model.

Django is shipped with several views that require forms. These forms are, naturally, built-in. A good example are Authentication Built-in forms. This topic intends to bring documentation on how to work with these forms.

One core feature of Django is unit tests. This topic intends to bring a complete documentation on how to test forms.

This is a simple example demonstrating how to create a drop down menu in the Active Sheet of your workbook by inserting a Combo Box Activex object in the sheet. You'll be able to insert one of five Jimi Hendrix songs in any activated cell of the sheet and be able to clear it, accordingly.

This section provides an overview of what jq is, and why a developer might want to use it. It should also mention any large subjects within jq, and link out to the related topics. Since the Documentation for jq is new, you may need to create initial versions of those related topics.

Scrollbars can be added to Listbox, Canvas, and Text widgets. In addition, Entry widgets can be scrolled horizontally. To be able to scroll other type of widgets, you need to put them inside a Canvas or a Text widget. scrollbar = tk.Scrollbar(parent, **kwargs) ParameterDescriptionparentt...