Tutorial by Topics: o

Passport is a popular authorisation module for node. In simple words it handles all the authorisation requests on your app by users. Passport supports over 300 strategies so that you can easily integrate login with Facebook / Google or any other social network using it. The strategy that we will dis...

Node is a programming language where everything could run on an asynchronous way. Below you could find some examples and the typical things of asynchronous working. doSomething([args], function([argsCB]) { /* do something when done */}); doSomething([args], ([argsCB]) => { /* do something ...

The goal of this topic is to document best practices when asking Apache Spark related questions.

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

Gob is a Go specific serialisation method. it has support for all Go data types except for channels and functions. Gob also encodes the type information into the serialised form, what makes it different from say XML is that it is much more efficient. The inclusion of type information makes encoding...

The branching operation of sed can help control the flow of the program.

Retrolambda is a library which allows to use Java 8 lambda expressions, method references and try-with-resources statements on Java 7, 6 or 5. The Gradle Retrolambda Plug-in allows to integrate Retrolambda into a Gradle based build. This allows for example to use these constructs in an Android appl...

A SparseArray is an alternative for a Map. A Map requires its keys to be objects. The phenomenon of autoboxing occurs when we want to use a primitive int value as key. The compiler automatically converts primitive values to their boxed types (e.g. int to Integer). The difference in memory footprint ...

The fit command can fit a user-defined function to a set of data points (x,y) or (x,y,z), using an implementation of the nonlinear least-squares (NLLS) Marquardt-Levenberg algorithm. Any user-defined variable occurring in the function body may serve as a fit parameter, but the return type of the fu...

Firebase Cloud Messaging (FCM) is a cross-platform messaging solution that lets you reliably deliver messages at no cost. Using FCM, you can notify a client app that new email or other data is available to sync. You can send notification messages to drive user reengagement and retention. For use ca...

Bokeh is a Python interactive visualization library that targets modern web browsers for presentation. Its goal is to provide elegant, concise construction of novel graphics in the style of D3.js, and to extend this capability with high-performance interactivity over very large or streaming datas...

Protractor is made for testing Angular applications. However, it is still possible to test non-angular applications with Protractor if needed.

Currently .Net Core does not include support to send emails like System.Net.Mail from .Net. MailKit project (which is available on nuget) is a nice library for this purpose.

In order for NetSuite to know how to utilize our source code, we need to be able to tell it which functions to call, when to call them, and who to call them for. We accomplish all of these with the Script and Script Deployment records.

Unlike the .NET framework, the Visual Basic for Applications library does not include routines to sort arrays. There are two types of workarounds: 1) implementing a sorting algorithm from scratch, or 2) using sorting routines in other commonly-available libraries.

Package Ada.Text_IO is used for putting text or getting text from files or console.

Xamarin.Android application lifecycle is the same as normal Android app. When talking about lifecycle we need to talk about: Application lifecycle, Activity lifecycle and Fragment lifecycle. In the below I'll try to provide a good description and way of using them. I obtained this documentation fr...

Unlike many languages, Kotlin distinguishes between mutable and immutable collections (lists, sets, maps, etc). Precise control over exactly when collections can be edited is useful for eliminating bugs, and for designing good APIs. listOf, mapOf and setOf returns read-only objects that you ca...