Tutorial by Topics

A Pair is one of the most basic data type in scheme. It is also usually called cons cells.

COMMMENT main purpose is to define or change a comment on database object. Only a single comment(string) can be given on any database object.COMMENT will help us to know what for the particular database object has been defined whats its actual purpose is. The rule for COMMENT ON ROLE is that you m...

As the name implies, vector drawables are based on vector graphics. Vector graphics are a way of describing graphical elements using geometric shapes. This lets you create a drawable based on an XML vector graphic. Now there is no need to design different size image for mdpi, hdpi, xhdpi and etc. W...

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

The data.table package has undergone a number of changes and innovations over time. Here are some potential pitfalls that can help users looking at legacy code or reviewing old blog posts.

A notorious common question is "how to send notifications from device to device", sadly the answer is: you can't. FCM needs to be triggered in order to send push notifications. That can be done in 3 different ways: Directly in the Firebase web console Setting a Firebase Functions li...

C++, like C, has a long and varied history regarding compilation workflows and build processes. Today, C++ has various popular build systems that are used to compile programs, sometimes for multiple platforms within one build system. Here, a few build systems will be reviewed and analyzed. Current...

Examples on how to save the created Excel sheet to the Disk or send it to the Browser.

Java objects which are created by web container.There are 9 implicit objects | object | Type | | ---------- | ------------------ | | out | JspWriter | | request | HttpServletRequest | | response | HttpServletResponse| | config | ServletConfig | | app...

This document covers TCP/IP networking, network administration and system configuration basics. Linux can support multiple network devices. The device names are numbered and begin at zero and count upwards. For example, a computer with two NICs will have two devices labeled eth0 and eth1.

When you receive an error: "Microsoft Access has encountered a problem and needs to close", there is often not a lot of information to help you identify the cause of the error. Below are a series of steps you can take to troubleshoot the cause of the errors. Be sure to remove other vari...

Pyglet is a Python module used for visuals and sound. It has no dependencies on other modules. See [pyglet.org][1] for the official information. [1]: http://pyglet.org

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

What is the difference between a listener and a visitor? The difference between listener and visitor mechanisms is listener methods are called by the ANTLR-provided walker object, whereas visitor methods must walk their children with explicit visit calls. Forgetting to invoke visit() on a node’s chi...

This Simple Google App Web Script (Standalone) allows Google Drive to be repeated polled for files to be downloaded to the user's local PC. Shows how to use one app script to provide the function of both the: 1. User interface (a simple one in this example) 2. The file download page. For a fu...

This topic will introduce you to some of the basic cmdlets used within the Active Directory Module for PowerShell, for manipulating Users, Groups, Computers and Objects. Please remember that PowerShell's Help System is one of the best resources you can possibly utilize. Get-Help Get-ADUser -Full...