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Small Overview About Redis?

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What is Redis?

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries.

You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing an element to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set.

Features

  • Transactions
  • Pub/Sub
  • Lua scripting
  • Keys with a limited time-to-live
  • LRU eviction of keys
  • Automatic failover

Redis is written in ANSI C and works in most POSIX systems like Linux, *BSD, OS X without external dependencies. Linux and OS X are the two operating systems where Redis is developed and more tested, and we recommend using Linux for deploying. Redis may work in Solaris-derived systems like SmartOS, but the support is best effort. There is no official support for Windows builds, but Microsoft develops and maintains a Win-64 port of Redis.

Video for Redis Introduction

posted Jan 23, 2017 by Manish Tiwari

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What is Redis?

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries.

Due to its speed and ease-of-use, Redis is a popular choice for Web, Mobile, Gaming, Ad-Tech, and IoT applications that require best-in-class performance. AWS provides Redis support through a fully managed and optimized database service called Amazon ElastiCache for Redis, and also allows customers to run self-managed Redis on AWS EC2.

Main Benefits

  • Blazing fast performance
  • In-memory data structures
  • Versatility and ease-of-use
  • Replication and Persistence
  • Support for your favorite development language​

Redis also supports trivial-to-setup master-slave asynchronous replication, with very fast non-blocking first synchronization, auto-reconnection with partial resynchronization on net split.

Features

  • Transactions
  • Pub/Sub
  • Lua scripting
  • Keys with a limited time-to-live
  • LRU eviction of keys
  • Automatic failover

Redis is written in ANSI C and works in most POSIX systems like Linux, *BSD, OS X without external dependencies. Linux and OS X are the two operating systems where Redis is developed and more tested

Redis may work in Solaris-derived systems like SmartOS, but the support is best effort. There is no official support for Windows builds, but Microsoft develops and maintains a Win-64 port of Redis.

 

Video for getting started with Redis

https://www.youtube.com/watch?v=7W1n_SwTw14​

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What is Macchina?

Macchina is an open source software toolkit for quickly building embedded applications for the Internet of Things that run on Linux-based IoT gateways and devices like the Raspberry Pi, Beaglebone, RED Brick or Galileo/Edison. 

Macchina implements a web-enabled, modular and extensible JavaScript and C++ runtime environment and provides easy to use building blocks that enable applications to talk to various sensors and devices, as well as cloud services.

Rapidly build IoT device applications in JavaScript and/or C++. Reliable and rock-solid, based on industry proven components like the POCO C++ Libraries and the V8 JavaScript engine. Implemented in C++ for maximum efficiency. 

Runs on Embedded Linux devices with as little as 32 MB of RAM, as well as desktop Linux and OS X. Develop and test on desktop machine, then easily deploy to embedded device.

It runs on Linux-based devices, including IoT gateways, industrial computing devices, and prototyping platforms like the Raspberry Pi, Beaglebone and MangOH.

It is based on the POCO C++ Libraries and uses the V8 JavaScript engine.

Video for Macchina 

https://www.youtube.com/watch?v=vhfu38AyMPU​

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Expo apps are React Native apps which contain the Expo SDK. The SDK is a native-and-JS library which provides access to the device's system functionality (things like the camera, contacts, local storage, and other hardware). That means you don't need to use Xcode or Android Studio or write any native code, and it also makes your pure-JS project very portable because it can run in any native environment containing the Expo SDK.

Expo also provides UI components to handle a variety of use-cases that almost all apps will cover but are not baked into React Native core, e.g. icons, blur views, and more.

Finally, the Expo SDK provides access to services which typically are a pain to manage but are required by almost every app. Most popular among these: Expo can manage your Assets for you, it can take care of Push Notifications for you, and it can build native binaries which are ready to deploy to the app store.

Video for Expo CLI

https://www.youtube.com/watch?v=cWZHjuKTg7g

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What is Vue Native?     

Vue Native is a framework to build cross-platform native mobile apps using JavaScript. Vue Native is a mobile framework to build a truly native mobile app using Vue.js. It is designed to connect React Native and Vue.js.

Vue Native is a wrapper around React Native APIs, which allows you to use Vue.js and compose rich mobile User Interface.

Vue is a progressive framework for building user interfaces. Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable. The core library is focused on the view layer only and is easy to pick up and integrate with other libraries or existing projects.​

Features

  • Declarative rendering
  • Two-way binding
  • The goodness of Vue ecosystem
  • Compiles to React Native
  • Completeness of React Native ecosystem

A video for Vue Native 

https://www.youtube.com/watch?v=8e0XHPylhj0

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What is Mezzanine?

Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework, Mezzanine provides a simple yet highly extensible architecture that encourages diving in and hacking on the code. Mezzanine is BSD licensed and supported by a diverse and active community.

In some ways, Mezzanine resembles tools such as Wordpress, providing an intuitive interface for managing pages, blog posts, form data, store products, and other types of content. But Mezzanine is also different. Unlike many other platforms that make extensive use of modules or reusable applications, Mezzanine provides most of its functionality by default. This approach yields a more integrated and efficient platform.

Features

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  • Drag-and-drop page ordering
  • WYSIWYG editing
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  • Drag-and-drop HTML5 forms builder with CSV export
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  • E-commerce / Shopping cart module (Cartridge)
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  • Blog engine
  • Tagging
  • Free Themes, and a Premium Themes Marketplace
  • User accounts and profiles with email verification
  • Translated to over 35 languages
  • Sharing via Facebook or Twitter
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Mezzanine is an open source project managed using both the Git and Mercurial version control systems.

Video for Mezzanine blogging

https://www.youtube.com/watch?v=3I5nrcsy7RI

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What is Jest?

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             Complete and ready to set-up JavaScript testing solution. Works out of the box for any React project.

      2) Instant Feedback 

                Fast interactive watch mode runs only test files related to changed files and is optimized to give signal quickly.

      3) Snapshot Testing

               Capture snapshots of React trees or other serializable values to simplify testing and to analyze how state changes over time.

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NPM and Yarn Command for Installation.

npm install --save-dev jest

yarn add --dev jest

Video for JEST Library

https://www.youtube.com/watch?v=7r4xVDI2vho

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