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Here in Stack Overflow we often see duplicates talking about the same errors: "ImportError: No module named '??????', SyntaxError: invalid syntax or NameError: name '???' is not defined. This is an effort to reduce them and to have some documentation to link to.

A more versatile alternative to VLOOKUP. An Index Match packs the power of a Vlookup and Hlookup in one formula. You also do not need to know which number column/row the information is. Due to this, deleting columns/rows will not mess up the formula.

A nice introduction to material and textures. Diffuse, Bump, Specular, and Transparent Textures. ParameterDetailscolorNumeric value of the RGB component of the color.intensityNumeric value of the light's strength/intensity.fovCamera frustum vertical field of view.aspectCamera frustum aspect ra...

Developed in AT&T Bell Labs by Ken Thomson as a single user OS in 1969. Initially written in assembly language Developed as multi-user OS. later rewritten in C in 1973 Licensed to university for educational purposes in 1974 POSIX (Portable Operating System for Unix) was developed

Boxes are a very important part of Rust, and every rustacean should know what they are and how to use them

In this topic you will learn how to extend the Related Entity Description field with a custom entity for Tasks, Events and Activities.

MailboxProcessor maintains an internal message queue, where multiple producers can post messages using various Post method variants. These messages are then retrieved and processed by a single consumer (unless you implement it otherwise) using Retrieve and Scan variants. By default both producing...

To quote from @SnoringFrog's topic-creation request: "One of the biggest gotchas using sed is scripts that fail (or succeed in an unexpected way) because they were written for one and not the other. Simple run-down of the more major differences would be good." macOS uses the BSD ver...

A regular expression is a powerful way of specifying a pattern for a complex search.

Savepoints are "fat", externally stored checkpoints that allow us to resume a stateful flink program after a permanent failure, a cancelation or a code update. Before Flink 1.2 and the introduction of externalized checkpoints, savepoints needed to be triggered explicitly.

If you edit a new file: vim these/directories/dont/exist/newfile, you won't be able to save the file as the directory vim is trying to save into does not exist.

Kotlin has a built-in view injection for Android, allowing to skip manual binding or need for frameworks such as ButterKnife. Some of the advantages are a nicer syntax, better static typing and thus being less error-prone.

Oracle produces a variety of exceptions. You may be surprised how tedious it can be to have your code stop with some unclear message. To improve your PL/SQL code's ability to get fixed easily it is necessary to handle exceptions at the lowest level. Never hide an exception "under the carpet&quo...

iOS 10 gave us UserNotifications.framework, the new API for local/remote notifications. It offers viewing media attachments or responding to messages right from the notification. Notification content consists of: title, subtitle, body and attachment. Attachment can contain images/gifs/videos up t...

Polymorphism is the provision of a single interface to entities of different types. Basically, it allows different data types respond to the same function. So, the same function shapes for different data types to accomplish the same behavior. Elixir language has protocols to implement polymorphism w...

Zxing library is well known for image processing. Zxing was based on java and .Net module is also available and it can be used in xamarin applications. click here to check official documentation. http://zxingnet.codeplex.com/ I recently used this libarry. Step1: Add ZXing.Net.Mobile component int...

This is a polynomial algorithm for getting the minimum vertex cover of connected undirected graph. The time complexity of this algorithm is O(n2) VariableMeaningGInput connected un-directed graphXSet of verticesCFinal set of vertices The first thing you have to do in this algorithm to get al...

A preview of the difference between pug code and the generated markup Pug makes possible to write HTML in a simplest way, using a clean, whitespace sensitive syntax.