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  • Ruby or Python?

    - by Bobby Tables
    Hi all, This question is extremely subjective and open-ended. It might even sound like something I should just research for myself and make my own decision. But I'd like to put it out there and get some thoughts from others. Long story short - I burned out with the rat race and am on a self-funded sabbatical this year. Much of it is to take a break from the corporate grind and travel around, but I also want to play around with new technologies and do some self-learning projects, to stay up to speed on programming, and well - I just love tinkering with programming, when there's no pressure! Here's the thing: I am a lifetime C/C++/Java programmer. I'm a bit of a squiggly bracket snob since I've been working with this family of languages for my entire programming career. So I'd like to learn a language which isn't so closely syntactically related to this group. What I'm basically looking for is a language which is relatively general purpose, fun to learn, has some new concepts that are different from C++/Java, and has a good community. A secondary consideration is that it has good web development frameworks. A tertiary consideration is that it's not totally academic (read: there are real world jobs out there using it). I've narrowed it down to Ruby or Python. My impression of Ruby is that it is extremely web oriented - that the only real application of it is as a server side scripting language for doing web stuff (mainly Ruby on Rails). For Python I'm not so sure. TL;DR and to put it as succinctly as possible: which of these would be better for a C++/Java guy to learn to get some new perspectives on programming? And which is more open and general purpose and applicable to a wider set of applications? I'm leaning towards Ruby at the moment, but I worry to an extent that it looks like it's used as nothing but a server side web language.

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  • Ruby workflow in Windows

    - by Rig
    I've done some searching and quite haven't come across the answer I am looking for. I do not think this is a duplicate of this question. I believe Windows could be a suitable development environment based on the mix of answers in that question. I have been developing in Ruby (mostly Rails but not entirely) for about a year now for personal projects on a Macbook Pro however that machine has faced an untimely death and has been replaced with a nice Windows 7 machine. Ruby development felt almost natural on the Mac after doing some research and setting up the typical stack. My environment then included the standard (Linux like) stuff built into OSX, Text Wrangler, Git, RVM, et al. Not too much of a deviation from what the 'devotees' tend to assume. Now I am setting up my new Windows box for continuing that development. What would my development environment look like? Should I just cave and run Linux in a VM? Ideally I would develop in Windows native. I am aware of the Windows Ruby installer. It seems decent but its not exactly as nice as RVM in the osx/linux world. Mercurial/Git are available so I would assume they play into the stack. Does one develop entirely in Windows? Does one run a webserver in a Linux VM and use it as a test bed while developing in Windows? Do it all in a VM? What does the standard Windows Ruby developer environment look like and what is the workflow? What would a typical step through be for adding a new feature to an ongoing project and what would the technology stack look like?

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  • Rails 3 can not find sqlite3-ruby

    - by uswaretech
    I am trying to learn rails3. I tried folowing the installation guide from guides.rails.info, I installed sudo gem install rake rack-test rack-mount erubis mail sudo gem install tzinfo builder i18n memcache-client sudo gem install text-format thor And rails 3 via sudo gem install rails --pre Now I create a new app rails abc And try rake db:create Which fails with Could not find gem 'sqlite3-ruby (>= 0, runtime)' in any of the sources. So I try installing sqlite3-ruby sudo gem install sqlite3-ruby Which fails with Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. So I install it via apt-get sudo aptitude install libsqlite3-ruby1.8. And still get same error on rake db:create.

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  • Using JSON input in Ruby method on Rails

    - by Zachary
    I am using jQuery to make an AJAX call to a ruby method in my controller. The javascript looks something like this: var latLongJSON = { "address": [ {"lat" : 50, "long" : 50} ] }; var returnedAddresses; $.ajax({ type: "GET", data: latLongJSON, url: "map/getaddresses", success: function(data) { returnedAddresses = JSON.parse(data); } }); Then in my 'getaddresses' method, my parameter coming through looks like: Parameters: {"address"=>"[object Object]"} I'm not sure what to do with this. I'm fairly new to Ruby, and I'm not sure if I need to convert this to something else, or what. Ideally I want to be able to pass in multiple sets of lat/long in the 'address' array, then be able to iterate over those in my Ruby code.

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  • Generating Google Maps markers using Ruby

    - by ischnura
    I would like to do a very simple task: add some markers in a Google Map using a list of addresses from an array. I have been thinking about generating the Google Maps JavaScript API code using ruby (printf) but this does not seem like a very clean and beautiful solution... I have read about YM4R for Ruby on Rails... my project is pretty simple and I have never worked with Ruby on Rails... I have also never used JQuerry... but I am very willing to learn to use this tools :) What do you think will be the best approach to generating the markers?

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  • Rails: simple bundler question with ruby-openid

    - by Joern Akkermann
    Hi! I just installed the ruby-openid gem and then bundled it by entering gem 'ruby-openid', :require => 'openid' in the gemfile. Then I started bundle install and bundle lock. Everything worked fine so far. But how can I now access the classes of ruby-openid. OpenID::method won't work for me. It raises a not found error. What have I forgot or done wrong? I'm absolutely new to bundler and the internet full of solutions for various versions, but I need one solution that's surely working. I'm thankful for any help!

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  • Most useful Rails plugins, Ruby libraries and Ruby gems?

    - by Srinivas Iyer
    I have seen many sites which provide the whole list of Rails plugins, Ruby libraries and Ruby gems, but we hardly use few of them and some may not suit our requirement and we spend a whole lot of time searching for useful plugins which suits our requirement. I have created this poll, people can post useful libraries, gems and plugins which they have come across. It would be great help for newbies like me and to the entire Ruby on Rails community. Note: to keep this poll as useful as possible, please remember: Post only one library, gem, or plugin per answer Mention the name of the library, gem, or plugin which you find it useful. URL of the location of the resource We don't want duplicate answers, so before posting check if the library has been mentioned already. Thanks

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  • Could not load ruby textmate?

    - by mchenja
    I have a MacBook Pro, running Mavericks, but I'm not too acquainted with its inner workings. I'm just a humble CS student. After install Ruby 1.9.3 and Rails 4.0.0, I get this annoying message every time I open a new terminal window: Unknown ruby interpreter version (do not know how to handle): textmate. Could not load ruby textmate. The message is in bright red, so it worries me. What can I do to fix it/get rid of it? Thanks! EDIT: As it turns out, the message stopped showing, but I can't recall what I did to make it stop. In any case - thanks for reading!

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  • What does the * symbol do near a function argument and how to use that in others scenarios?

    - by user502052
    I am using Ruby on Rails 3 and I would like to know what means the presence of a *simbol near a function argument and to understand its usages in others scenarios. Example scenario (this method was from the Ruby on Rails 3 framework: def find(*args) return to_a.find { |*block_args| yield(*block_args) } if block_given? options = args.extract_options! if options.present? apply_finder_options(options).find(*args) else case args.first when :first, :last, :all send(args.first) else find_with_ids(*args) end end end

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  • Problem in Rail Casts Episode 190

    - by Gautam
    Hello, This is the code I have written require 'rubygems' require 'nokogiri' require 'open-uri' url = "http://timesofindia.indiatimes.com/rssfeeds/-2128838597.cms" doc = Nokogiri::HTML(open(url)) puts doc.at_css("title").text and I am getting this output. I have installed Nokogiri. I use Windows 7 C:\Ruby>ruby hello.rb C:/Ruby/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.2-x86-mingw32/lib/nokogiri/nokogiri.rb:1:in `require': 127: The specified procedure could not be found. - Init_nokogiri (LoadError) C:/Ruby/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.2-x86-mingw32/lib/nokogiri/1.9/nokogiri.so from C:/Ruby/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.2-x86-mingw32/lib/nokogiri/nokogiri.rb:1:in `<top (required)>' from C:/Ruby/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.2-x86-mingw32/lib/nokogiri.rb:13:in `require' from C:/Ruby/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.2-x86-mingw32/lib/nokogiri.rb:13:in `<top (required)>' from hello.rb:2:in `require' from hello.rb:2:in `<main>'

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  • Languages on embedded systems in aeronautic and spatial sector

    - by Niels
    I know that my question is very broad but a general answer would be nice. I would like to know which are the main languages used in aeronautic and spatial sector. I know that the OS which run on embedded systems are RTOS (Real time OS) and I think that, this languages must be checked correctly by different methods (formal methods, unit tests) and must permit a sure verification of whole process of a program.

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  • Java SE Embedded-Enabled Raspberry Pi Ice Bucket Challenge

    - by hinkmond
    Help fight ALS at: http://www.alsa.org/fight-als/ See: Java SE Embedded-Enabled Raspberry Pi Ice Bucket Challenge My Java SE Enabled Raspberry Pi accepts the nomination for the ALS Ice Bucket Challenge and I hereby nominate the Nest thermostat, the Fitbit fitness tracker, and Apple TV. Take the Ice Bucket Challenge. Help find the cure for ALS: http://www.alsa.org/fight-als/ice-bucket-challenge.html Hinkmond

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  • RPi and Java Embedded GPIO: It all begins with hardware

    - by hinkmond
    So, you want to connect low-level peripherals (like blinky-blinky LEDs) to your Raspberry Pi and use Java Embedded technology to program it, do you? You sick foolish masochist. No, just kidding! That's awesome! You've come to the right place. I'll step you though it. And, as with many embedded projects, it all begins with hardware. So, the first thing to do is to get acquainted with the GPIO header on your RPi board. A "header" just means a thingy with a bunch of pins sticking up from it where you can connect wires. See the the red box outline in the photo. Now, there are many ways to connect to that header outlined by the red box in the photo (which the RPi folks call the P1 header). One way is to use a breakout kit like the one at Adafruit. But, we'll just use jumper wires in this example. So, to connect jumper wires to the header you need a map of where to connect which wire. That's why you need to study the pinout in the photo. That's your map for connecting wires. But, as with many things in life, it's not all that simple. RPi folks have made things a little tricky. There are two revisions of the P1 header pinout. One for older boards (RPi boards made before Sep 2012), which is called Revision 1. And, one for those fancy 512MB boards that were shipped after Sep 2012, which is called Revision 2. So, first make sure which board you have: either you have the Model A or B with 128MB or 256MB built before Sep 2012 and you need to look at the pinout for Rev. 1, or you have the Model B with 512MB and need to look at Rev. 2. That's all you need for now. More to come... Hinkmond

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  • Better Embedded 2013

    - by Valter Minute
    Originally posted on: http://geekswithblogs.net/WindowsEmbeddedCookbook/archive/2013/07/30/better-embedded-2013.aspx On July 8th and 9th I had a chance to attend and speak at the Better Embedded 2013 conference in Florence. Visiting Florence is always a pleasure, but having a chance to attend to such an interesting conference and to meet Marco Dal Pino, Paolo Patierno, Mirco Vanini and many other embedded developers made those two days an experience to be remembered. I did two sessions, one on Windows Embedded Standard and “PCs” usage in the embedded world and another one on Android for Embedded devices, you can find the slides on the better embedded website: www.betterembedded.it. You can also find slides for many other interesting session, ranging from the .NET microframework to Linux Embedded, from QT Quick to software licenses. Packing many different resources about embedded systems in a conference was not easy but the result is a very nice mix of contents ranging from firmware development to cloud-based systems. This is a great way to have an overview of what’s new or interesting in embedded systems and to get great ideas about how to build your new device. Don’t forget to follow @Better_Embedded on twitter to not miss next year conference! Thanks to the better embedded team for having allowed me to use some of the official pictures in this blog post. You can find a good selection of those pictures (just to experience the atmosphere of the conference) on its Facebook page: http://dvlr.it/DHDB

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  • Videos: Getting Started with Java Embedded

    - by Tori Wieldt
    Are you a Java developer? That means you can write applications for embedded processors! There are new six new videos up on the YouTube/Java channel that you can watch to get more information. To get an overview, watch James Allen of Oracle Global Business Development give OTN a tour of the Oracle booth at ARM Techcon. He also explains the huge opportunity for Java in the embedded space. These videos from Oracle Engineering show you how to leverage your knowledge to seamlessly develop in a space that is really taking off. Java SE Embedded Development Made Easy, Part 1 This video demonstrates how developers already familiar with the Java SE development paradigm can leverage their knowledge to seamlessly develop on very capable embedded processors. Part one of a two-part series. Java SE Embedded Development Made Easy, Part 2 This video demonstrates how developers already familiar with the Java SE development paradigm can leverage their knowledge to seamlessly develop on very capable embedded processors. Part two of a two-part series. Mobile Database Synchronization - Healthcare Demonstration This video demonstrates how a good portion of Oracle's embedded technologies (Java SE-Embedded, Berkeley DB, Database Mobile Server) can be applied to a medical application. Tomcat Micro Cluster See how multiple embedded devices installed with Java Standard Edition HotSpot for Armv5/Linux and Apache Tomcat can be configured as a micro cluster. Java Embedded Partnerships Kevin Smith of Oracle Technical Business Development explains what's new for partners and Java developers in the embedded space. Learn how you can start prototyping for Qualcomm's new Orion board before it's available. (Sorry about the video quality, the booth lights were weird.)   Visit the YouTube/Java channel for other great Java videos. <fade to black>

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  • Local install of sqlite3-ruby

    - by Skully
    On my current system i dont have root-access and i want to install sqlite3-ruby. I can compile it and i know how to set custom install-folder, but how does my ruby-installation can recognize/find that installed gem for usage? I tried prefix of my custom RUBYLIB-Folder but that didnt work either. Any suggestions? Thanks skully

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  • Build a ruby daemon that integrates my rails environement

    - by jjmartres
    Hi guys, I need to build a ruby daemon that will use the freeswitcher eventmachine library for freeswitch. Since few days I as looking the web for the best solution to build a ruby daemon that will integrate my rails environment, specailly my active record models. I've take a look to the excellent Ryan Bates screencast (episodes 129 custom daemon) but I'm not sure that is still an actual solution. Does anyone known a good way to do that ? Thanks all for your help.

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  • How to install curl on windows for ruby on rails

    - by Gautam
    Hi, I am new to ruby on rails. Could you please help me to install curl. I have windows 7 and ruby 1.8.7 I need to install Paul Dix's FeedZirra. I need curl for that. Also could you help me with gem install curb. Even curb seems to need Curl Looking forward for your help Thank You Gautam

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  • when executing Powershell Script from Ruby "Can't convert true into String" error

    - by Ozie Harb
    I am trying to execute a powershell script from Ruby, I have entered the below command: scriptPath = system('powershell \"C:\\Scripts\\DB_Setup.ps1\"') The ruby Script is handling exceptions when an error is raised to stop the script as below command: rescue => ex message = "\nscript on server '#{`hostname`.strip()}' terminated unexpectedly:\n\nMessage: '#{ex.message}" raise ex Output Error: script on server 'TestDB1' terminated unexpectedly: Message: 'can't convert true into String' Thanks

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  • Ruby generic filesystem libraries

    - by webdestroya
    I am looking for a "Virtual File System" type library for ruby. I want to be able to have a completely generic file system that I can easily switch between using Local files and using S3 or using FTP or something like that. (Identical to VFS for Java) Has anybody used any type of generic file system for ruby (I just need it to support local files and Amazon S3) Any pointers would be much appreciated.

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  • Who's using Ruby on Rails in production?

    - by Jekke
    I've been kicking around Ruby and the rails framework and have been considering recommending to a client-of-a-client that they use it to rebuild their site, which is currently built in very bad ASP classic that will have to be rewritten from the ground up regardless of what technology is used. One thing I'm missing from my pitch is a list of major sites using Ruby-on-Rails. Are there any yet?

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  • Parametrized get request in Ruby?

    - by Horace Loeb
    How do I make an HTTP GET request with parameters in Ruby? It's easy to do when you're POSTing: require 'net/http' require 'uri' HTTP.post_form URI.parse('http://www.example.com/search.cgi'), { "q" => "ruby", "max" => "50" } But I see now way of passing GET parameters as a hash using net/http.

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