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Pokémon Go: A Developer’s Perspective

Solve App Problems 10x Faster with AppDynamics – Monitor production apps at code-level depth with minimal overhead. Start a FREE Trial! Every app developer dreams of the kind of success that Pokémon Go is enjoying right now. A month ago, it was just a rumor. Just 24 hours after it was released, it was the number one top grossing app, ...

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AngularJS Unit Testing With Karma and Jasmine

One of the benefits of using AngularJS is that it is designed with testability in mind. Having integrated unit testing can help prevent bugs as projects grow in complexity and the number of developers. It also provides new devs with documentation on how to use existing code. In my last article, I explained how to use Test-Driven Development (TDD) to ...

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Building a Remote Caching System

Last month, our engineering team shipped a large update to how Docker images are cached and stored when using Jet, our Docker platform. In this post, we’ll discuss the motivation for the update, the design and implementation of the feature, and cover some of the tricky engineering problems we faced. What Is Image Caching Anyway? Building a service with Docker ...

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Autoscaling: Its Purpose and Strategies

In my previous article, “Autoscaling on Complex Telemetry”, we discussed a method for determining effective autoscaled cluster size from internal application metrics. That article assumed you wanted to autoscale and so did not discuss under what conditions you might choose to, let alone what your choices for scaling are. Let’s go ahead and delve into all that here. This article ...

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Running Services within a Docker Swarm

When Docker released its latest version, Docker Engine v1.12, it included quite a few changes to the capabilities provided by Docker Swarm. In today’s article, we’ll be exploring how to deploy a service using Docker’s Swarm Mode. Activating Swarm Mode on Ubuntu 16.04 Before we can deploy a service on a Docker Engine Swarm, we will first need to set ...

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The Need for Speed in Web Applications

Often, web applications are slower than we would like them to be. Companies like Google and Facebook have in-house solutions for speeding up their applications. There is a need for a third-party tool that we developers can use to achieve something similar, without needing to spend hours to optimize the code and the database. The last couple of months, I ...

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PHP Send Email Example

E-mail(electronic mail) has become an integral part of the internet. Approximately all tech savy people have an email address. If you have a facebook account, you sure have registered it with an email address. E-mails are simply messages that can contain text, attachments and they are sent through a computer network to individuals or groups of individuals. In this example ...

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Instance-Level Properties in Python

Making Descriptors that act as specialized properties can be tricky, especially when it comes to storing the data the property controls. I should know, I literally wrote the book. Looking at how other languages do it – especially Kotlin’s Delegated Properties – I felt that Python could use a system that works more like that. Delegated Properties are simply objects ...

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