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Financial Derivative – Options

In this article by Michael Heydt , author of  Mastering pandas for Finance , we will examine working with options data provided by Yahoo! Finance using pandas. Options are a type of financial derivative and can be very complicated to price and use in investment portfolios. Because of their level of complexity, there have been many books written that are very heavy on the mathematics of options. Our goal will not be to cover the mathematics in detail but to focus on understanding several core concepts in options, retrieving options data from the Internet, manipulating it using pandas, including determining their value, and being able to check the validity of the prices offered in the market.

Practical Dart

This article is written by Martin Sikora , the author of Dart Essentials . This article will focus on the most common features of Dart that you'll use every day for your next Dart project. In this article, we'll look at: Future-Based API, Dart's built-in library for working with asynchronous calls Creating Ajax requests in Dart How packages work in Dart The whole article is intended to be very practical. We'll create a small app that reads a JSON dictionary and lets you search among all the terms in it. To make it more complicated, we'll implement a so-called fuzzy search algorithm, which doesn't search exact matches but the same order of characters instead.

Node.js Fundamentals

This article is written by Krasimir Tsonev , the author of  Node.js By Example . Node.js is one of the most popular JavaScript-driven technologies nowadays. It was created in 2009 by Ryan Dahl and since then, the framework has evolved into a well-developed ecosystem. Its package manager is full of useful modules and developers around the world have started using Node.js in their production environments. In this article, we will learn about the following: Node.js building blocks The main capabilities of the environment The package management of Node.js

Getting Started with NW.js

In this article by Alessandro Benoit , author of the book  NW.js Essentials , we will learn that until a while ago, developing a desktop application that was compatible with the most common operating systems required an enormous amount of expertise, different programming languages, and logics for each platform.

JIRA – an Overview

In this article by Ravi Sagar , author of the book, Mastering JIRA , we get introduced with JIRA and its concepts, applications, and uses. Also, we get introduced with JQL, project reports and the tools used for the reports. Finally, we learn how to import a simple CSV file in JIRA.

Introducing Web Components

In this article by Sandeep Kumar Patel , author of the book Learning Web Component Development , we will learn about the web component specification in detail. Web component is changing the web application development process. It comes with standard and technical features, such as templates, custom elements, Shadow DOM, and HTML Imports. The main topics that we will cover in this article about web component specification are as follows: What are web components? Benefits and challenges of web components The web component architecture Template element HTML Import

Writing a Fully Native Application

In this article written by Sylvain Ratabouil , author of Android NDK Beginner`s Guide - Second Edition , we have breached Android NDK's surface using JNI. But there is much more to find inside! The NDK includes its own set of specific features, one of them being Native Activities . Native activities allow creating applications based only on native code, without a single line of Java. No more JNI! No more references! No more Java!

Less with External Applications and Frameworks

In this article by Bass Jobsen , author of the book  Less Web Development Essentials - Second Edition , we will cover the following topics: WordPress and Less Using Less with the Play framework, AngularJS, Meteor, and Rails

Advanced Indexing and Array Concepts

In this article by Ivan Idris , the author of NumPy Cookbook - Second Edition , we will learn some of NumPy's more advanced and tricky indexing techniques. In this article, we will cover: Installing SciPy Installing PIL Resizing images Comparing views and copies Flipping Lena Fancy indexing Indexing with a list of locations Indexing with booleans Stride tricks for Sudoku Broadcasting arrays Before diving into indexing, we will install the necessary software — SciPy and PIL. Some of the examples in this article will involve manipulating images. In order to do that, we will require the Python Image Library (PIL); but don't worry, instructions and pointers to help you install PIL and other necessary Python software are given throughout the article, when necessary.

Controlling the Movement of a Robot with Legs

In this article by Richard Grimmett , author of the book  Raspberry Pi Robotics Projects - Second Edition , we will add the ability to move the entire project using legs. In this article, you will be introduced to some of the basics of servo motors and to using Raspberry Pi to control the speed and direction of your legged platform. Even though you've learned to make your robot mobile by adding wheels or tracks, these platforms will only work well on smooth, flat surfaces. Often, you'll want your robot to work in environments where the path is not smooth or flat; perhaps, you'll even want your robot to go upstairs or over other barriers. In this article, you'll learn how to attach your board, both mechanically and electrically, to a platform with legs so that your projects can be mobile in many more environments. Robots that can walk! What could be more amazing than this? In this article, we will cover the following topics: Connecting Raspberry Pi to a two-legged mobile platform using a servo motor controller Creating a program in Linux so that you can control the movement of the two-legged mobile platform Making your robot truly mobile by adding voice control

Solving Some Not-so-common vCenter Issues

In this article by Chuck Mills , author of the book  vCenter Troubleshooting , we will review some of the not-so-common vCenter issues that administrators could face while they work with the vSphere environment. The article will cover the following issues and provide the solutions: The vCenter inventory shows no objects after you log in You get the VPXD must be stopped to perform this operation message Removing the vCenter plugins when they are no longer needed

Integrating social media

In this article by Karol Krol , the author of the WordPress 4.x Complete , we will look at how we can integrate our website with social media. We will list some more ways in which you can make your site social media friendly, and also see why you'd want to do that in the first place. Let's start with the why . In this day and age, social media is one of the main drivers of traffic for many sites. Even if you just want to share your content with friends and family, or you have some serious business plans regarding your site, you need to have at least some level of social media integration. Even if you install just simple social media share buttons, you will effectively encourage your visitors to pass on your content to their followers, thus expanding your reach and making your content more popular.

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