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Testing Code Examples in Documentation

In my last post, I covered how to improve the written component of your documentation with automated spell-checking and suggestions for better writing. In this post, I’ll cover the code component of good documentation; trying an example and finding it doesn’t work is a sure-fire way to annoy a reader. The techniques for testing code fall into two distinct camps, ...

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AngularJs 2 Series: Custom Event Binding

Introduction In one of the previous article on databinding, I demonstrated the use of native event binding like button click. Here in this article I will show you how to create your own custom event and listen on to it. We will create a component with a custom event that will emit or send some data and another component will ...

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Docker Remove Container Example

This example will show how to remove Docker containers, that is, instances of images. For this, we will be using the rm command, along with other options, for making the removal more flexible. For this example, Linux Mint 18 and Docker version 1.12.1 have been used.             Tip You may skip Docker installation and jump ...

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AngularJs 2 Series: Custom Property Binding

Introduction In one of the previous article on databinding, I demonstrated the use of native property and event binding. Here I will show you how you can achieve custom property binding. Custom property binding is all about creating your own property and binding a value to it from outside or another component. We will create a component with a custom ...

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HTML Email Validation Example

Sometimes we might have to create web apps that collect user data e.g names, date of birth, username, emails or even the user phone number. It is one thing to collect user data, its another thing to make sure that the user has entered valid information.                   For example we should always ...

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Are You Hard to Convince?

When discussing a new technology, I’m rarely the first one to jump on the bandwagon. In fact, I’m usually the killjoy that ends up arguing against using a new library or a new language feature when the enthusiasm is high and everybody is eager to get started. It’s not that I want to stay comfortable and never move forward. Rather, ...

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How to build a chrome extension

Chrome extensions allow you to add a new functionality to Chrome without having any knowledge about the actual browser source code. New extensions can be implemented using HTML, CSS and JavaScript. In the following example, we implement a word counter extension which helps to count characters, words, syllables and sentences of a selected text in the page. It also calculates the Flesch ...

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Writing a Rails Feature – Blow by Blow

My favorite part of seeing someone live code is all the mistakes they make, but not because I’m a mean awful person who likes to see others fail. Watching others recover from mistakes helps me recover from my mistakes. It also makes me feel better when I see that they mess up the same ways that I do. Too often, ...

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HTML5 Canvas Example

In this example we are going to learn about HTML5 canvas. Canvas was added to HTML in HTML5. HTML5 canvas is a powerful tool (or container) that is used for drawing images and shapes. For this example we will use: A computer with a modern browser installed notepad++         1. What Is HTML/HTML5 HTML is an abbreviation ...

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