Concurrency, Goroutines and GOMAXPROCS
29 Jan 2014
Introduction When new people join the Go-Miami (http://www.meetup.com/Go-Miami/) group they always write that they want to learn more about Go’s concurrency model. Concurrency seems to be the big
Decode JSON Documents In Go
21 Jan 2014
Introduction We are working on a project where we have to make calls into a web service. Many of the web calls return very large documents that contain many sub-documents. The worst part is, we
Be Selected To Attend GopherCon 2014
16 Jan 2014
Gopher Academy announced (http://blog.gopheracademy.com/scholarship-for-women) a great program today. Today I’d like to announce the GopherCon Scholarship Program. It’s goal is to increase the
Go Package Management For 2014
16 Jan 2014
Introduction In October 2013 I sent out a call to action to the Go community. I wanted to form a group of Gophers that would come together and help write a specification and build a working
Macro View of Map Internals In Go
31 Dec 2013
Introduction There are lots of posts that talk about the internals of slices, but when it comes to maps, we are left in the dark. I was wondering why and then I found the code for maps and it all
Queue Your Way To Scalability
20 Dec 2013
Introduction The first thing I did when I started programming in Go was begin porting my Windows utilities classes and service frameworks over to Linux. This is what I did when I moved from C++ to
Three-Index Slices in Go 1.2
17 Dec 2013
With the release of Go 1.2, slices gained the ability to specify the capacity when performing a slicing operation. This doesn’t mean we can use this index to extend the capacity of the underlying
Sample Web Application Using Beego and Mgo
11 Dec 2013
Introduction I am very excited about the Beego web framework. I wanted to share with you how I use the framework to build real world web sites and web services. Here is a picture of the sample
Building A Weather App Using Go
10 Dec 2013
At Ardan Studios (http://www.ardanstudios.com/) we have spent the last 6 months, in our spare time and on weekends, building a consumer based mobile application called OutCast
Write Your Go Programs Using GEdit
23 Nov 2013
This is a guest post from Tad Vizbaras from Etasoft (http://www.etasoft.com/) in South Florida. There are a number of editors and IDEs for Go development. LiteIde, Vim, Emacs and GEdit just to
Label Breaks In Go
21 Nov 2013
Have you ever found yourself in this situation. You have a case statement inside of a for loop and you would like to break from both the case and for statements in a single call? var err error
Using The Log Package In Go
5 Nov 2013
Linux is unique to Windows in many ways, and writing programs in Linux is no exception. The use of standard out, standard err and null devices is not only a good idea but it’s the law. If your
Using XSLT With Go
3 Nov 2013
I am working on a project that requires pulling and processing different XML feeds from the web and storing the data into MongoDB as JSON. Since new feeds come up everyday, changing the Go program to
Manage Dependencies With GODEP
26 Oct 2013
Introduction If you are using 3rd party packages, (packages that you don't own or control), you will want a way to create a reproducible build every time you build your projects. If you use 3rd party
My Channel Select Bug
17 Oct 2013
I was testing new functionality on a program that is already running in production when suddenly the code behaved very badly. What I saw shocked me and then it became obvious why it happened. I also
Functions and Naked Returns In Go
10 Oct 2013
In Go values that are returned from functions are passed by value. Go gives you some nice flexibility when it comes to returning values from a function. Here is a simple example of returning two
Cross Compile Your Go Programs
2 Oct 2013
Introduction In my post about building and running programs in Iron.Io (https://www.ardanlabs.com/blog/2013/09/running-go-programs-in-ironworker.html), I needed to switched over to my Ubuntu VM to
Go Package Management Call To Action
1 Oct 2013
Nathan Youngman, with the help of others, has produced this document outlining months of research and discovery. I would appreciate everyone to honestly read it before continuing with my post.
Detecting Race Conditions With Go
26 Sep 2013
I always find it interesting when I realize that something I have been practicing or dealing with for a long time has a name. This time it happens to be race conditions. This is something you can’t
Recursion And Tail Calls In Go
26 Sep 2013
This article was written for and published by Gopher Academy (http://www.gopheracademy.com/) I was looking at a code sample that showed a recursive function in Go and the writer was very quick to
Iterating Over Slices In Go
23 Sep 2013
Slices are used everywhere in my code. If I am working with data from MongoDB, it is stored in a slice. If I need to keep track of a collection of problems after running an operation, it is stored in
Pool Go Routines To Process Task Oriented Work
14 Sep 2013
After working in Go for some time now, I learned how to use an unbuffered channel to build a pool of goroutines. I like this implementation better than what is implemented in this post. That being
Slices of Slices of Slices in Go
10 Sep 2013
I am working on building code to load polygons for the different Marine Forecast areas in the United States. These polygons need to be stored in MongoDB and there is a special way that needs to be
Running Go Programs In IronWorker
7 Sep 2013
Introduction Iron.io has a product called IronWorker which provides a task oriented Linux container that you can run your programs inside. If you are not sure what I mean, think of this as having a
Timer Routines And Graceful Shutdowns In Go
4 Sep 2013
In my Outcast data server I have several data retrieval jobs that run using different go routines. Each routine wakes up on a set interval. The most complex job is the downloading of radar images.
Using CGO with Pkg-Config And Custom Dynamic Library Locations
31 Aug 2013
Earlier in the month I wrote a post about using C Dynamic Libraries in Go Programs (https://www.ardanlabs.com/blog/2013/08/using-c-dynamic-libraries-in-go-programs.html). The article built a dynamic
Organizing Code to Support Go Get
28 Aug 2013
For those of you who are like me, trying to learn the Mac and Linux operating systems, Golang programming and deployment constructs all at the same time, I feel your pain. I have been building a Go
Collections Of Unknown Length in Go
26 Aug 2013
If you are coming to Go after using a programming language like C# or Java, the first thing you will discover is that there are no traditional collection types like List and Dictionary. That really
Using C Dynamic Libraries In Go Programs
20 Aug 2013
My son and I were having fun last weekend building a console based game in Go. I was recreating a game from my youth, back when I was programming on a Kaypro II. I loved this computer. I would write
Understanding Slices in Go Programming
15 Aug 2013
Since I started programming in Go the concept and use of slices has been confusing. This is something completely new to me. They look like an array, and feel like an array, but they are much more
Using Time, Timezones and Location in Go
8 Aug 2013
I ran into a problem today. I was building code to consume NOAA’s tide station XML document and quickly realized I was in trouble. Here is a small piece of that XML document:
Gustavo's IEEE-754 Brain Teaser
5 Aug 2013
Back in June, Gustavo Niemeyer posted the following question on his Labix.org (http://blog.labix.org/) blog: Assume uf is an unsigned integer with 64 bits that holds the IEEE-754 representation for
An RSS Feed Searching Framework Using Go
29 Jul 2013
This article was written for and published by Safari Books Online Back in May, I finally decided that it was time to move away from the Microsoft stack to Linux. The cost of developing, licensing,
An Open Source Debate
27 Jul 2013
This article was written for and published by Safari Books Online If you read my article titled Analyze Data With MongoDB and Go, then you will understand the context of this debate with the idea of
Understanding Pointers and Memory Allocation
27 Jul 2013
In the documentation provided by the Go language team you will find great information on pointers and memory allocation. Here is a link to that documentation: http://golang.org/doc/faq#Pointers
Analyze Data With MongoDB and Go
24 Jul 2013
This article was written for and published by Safari Books Online My company is building a mobile application called Outcast. The idea behind Outcast is to give people who love the outdoors the
OSCON 2013 - The Gophers Are Coming
20 Jul 2013
On June 22nd through the 26th, Portland Oregon is hosting OSCON (Open Source Convention). The event is run by O’Reilly. After looking at the speakers list it appears it is going to be a great
Understanding Type in Go
12 Jul 2013
When I was coding in C/C++ it was imperative to understand type. If you didn’t, you would get into a lot of trouble with both the compiler and running your code. Regardless of the language, type
Object Oriented Programming in Go
10 Jul 2013
Someone asked a question on the forum today on how to gain the benefits of inheritance without embedding. It is really important for everyone to think in terms of Go and not the languages they are
Singleton Design Pattern in Go
6 Jul 2013
Multi-threaded applications are very complicated, especially when your code is not organized and consistent with how resources are accessed, managed and maintained. If you want to minimize bugs you
How Packages Work in Go
5 Jul 2013
Since I started writing code in Go it has been a mystery to me how best to organize my code and use the package keyword. The package keyword is similar to using a namespace in C#, however the
Running Go Programs as a Background Process
24 Jun 2013
I have been writing Windows services in C/C++ and then in C# since 1999. Now that I am writing server based software in Go for the Linux OS I am completely lost. What is even more frustrating, is
Reading XML Documents in Go
17 Jun 2013
I was really surprised how easy it was to read an XML document using the encoding/xml package that comes with the standard library. The package works by defining structs that map the XML document. If
Send an email in Go with smtp.SendMail
13 Jun 2013
I wanted to send an email from my TraceLog package when a critical exception occurred. Fortunately Go’s standard library has a package called smpt which can be found inside the net package. When
Go's time.Duration Type Unravelled
11 Jun 2013
I have been struggling with using the Time package that comes in the Go standard library. My struggles have come from two pieces of functionality. First, trying to capture the number of milliseconds
Understanding Defer, Panic and Recover
8 Jun 2013
I am building my TraceLog package and it is really important that the package logs any internal exceptions and prevents panics from shutting down the application. The TraceLog package must never be
Documenting Go Code With Godoc
5 Jun 2013
As you know if you read my blog, I have been building a set of new utility packages so I can start developing an application server I need for a new project. I am brand new to Go and the Mac OS.
Installing Go, Gocode, GDB and LiteIDE
2 Jun 2013
Check out my new installtion document: https://www.ardanlabs.com/blog/2016/05/installing-go-and-your-workspace.html (https://www.ardanlabs.com/blog/2016/05/installing-go-and-your-workspace.html) I
Thread Pooling in Go Programming
31 May 2013
After working in Go for some time now, I learned how to use an unbuffered channel to build a pool of goroutines. I like this implementation better than what is implemented in this post. That being
Why Go Programming
31 May 2013
For the past 20 years I have been writing server based and application software on the Microsoft stack. First in C/C++ leveraging the Win32 API and then in C# when .Net first was released. Over the