Astronautradio.com

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Alex Kehayias

www.astronautradio.com/

Hacker. Product Designer. Musician.

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Where is www.astronautradio.com hosted?

Country:
United States
City:
New York
Registrar:
GoDaddy.com, LLC
Latitude:
40.74
Longitude:
-73.98
IP address:
66.6.44.4
IP Binary address:
1000010000001100010110000000100
IP Octal address:
10201426004
IP Hexadecimal address:
42062c04

Context analysis of astronautradio.com

Number of letters on this page:
20 384
Number of words on this page:
4 626
Number of sentences on this page:
240
Average words per sentences on this page:
19
Number of syllables on this page:
6 765
Number of Strong texts:
10
Number of Bold texts:
7

Domain name architecture

Domain name length:
18
Hyphens:
Domain doesn't contain hyphens!
Domain name with Hindi letters:
अ स ट र ओ ञ अ उ ट र अ द इ ओ . च ओ म
Domain name with Hebrew letters:
(a) שׂ ת ר (ο) נ (a) (u) ת ר (a) ד (i) (ο) . ק(c) (ο) מ
Domain name with Cyrillic letters:
a с т р о н a у т р a д и о . ц о м
Domain name with Arabic letters:
ا ص ت ر (o) ن ا (u) ت ر ا د (i) (o) . (c) (o) م
Domain name with Greek letters:
α σ τ ρ ο ν α υ τ ρ α δ ι ο . χ ο μ
Domain name with Chinese letters:
诶 艾丝 提 艾儿 哦 艾娜 诶 伊吾 提 艾儿 诶 迪 艾 哦 . 西 哦 艾马
Domain without Consonants:
strntrd.cm
Domain without Vowels:
aoauaio.o
Alphabet positions:
a1 s19 t20 r18 o15 n14 a1 u21 t20 r18 a1 d4 i9 o15 . c3 o15 m13
Domain name pattern:
V: Vowel, C: Consonant, N: Number
V C C C V C V V C C V C V V . C V C

<HEAD> DATA INFORMATION

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utf-8
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apple-mobile-web-app-capable:
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description:
Hacker. Product Designer. Musician.
keywords:
clojure,clojurescript,game engine,Emacs,mechanical keyboard
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twitter:app:id:googleplay:
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External links in astronautradio.com

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  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw2ERek8K&p[title]=Open a terminal with projectile in emacs&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=I find myself constantly switching between projects and running scripts from the project root. Here’s a little emacs function and key binding to quickly switch to a reusable ansi-term for the project. Enjoy! ;; Enable Projectile globally (projectile-global-mode) (defun projectile-term ()
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  • https://twitter.com/intent/tweet?url=https%3A%2F%2Ftmblr.co%2FZwrzYw2BULn5n&text=Setting up a Nix environment for Rails%20-%20
  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw2BULn5n&p[title]=Setting up a Nix environment for Rails&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=Reproducible builds is one of those things that drive developers insane when attempting to debug or set up local/staging/production environments. The number of hours I’ve spent tracking down inane differences in packages between servers or wondering why something that worked perfectly on my laptop causes apocalyptic bit fires in staging/prod is too damn high and there must be a better way. I’ve gone through many tools attempting to solve problems related to reproducibility including Chef, Puppet, Ansible, and Vagrant. Most of these tools aim to solve automated deployment and address reproducibility orthogonally. If all servers are in the same state and the state of the world has not changed, you can rely on a deterministic outcome. Both Docker and Nix directly address reproducibility, but in different ways. Docker creates jails for processes to run in and images to use to replicate across many machines. Nix solves the problem in a different way, by building declaratively from immutable packages so that builds are “stateless”. Nix can be used along with Docker to distribute images or by sharing the Nix expression that builds the environment. In my time spent in the world of functional programming with Clojure, the approach of immutability and functional purity to solve state problems (environments are state) strongly appeals to me. Trying out Nix You don’t need to use a separate operating system (NixOS) to take advantage of what Nix has to offer. Instead we will use nix-env and nix-shell to create a local development environment that is completely isolated and, hopefully, reproducible anywhere that Nix runs. Here is a simple Nix expression for configuring an isolated Ruby environment. with (import {}); stdenv.mkDerivation { name =
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  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw21tlIL3&p[title]=Super simple API mocking for frontend development&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=Single page web application tend to need a lot of mocked out data from an API to make local development possible. This leads us to manually mocking out each endpoint separately, creating dummy data for the response, and wiring up the local development server. It often takes a lot of work to create realistic looking data and even more work to maintain it as we iterate. Here’s something I’ve used before to mock out APIs for the frontend when another team is hacking away at the API server. I’ve found this strategy makes it easy to change, fix bugs, and work with real data locally. You simply save API responses to file in a well structured directory tree and that’s it. No rewriting routes, no manual changes to fields, no mess! Mock API Server Here’s a simple Clojure function and Compojure route that will look through our project resource directory and return a 200 json response: (defn mock-api-response [prefix-path uri] (let [resource-path (format
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  • https://twitter.com/intent/tweet?url=https%3A%2F%2Ftmblr.co%2FZwrzYw1dZwiUt&text=Building the Ergodox Keyboard%20-%20
  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw1dZwiUt&p[title]=Building the Ergodox Keyboard&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=I recently built the Ergodox keyboard from the last Massdrop in November 2014 and figured I would share the things I wished I had known before building it and some initial impressions. The Build As a first time solder-er this may have not been the best project to learn on, but I made it through with a fully functioning keyboard and that nice gratification of a job done well enough to be ok kind of feeling. There are two instructions that I followed. The fist is the instructions from Massdrop and the other was a helpful, high definition video of someone putting it together. Although there was no narration in the video, I found it to be much more clear when it came to details of how to actually complete the steps outlined in the Massdrop instructions. Practice soldering before you build It’s a good idea to get some practice in soldering if this is your first time. My dad had an old board laying around and I practiced soldering resistors into tight spaces. This proved to be useful when it came time to doing it for real I was not worried about messing up and could focus on doing it well. Which way is up? What they gloss over the instructions is that both PCB boards are identical. I thought I put all the resistors and Teensy board on the wrong side because of the labels “Right Hand Side” and “Left Hand Side” exist on both halves. Follow the pictures exactly, using them as reference for each step. Don’t try to use the aforementioned labels because it will get confusing and lead to mistakes. Surface mount diodes are tiny They are required on each key and must be facing the correct direction or the key will not work. You need to use a very small amount of solder or you will end up shorting the key by filling in the hole next to where the diode is supposed to go. If you look at the helpful video mentioned above you will see that they are using some sort of conductive glue instead of hand soldering each point. I did not have such fine tools so I had to solder them by hand. The technique I used was to first put a small amount of solder on one contact point only. Then grab the diode with tweezers and place it on top of the solder and use the iron to melt it into the spot. Release the iron first, leaving the tweezers, and then release the tweezers. It will be held in place for you to solder the other side. This technique was very effective and I only had two keys I had to redo. In retrospect though, I wish I had some conductive glue as this was super time intensive and panic inducing.  The USB Cable Dance  Nowhere in the instructions do they tell you how to gut a usb cable. I don’t find it to be common knowledge so I had to be a little creative in doing it. In the video, the guy uses some sort of drill to cut through the rubber of the cable and de-shell it. I did not have such nice tools, nor did I trust a drill bit right next to my fingers so I opted on a different technique. First, I took a box cutter, hands far, pressed the blade into the fat part of the connector down the middle. I did that on both sides and used my fingers to peel it away from the metal. The rubber went further in so I had to cut a bit around it, but I was able to remove it. Then I used the razor to shave away the rubber around the wire in the same way you would peel a carrot. Eventually you get to the mesh and can peel it away with your fingers to reveal the wires inside. Once you have the internal wires you then need to strip them. They are extremely thin so it is very easy to accidentally go right through it. I ended up using a wire cutter to strip it, but it took several tries. Once the wires are exposed then you have to somehow get it through the correct holes, hold it there, and solder it. Best advice I can give there is to leave yourself enough wire length to mess up and try multiple times. Correcting mistakes Soldering mistakes can be fixed with a pump or a special thread. I had neither of these things. You can usually reflow the solder to the point where you correct the mistakes. An obvious problem is any places where the solder touches another joint, connecting two places that you did not intend. What I ended up doing was taking the iron and drawing a line across the problem area to separate both places to prevent a short and reflow to make the solder attach to the iron and wiping it off to remove and excesses. Your results may vary… When it comes time to plugging the keyboard in to make sure it works, try out each key individually and mark which ones are not working. More than likely it is a connection that you should reflow or a diode on a key that is not connecting. I had two keys where the diodes were not touching somehow and was fixed by reflowing to make a better connection. Keyboard impressions My initial impressions of the keyboard have been positive and I am especially enjoying the firmware customization via tmk_keyboard. So far my favorite part is being able to toggle a mouse and use that instead of taking my hands off of the keys. You can easily customize the layout and position of the keyboard to fit your needs (albeit with some tinkering). The split design allows for a more comfortable arm/hand position and I’m slowly getting used to the matrix key layout. The thumb cluster inner keys don’t seem to be in a convenient place so I’m not sure how useful they will be. As an emacs user, I’m hoping to gain some productivity from placing ctrl and meta in the thumbs. Also mechanical keys are clearly a winner compared to the Apple chicklet keys after a few days of use.  Overall, I have never been this excited for a keyboard and it mainly appeals to my desire to customize and tinker. If you’re not into that and have no emotional attachment to building things then there is no way it will be enjoyable. I write software so I know the pleasure that can come from pain :-)
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  • https://twitter.com/intent/tweet?url=https%3A%2F%2Ftmblr.co%2FZwrzYw1S6CqsS&text=Simple centered text mode in Emacs%20-%20
  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw1S6CqsS&p[title]=Simple centered text mode in Emacs&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=Here’s a dead simple emacs mode for centering text in the middle of an emacs buffer (called windows). (defun center-text ()
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  • https://twitter.com/intent/tweet?url=https%3A%2F%2Ftmblr.co%2FZwrzYw19gHiow&text=Circle based collision detection in Clojure/ClojureScript%20-%20
  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw19gHiow&p[title]=Circle based collision detection in Clojure/ClojureScript&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=Imagine there are two entities on a two dimensional plain. Let’s call them the Player and Monster. Let’s assume both the player and monster have some “mass” in that they are not a single pixel on the screen. The widest part of their mass is what we need to check if they are in contact with one another (if we bump together it’s not like innards touch). How can we tell if some oddly shaped entities are touching in my game? We need to reduce the problem by reducing the complexity of the entities’ shape. Let’s imagine a circle is drawn around these two entities that we will use to represent their mass. To determine if the monster and player are colliding we simply need to determine if two circles are touching on every run through the game loop. This is extremely practical and fast. (defn exp
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  • https://twitter.com/intent/tweet?url=https%3A%2F%2Ftmblr.co%2FZwrzYw19JZz-s&text=Entity Component Model in ClojureScript%20-%20
  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw19JZz-s&p[title]=Entity Component Model in ClojureScript&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=I’m working on game engine using ClojureScript and Pixijs for rendering. Object oriented anything doesn’t mesh well with Clojure (and ClojureScript) so modeling our game world using objects and inheritance is out. The entity component model, while object oriented, is actually a great fit for a ClojureScript game. Using records and protocols we can create an expressive game engine with all the benefits of immutable data and coordinated state changes. It’s super easy to mix and match components to create new elements of a game. A Simple Entity Component System There are 3 parts we need to create, entities (defrecords), components (defprotocols), and systems (a vector of functions). Here is an example of a few simple components and their implementation. (defprotocol Moveable (move [this state]
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  • https://twitter.com/intent/tweet?url=https%3A%2F%2Ftmblr.co%2FZwrzYw17u4KhE&text=Batching Writes in a Storm Topology%20-%20
  • http://www.facebook.com/sharer/sharer.php?s=100&p[url]=https%3A%2F%2Ftmblr.co%2FZwrzYw17u4KhE&p[title]=Batching Writes in a Storm Topology&p[images][0]=http://assets.tumblr.com/images/og/text_200.png&p[summary]=A common use case for Storm is to process some data by transforming streams of tuples. At Shareablee, we use Storm for collecting data from various APIs and one of our needs is to write denormalized data to Amazon S3 so that it can be processed later using Hadoop. If we stored each tuple we would end up with a huge amount of tiny files (which would take forever in Hadoop). How do you accumulate data (state!) so you can batch the writes to S3 in a stream processing framework like Storm? Coming to terms with state In general, keeping your topologies free from state will save you lots of grief. The key to stateful bolts is to remember the following properties of Storm bolts: Prepared bolts allow you to maintain state for a bolt Prepared bolts process one tuple at a time They can be tried more than once We can safely accumulate state inside a bolt without worrying that some other process will change it right out from under us. State is local to the process and since it will only process one tuple at a time, it is safe to change the state within the bolt.  Since bolts can be retried (see the guaranteed message processing in the Storm wiki), we need to model our problem in a way that is safe to do more than once. Since our problem is side effected (we want to write to files and S3), anything that relies on this data must know that there may be duplicates. This was not an issue for our use case (we remove duplicates map reduce side), but you may want to stick to writing to transactional databases if it is.  Tick tock clock spout A simple way to model our problem is to create a spout that emits every n seconds. We assume that in the time between ticks we will be accumulating data. The accumulator bolt will be listening to the clock stream and perform the writes (in batch) only when it receives a tick from the clock spout. Here’s a simple clock spout that can be configured in the Storm config: ;; Interval is set in the topology config clock.interval.seconds ;; In the event of a failure, waits until the interval before emitting (defspout clock-spout [
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