Hi. I’m Jeremy Brayton.

Here are some thoughts of mine.

JazzHands: Tackling the FizzBuzz problem

Due to a comment on Hacker News (original post here), I thought I would put my money where my mouth was, so to speak, and tackle this problem in a public repository.

My comment could likely be seen as dismissive or arrogant. I get that. My biggest problem is that because people still fail, this is the interview equivalent of patty cake: awkward, childish, and unrewarding (unless you’re a 2 year old).
To be quite honest, I don’t quite understand my disdain for the problem. It’s simple enough that it can be solved a number of ways quickly and gets you to express at least the fundamentals of development in a particular language.

This exercise is an excellent opportunity for a number of things:

  1. It’ll be a form of code kata and I need practice, even on something I dislike greatly.
  2. Much of my work isn’t public, as I often rarely see the benefit of my specific ideas being shared. I don’t need to prove anything by doing this but I don’t see this hurting anything.
  3. If you believe my time tracking is accurate, it should demonstrate at least some proficiency in languages I know and how quickly I can at least have a basic understanding of the ones I don’t.
    1. My proficiency in order is C#, PowerShell, Javascript, PHP, Pascal, then Ruby. The latter 3 don’t rattle around in my brain as much as the former.
    2. F#, Objective-C, CoffeeScript, C/C++, Go, Dart, and Haskell are the planned languages I’ve mostly touched in passing or know about.
  4. This would be a good opportunity to write tests to check the work. A neutral 3rd party would be ideal as the tests could influence the experiment.
  5. It’ll also give insight into my habits regarding structure and clean, concise code. I prefer readable code with very little comments because I feel the code itself should be the comment. This largely isn’t possible in most code bases but it shouldn’t really be a problem here.
  6. To prove to myself that I don’t just take examples from Google and make them my own, that I can start from scratch when I need to.

Note: I’m using http://rosettacode.org/wiki/FizzBuzz as a language guide only. If you see me follow a specific example, punch me in the nuts.

The best description of the problem can be found here, specifically (altered for this example):

Write a program that prints the numbers from 1 to 100. But for multiples of three print “Jazz” instead of the number and for the multiples of five print “Hands”. For numbers which are multiples of both three and five print “JazzHands”.

This brings up some excellent points. I’m definitely not above FizzBuzz or live coding but I still can’t pinpoint why I have beef with this particular problem.

I honestly can’t remember the last time I’ve actually tackled this problem so the potential to look really foolish, at least at the beginning, is pretty high.


Notable Octopress tweaks: Copyright, Tags, & Feed Excerpts

Copyright

This is almost pointless to mention but the standard templates give you a very specific copyright with respect to atom feeds (Copyright (c) x-y). The file source_includes\custom\footer.html includes a way of gathering the system time in the form:

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Copyright © {{ site.time | date: "%Y" }}

I simply replaced the current hard-coded year with the ruby code above so that when the site is generated, it always gives the current year.

In case any of you are wondering how to insert codeblocks with liquid syntax, see this post.

Tags

This is more involved but luckily gist makes it stupid simple to include here. Everything is pretty much a rip off of the category_generator plugin and includes with just minor tweaks to use the tag object.

_config.yml:

plugins/tag_generator.rb (an almost complete copy of category_generator.rb)

source/_includes/archive_post_tags.html

source/_includes/custom/tag_feed.xml

source/_includes/post/tags.html

source/_layouts/tag_index.html

Feed excerpts

The following goes on line 23 in my atom.xml file, or right before the content tag. A better alternative would be to detect an excerpt and only display that or the content, not both.

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{% if post.has_excerpt %}<summary type="html">{{ post.excerpt | xml_escape }}</summary>{% endif %}

derpirc: WP7 IRC client take #2

Back in February of 2011, I posted a very rough alpha release of my first WP7 IRC app called dIRCa. I abandoned the project primarily due to the heavy reliance on Homebrew sockets and rewrote it from scratch using the wonderful IrcDotNet library. Not having to handle the core IRC quirks is a godsend and luckily it works rather flawlessly with 7.5+ (Mango and above).

I originally wrote a post back in 2011 to gather emails for the beta submission process but it never got published. I was also working diligently to release a competent v1.0 but my perfectionism got the best of me.

I’ve since release it as open source on Github. The project is abandoned so far as my HD7 phone is no longer consistently in use now that I’ve switched to the HTC 8x and Windows Phone 8.

The barriers to make it a Windows Phone 8/WinRT version are pretty high:

  1. SQL CE was a terrible choice as a message store. They ditched it in favor of SQLite which had extremely sketchy WP7 support (this means a complete break from WP7)
  2. IrcDotNet is very much a traditional .NET library where the developer focuses on Mono. You could say this project is abandoned as well, so no official WinRT port is expected.

The original project received quite a bit of downloads for my first open source project (around 700 by this time) with the reason primarily being that a XAP was already built. On Github there are no releases but I look to remedy that very shortly.

The application is pretty functional but it is rather rough around the edges. For instance, when you first start it you’re required to go to the settings screen as exiting initializes and starts the connections to the various networks. I intended this to be covered in a tutorial of sorts but that was something I was going to cover off last.


Octopress site generation on Windows 8.1

Install RailsInstaller from here. I use the version with Rails 3.2.

libcurl

  • Download the latest “Win32 - Generic” libcurl with SSL development release from here (this is the last entry as of 10/23/2013).
  • Unpack the zip file.
  • Copy curl.exe, libcurl.dll and libidn-11.dll to C:\RailsInstaller\bin.
    The reason I copy curl to test the program. It verifies the files are in the expected path and has an added bonus of making sure all the dll dependencies are present. This is how I figured out libidn-11.dll was necessary to include.

SSL certificate setup

  • Download cacert.pem.
  • Place file in C:\RailsInstaller\cacert.pem.
  • Set an Environment Variable in Control Panel with the Variable name: SSL_CERT_FILE and Variable value: C:\RailsInstaller\cacert.pem.
  • To temporarily set the variable for this command prompt session, use set SSL_CERT_FILE=C:\RailsInstaller\cacert.pem.

My blog’s notable Octopress tweaks

My plan is for this post to serve as an index to the upcoming posts. Unlike the ASP.NET MVC posts that fizzled (sorry), I need to chronicle these changes in the event I need to dissect them again.

Here’s the collection in no particular order:

  • Copyright date - This one is simple and almost not worth noting. I use a copyright date range of “[start year]-[current year]” and this post simply explains the what and why.
  • Tag generator - Octopress will not support tags. Tag index pages are trivial to implement but I’m also starting to agree with the premise that one taxonomy should really be enough.
  • Feed excerpts - These aren’t generally created to my knowledge, or specifically the summary section. The general way to create excerpts is a little awkward but smart.
  • Google Form notification full service sample taken from here.
  • (Upcoming) Category & Tag index generators for the primary /categories/ /tags/ directory. WordPress didn’t have this either but it would be a good idea to list all of them in one place.

One thing in the FAQ that particularly bit me during the WordPress conversion was Using Non-ASCII Characters In Your Blog. Most conversion posts cover this but I’m in the habit of always having this as part of my environment just in case.

The primary reason for my approach so far was to be a close representation as possible of the WordPress site to combat 301 redirect woes. Tags will eventually disappear I think but I like the exercise of making sure they’re around in full. The platform seems to support “something” so it’s fun to see how far I can go with it.


Migration from WordPress to Octopress Complete

In case anyone was watching, I switched the blog from a generic WordPress with a slightly customized theme to octopress. I’m using the excellent Octoflat theme with a few notable tweaks. I reintroduced the search and feed buttons as well as expanded the navigation to allow nested menus. The theme allows for nested menu elements and while 2 levels deep is highly acceptable, I happen to use 3.

I’m writing this post using the excellent MarkPad which serves all of my needs perfectly. You don’t need a markdown editor, but having one with live-preview that reinforces the markdown syntax is killer. That I can insert a URL and it automatically format the document accordingly is a small but useful touch.

I plan on posting the various tweaks that make up this blog. While there aren’t a ton, I think a few of the concepts are worth expanding on. I don’t claim these tweaks are original by any means but I found a lot of ideas needed to be fleshed out a little more to be acceptable for my tastes. Yes, I’m anal.

I expect nothing but great things from this migration though it took roughly a month of quite a few tinker sessions to get things where I wanted it. I blame using Ruby on Windows to be a big culprit but also my n00bness got in the way in some areas. It also took me quite a bit to grok how deployments functioned but now that everything gels, I don’t expect any issues.

The site will continue to be a slight work in progress as I button up some of the loose ends. I have a few design tweaks in mind and I’m looking to expand my portfolio with more current projects. Not everything I’ve done in the past 2 years can be seen unfortunately but there’s quite a body of work piling up, waiting to be shown.


Shadow Copies on XP, robocopy, PowerShell v2

[I forgot to post this draft back in April 2010. Needless to say I no longer utilize the technique nor can really help now that it’s purged from my memory]

I’ve cobbled together a poor-man’s backup solution using PowerShell and robocopy in what I thought was a somewhat resilient solution. Robocopy turned out to be a poor choice based upon my needs and nitpicks but I wanted to outline why to save myself and others a little pain.

Strike 1:

This URL describes the bug and relative fix: http://superuser.com/questions/48303/access-denied-error-with-robocopy-as-admin. While using /ZB and /B helps it wasn’t solving the problem because the relevant ACLs weren’t being created even as late as Windows 7.

Strike 2:

robocopy has 3 (relevant) major versions: 2003 Resource Kit (the one I was using 010), Vista/RoboCopy GUI (026), and Windows 7. To make things more complicated, installing RoboCopy GUI on a 2003/XP machine will put robocopy under %windir%system32 which happens to enumerate after the 2003 Resource Kit path. This means you have to explicitly call system32robocopy or rename the resource kit version if you hope to keep the other resource kit tools.

Strike 3:

I erroneously thought by adding users to the Backup Operators group, a requirement to use the /B switch, robocopy was creating local shadow copies. I might have been confusing it with HoboCopy and figured taking a shadow copy snapshot before a robocopy operation would fix the problem. Turns out taking all that time, determining you almost always need to be administrative, and XP’s limited ability to easily expose a snapshot as a drive letter/share made this become an incredible deal breaker.

Temporary solution:

To combat the bug that started this investigation, I initially tried using version 026 of robocopy to no avail. I used every combination of /copyall, /copy:dats, /copy:dt or just /copy:d.

What really fixes the problem is to completely obliterate the destination folder(s) and start over. This would correctly build the relative ACL and prevent the access denied message but it would only be a matter of time until it happened again.

My permanent solution:

  1. Steal Steve Murawski’s great Invoke-SyncFrameworkSample code outlined here. (download link at the bottom)
  2. Install Sync Framework 2.0 Runtime.
  3. Modify code to use 1 or 2-way sync (default sample is 2-way).
  4. Modify code to enumerate the FileReport object and build a slightly more robocopy-like output.
  5. Modify code to create DestinationPath*. If it isn’t found it doesn’t make sense to do a 2-way sync either.
  6. ???
  7. Do not profit. The bulk of the code isn’t mine :(

Note: Robocopy is an end-to-end solution whereas I have far more flexibility to shoot myself in the face with this PowerShell script and the Sync Framework in general.
*: This technique negates the solution completely because I’m creating these directories under the user context the script is run in.

Shadow copies aren’t used so to run this in a limited user context I still need the user in the Backup Operators group. I will likely work up a solution using shadow copies on the server as I can rather painlessly manipulate them using WMI. AlphaVSS behaves much better if you are not using Windows XP too.


Dotfuscator on WP7 hurdle: re-signing assemblies

I’ve started toying with the proper Dotfuscator project settings to give me a workable, yet relatively-secure-as-possible package for deploying to private beta testers and the Marketplace. A great starting point for this journey could be found here: http://weblogs.asp.net/bsimser/archive/2010/12/31/dotfuscator-deep-dive-with-wp7.aspx.

Before we start, my project includes a number of 3rd party controls like AppBarUtils, MVVMLight, Funq, and my favorite IrcDotNet (which is the source of this post). The instructions say to use your XAP file as input so we’ll follow that. On the far right-hand side of the Input Files toolbar is Transform XAML/BAML resources in all assemblies. Click this to turn it off primarily to be thorough. I believe this affects MVVM because it tries to rename Xaml internals that are data bound. Follow the instructions on the Settings->Global Options screen to set Disable Control Flow and Disable Renaming to No to enable them.

Now click the Build Project toolbar button to build your project. If your XAP includes a signed assembly, you’ll be greeted with the following message:

Warning: The strong named input assemblies (or assembly) <TempDirectory>IrcDotNet.dll were not resigned. You will need to sign these dotfuscated assemblies manually.

My first instinct was to go to the Settings->Signing screen, and enable Re-sign Strong Named Assemblies and point it to IrcDotNet.snk. If you do that you’re met with a different message:

Signing Assemblies… Running sn.exe /q /R <ConfigDirectory>IrcDotNet.dll <Location of>IrcDotNet.snk Warning: Password protected Strong Name files are not supported sn returned 1. Build Error.

This is the end of the line as far as automation goes. The only recourse is to sign the assembly manually as the original warning states. If you do not resign this file before deployment, your app will not startup properly. Once code hits that signed assembly it simply will not function.

My first approach was to go to the Rename and Control Flow tabs and exclude every assembly other than my own. This produces the same result. Assemblies are reassembled regardless of whether or not any options are applied.

My preferred approach is to go to the Input tab, right click on each 3rd party assembly and click Exclude assembly from package. This has a lovely UI effect of removing everything from the screen and pausing while Dotfuscator works its magic. The added bonus? This happens every assembly. The bare minimum would be to only remove those signed assemblies but I took it all the way and removed all 3rd party dlls. These are all open source frameworks so obfuscating them isn’t necessary.

Now click Build Project again and the app starts! Inspecting the result in IL Spy gives me a runtime error on decompile, meaning control flow is on and teh IP iz protectordez. My app also uses localization and Smart Obfuscation automatically disables renaming for my localization resources so no extra legwork is needed to exclude them.

In summary if you don’t need to obfuscate 3rd party assemblies, simply exclude them from the Input tab rather than trying to exclude them in the individual obfuscation tabs. Ilasm is still ran on the assemblies which triggers the need to re-sign them.


Avenged Sevenfold - Nightmare -> Severe badassery

I promised a post on kind of breaking down how I understand the album but I thought a combination of it could make me pretentiously douchie and who really cares? Well I do.

I figured I’d try to post this as I listen to the album, giving notes on each track. One thing kind of goes without saying that this is The Rev’s last studio work before his death and much of that echoes through each track to me. It’s going to be very weird hearing an A7V track without him physically on the drums. Not that I hated any of the other albums mind you, but this is perhaps his best work too which makes it even more tragic to me. I literally can’t listen to it without going “Aww damnit!” every time I remember.

I won’t try to dissect what I think each track means I don’t think. That seems a little pretentious because people often have their own interpretation anyway. Now that I’ve bored you and the title track Nightmare is over I can go over it:

1 Nightmare - The opening track starts out really mellow which A7V can do quite well but when hell hits around the 0:30 second mark it instantly becomes a typical track. Dueling squeals of guitars and drums of steel quickly start the crescendo to the first verse. The solo sections aren’t too over done and when the drums come back, I can’t help but start head banging. This is a strong opening for me, really.

2 Welcome to the Family - I have to admit now that I’ve stopped playing the entire album full stop, I tend to skip this one. This is a track I’d love to play on Rock Band just for the random complexity in spots. As I listen to it I can’t really put why I don’t like it to words but I think I just pine for the other tracks.

3 Danger Line - I confess I did skip the last track. Danger Line starts with a sweet snare bit that just keeps me interested immediately. I said I wouldn’t describe the meaning of tracks but this one seems pretty straightforward and I’ll admit it’s part of what hooks me. It doesn’t hurt that during the verse there’s a badass low riff leading to more dueling fills. What really gets me, and sets off that response someone had a name for is right around 3:15 when the piano starts (Hi, Rev! :(). Once the last words are spoken and the guitars come back, I not only identify with the person the track describes but The Rev as well. It’s partly eerie how well it works and how deep it can go without personally knowing these people.

4 Buried Alive - Starting off with a lovely ditty to immediately follow the last track, I get sucked in like a black hole. I might not some of these tracks on their own but the order was pure mastery except for one caveat*. There’s not much I can say other than it’s just all good and especially around the 5:00 mark when the beat changes. Much head banging ensues.

5 Natural Born Killer - Starts off strong with a nice fast tempo. I tend to not like this track like #2 for unknown reasons. I suppose the correct phrasing would be “like less” because I could listen to all of the tracks quite easily but others have a lot of gravity if the metaphor holds.

6 So Far Away - I suppose the only thing I can really say is the words are eerie in the context of everything but right about 3:40 when the slowness starts it ramps up in awesome for me. Belting out “Soooo far awaaaaay” really makes the words hit even harder.

7 God Hates Us - As a Christian I can’t say I enjoy the lyrics at all, which tends to lead me to skip it. Yeah I know, such a Bible thumping behavior but I suppose part if it reminds me of the times I did “hate God” which only reminds me of how drastically my view to cause such hatred was altered. I don’t believe God hates anything but that’s neither here nor there.

8 Victim - It’s hard to describe any special parts of the track though I listen to it consistently with everything else. It’s a solid yet basic A7V track to me.

9 Tonight The World Dies - I actually have to skip this track consistently. When he sings a long “Iiiiiiiiiiii” somehow that note just pierces my brain and I want it out of my head immediately. I’m listening to it to the point where that starts, which is right around 1:40. Ugh skip time.

10 Fiction - By far far far far my favorite track. I suppose it’s The Rev’s badass piano work in addition to the drum beat. The entire thing is just ear sex to me. I’m being sonically “fucked gently” as it were. Ending on the organ as they do just seals the entire package for me. I can’t really explain it other than “mmmmmmm mmmmmmmm, bitch!”

11 Save Me - Welcome to my second favorite track and only because of the fucking awesome intro. This is the way to end a metal album to me and again goes back to placement. I’d really love to play this on Rock Band. Being a 10 minute song though would be Freebird quality almost but I suppose I can’t get over how awesome the song is in spite of this. To that end it almost gets too excessive but it never steps over that boundary. “Tonight we all die young” does explain things quite well and since that’s my last lyric paste I can promise I won’t make any more.

*- The caveat is the last two tracks are so badass I’d rather listen to them earlier but it does end with a huge bang.

So there you have it. I personally think it’s a badass album and I’d almost listen to tracks 10 and 11 first but any new album always gets a straight 1-n pass as many times as I can stand it so I can determine which tracks I skip. This album has almost 0 especially if I just wanted to be lazy. This is Avenged Sevenfold to me and every album has grown to be better than the last for me. It’s quite sad that I’ll miss The Rev though, especially having never seeing them live yet.


WP7 IRC Client -> dIRca

I chose a cheesy name to spoof on one of my favorite films lately, Team America: World Police. The project likely wouldn’t exist if it wasn’t for the pioneering efforts of Jeremiah Morrill on the XDA forums. I used the Homebrew project, built by daveux here. The primary reason I chose it was a more 1:1 with the System.Net namespace to use one project for both Windows and Windows Phone (or Silverlight or whatever until the Portable Library Projects bake into VS 2010 SP1).

I’m in the process of determining if I want to use CodePlex or BitBucket and I’m really torn. Bitbucket has awesome small features like merging usernames and a slightly better issue tracker (2 extra fields whee) with external services support as well like being able to track things via Google Analytics. I may just release to both initially just to see which gets picked up or used more often but that may bite me in the ass.

As of today the app works connecting to the very first server created in the settings factory. The very first thing I want to get done after this is use real settings stored in isolated storage and build the UI to change it. I’d like to do that before taking off the reigns and publishing for real but I’ll see how that goes.

I could try to explain the UI but screenshots would serve a better purpose of landscape and portait mode respectively:

I’m using the excellent Chillen font, one I’ve dubbed the new Comic Sans so we’ll see how long that sticks. At least initially I hope to have multiple servers as pages with their own pivot controls for channel and query messages. DCC and CTCP commands aren’t supported at all and I don’t really parse channel events yet except topic changes but things are slowly coming together now that the networking infrastructure is somewhat stable.

I am looking for testers but there’s some pretty big caveats. You need developer sideloading access to your phone, either through ChevronWP7 or normal marketplace unlock. I do not have any clue what will happen to this codebase after NoDo hits but I believe native support should still be possible. That puts me in a rush to try to finish something to at least incubate as people use it and luckily I could work on a WPF/SL port reusing almost all of the code.

I primarily posted this just to have a place to link to those screenshots for posterity since I couldn’t seem to figure out how to store local images in codeplex or bitbucket. My n00bness is showing…