I've been working at CarGurus.com for the last 2 years or so. One of the biggest journeys we've been undertaking is to take accessibility far more seriously. However with an engineering team way into the triple digits it gets harder and harder to scale accessibility knowledge.
Measuring, Visualizing and Debugging your React Redux Reselect performance bottlenecks
Exploring the dotnet cli
Now that dotnet core tools have been released I thought it would be good to look into the dotnet cli. This is a new command line interface to build, manage, compile and run
dotnet core based applications
StatsN a modern statsd client for dotnet core, and dotnet 4.5
tl;dr click here
When we talk about capturing metrics in applications. One server/service that constantly is in all conversations monitoring, is statsd. Incase you have never heard of it, statsd is a udp/tcp server that you send your in-code metrics to. These metrics get aggregated by statsd, and are forwarded to various backends. Some backends are services like librato or sumologic. Other times you are sending metrics to time series databases such as graphite or god forbid influxdb.
This boils down to in code you can say "log whenever this block of code is hit" or say "measure how long this function takes to execute". These stories come together to form pretty graphs, and rich alerts. All of this enabled by statsd.
Parsing cli arguments in dotnet core Console App
tl;dr view this gist
So its 2016, and we are still making console apps/cli's. In fact I would say there has been a surge in popularity of these types of tools. I think we have come to the realization that buttons on forms are not automatable, and that the command line doesn't have to be scary.
I recently started writing an app in dotnet core, which is the new runtime for dotnet. In the past I have often used command line parser, but as of this writing it does not support core.
I was really lost trying to find an arguments parsing library when I realized the dotnet cli was open sourced.
After much struggle, failing to bingle. I started ripping through the Entity Framework, and dotnet cli's code hoping to find a gem. Thats when I stumbled across a diamond. You see many dotnet projects use Microsft.Extension.CommandLineUtils to do cli parsing.
Securing AWS Elasticsearch Service with .NET NEST API (and why I love open source)
Around 6 months ago I started a project, and part of that project was to move us away from an old search tool to use elasticsearch.
Wiring up client side logs into c#/node.js logging frameworks
Around a year ago I joined a new team where I work, and this team was starting to undertake a full rewrite of their code. We were going from a full c#/mvc app to a tiny c# api, and a very big SPA.
I started Bingling around and I stumbled across jsnlog. JSN log lets you quickly wire up your client side logs to your server. I have been able to get PR's into the code base and the guy behind it has been very friendly to me when I have had questions.
How .ToLookup() Saved me 4 hours a week, and got me some high praise from my boss
I recently created a small utility that is ran in jenkins to create indicies in ElasticSearch.
The first versions took around 5 hours to index our massive data into elasticsearch. This was still better than the 9 hours, our old solution took, so no one was complaining.
One of the major slowdowns was a
.Where() on a
List<T>. When I wrote the tool this TODO was written
//TODO: use some kind of key lookup here, but we need non-unique keys and Dictionaries are unique only
Xamarin For Android The Good: (Part 1 of 4)
- Part One
- Part Two
- Part Three
- Part Four
This will be a series of blog entries where I discuss the Xamarin platform for Android.
When I heard about Xamarin I naturally, wanted to give it a shot. Having tried Eclipse, and Android Studio for android development I was no idiot when it came to the platform. So I got a license, and did nothing with it for six months, until a few weeks ago. After only 3 days I created Ultimate Gravatar Sync. An app that sync's your contacts gravatar images to their picture in your phone.
C# with no compromise
The Xamarin platform uses mono, and some kind of voodoo bindings to the Java libraries to make it work. I wont go in depth, but the native features of the C# language are there to use. I never felt like my hands had been tied, that all of a sudden I couldn't use a library that is normally part of the GAC (Global Assembly Cache). When I needed multi-threading, System.Threading was there, and when I needed to use C# Generics I had no issues implementing them.
Manage Android Manifest files
One of the things that blew me away about the platform, was that I never had to add anything to my manifest file. For those of you whom don't know, Android requires an XML config detailing the permissions you require, and the classes you have in your application.
Simple decoration such as:
[Activity(Label = "Label", MainLauncher = true, Icon = "@drawable/Icon")]
Will Generate in your manifest file as:
<pre> <activity android:label="Label" android:name=".logoActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </pre>
Adding permissions is also easy:
Using Java Libraries
Xamarin provides some kind of crazy visual studio project, that will essentially provide c# bindings to Java libraries you require. To bind Simply create a Java Binding project, adding the .Jar files, and then build. Watch the magic happen. They do note that you sometimes need to do some configuration for certain libraries, however I had no issues with the one I tried. On top of that if you really needed to, you could access the Java Native Interface for even more power.