Search Results

Search found 13055 results on 523 pages for 'embedded ruby'.

Page 38/523 | < Previous Page | 34 35 36 37 38 39 40 41 42 43 44 45  | Next Page >

  • Need some ignition in Embedded Systems

    - by Rahul
    I'm very much interested in building applications for Embedded Devices. I'm in my 3rd year Electrical Engineering and I'm passionate about coding, algorithms, Linux OS, etc. And also by Googling I found out that Linux OS is one of the best OSes for Embedded devices(may be/may not be). I want to work for companies which work on mobile applications. I'm a newbie/naive to this domain & my skills include C/C++ & MySQL. I need help to get started in the domain of Embedded Systems; like how/where to start off, Hardware prerequisites, necessary programming skills, also what kind of Embedded Applications etc. I've heard of ARM, firmware, PIC Micorcontrollers; but I don't know anything & just need proper introduction about them. Thanx. P.S: I'm currently reading Bjarne Struotsup's lecture in C++ at Texas A&M University, and one chapter in it describes about Embedded Systems Programming.

    Read the article

  • What is the best way to add categories to posts - Ruby on Rails blog...

    - by bgadoci
    I am new to Ruby and Rails so bear with me please. I have created a very simple blog application with both posts and comments. Everything works great. My next question regarding adding categories. I am wondering the best way to do this. As I can't see too far in front of me yet when it comes to Rails I thought I would ask. To be clear, I would like that a single post can have multiple categories and a category can have multiple posts. Is the best way to do this to create a 'categories' table and then use the posts and categories models to do has_many :posts, has_many :categories? Would I also then set the routes.rb such that posts are embedded under categories? Or is there an easier way by simply adding a category column to the existing posts table? (in which case I would imagine having multiple categories would be difficult).

    Read the article

  • How to: Simulating keystroke inputs in shell to an app running in an embedded target

    - by fzkl
    I am writing an automation script that runs on an embedded linux target. A part of the script involves running an app on the target and obtaining some data from the stdout. Stdout here is the ssh terminal connection I have to the target. However, this data is available on the stdout only if certain keys are pressed and the key press has to be done on the keyboard connected to the embedded target and not on the host system from which I have ssh'd into the target. Is there any way to simulate this? Edit: Elaborating on what I need - I have an OpenGL app that I run on the embedded linux (works like regular linux) target. This displays some graphics on the embedded system's display device. Pressing f on the keyboard connected to the target outputs the fps data onto the ssh terminal from which I control the target. Since I am automating the process of running this OpenGL app and obtaining the fps scores, I can't expect a keyboard to be connected to the target let alone expect a user to input a keystroke on the embedded target keyboard. How do I go about this? Thanks.

    Read the article

  • Running Ruby app on Apache

    - by TandemAdam
    I have been learning Ruby lately, and I want to upload a test web application to my server. But I can't figure out how to get it to run on my shared hosting. My Hosting Details Shared Hosting with JustHost (see here for list of features) OS: Linux Apache: 2.2.11 cPanel: 11.25.0-STABLE No SSH access. Can install Ruby Gems. Can't install Apache modules. Can "Manage Ruby on Rails Applications" through cPanel. Mongrel gem is installed. I built the following simple HelloWorld Ruby Rack app using Sinatra: #!/usr/bin/ruby ruby require 'rubygems' require 'sinatra' get '/hi' do "Hello World!" end I just can can't figure out how to "start" the application. Do I need to tell Mongrel (or maybe Apache) that the application exists somehow? How do I start this app running? I am happy to provide more info if needed.

    Read the article

  • Resources for memory management in embedded application

    - by Elazar Leibovich
    How should I manage memory in my mission critical embedded application? I found some articles with google, but couldn't pinpoint a really useful practical guide. The DO-178b forbids dynamic memory allocations, but how will you manage the memory than? preallocate everything in advance and send a pointer to each function that needs allocation? Allocate it on the stack? Use a global static allocator (but then it's very similar to dynamic allocation)? Answers can be of the form of regular answer, reference to a resource, or reference to good opensource embedded system for example. clarification: The issue here is not whether or not memory management is availible for the embedded system. But what is a good design for an embedded system, to maximize reliability.

    Read the article

  • Trouble installing Windows Embedded Standard 2009

    - by Tim
    Getting the following error when attempting to install: Error attempting to create the destination file: C:\Windows Embedded Data\Repositories\{25C88912-9870-4686-97CE-8244C A1B0DAB}.CAB. System error code: 5 Code 5 looks to be an "Access denied" issue. Not sure if this is a generic Windows error, or specific to this install. Any insight is appreciated! -Tim

    Read the article

  • Embedded programming books

    - by Velho Kerho
    What embedded programming/design books would you suggest? With embedded I mean near to hardware programming in ASM and C/C++. I'm looking something related to best practices in embedded programming/design. Operation system could be Linux, Real Time Linux or any other RTOS.

    Read the article

  • Hard drive restore on reboot on windows embedded

    - by sav
    My company has an old out of service device with windows embedded on it that we want to re purpose. Any changes to the drive (SD Card with 2 partitions), (ie: installed software, ip address, system settings, files) are reset/deleted when we reboot the device. We can successfully make changes to the drive by plugging it into a PC, but that has its limitations and we would like to be able to use our device. Can anyone tell us more about the technology used for doing this and how/if we can disable it?

    Read the article

  • Ruby: Parse Excel 95-2003 files?

    - by Larry K
    Is there a way to read Excel 97-2003 files from Ruby? Background I'm currently using the Ruby Gem parseexcel -- http://raa.ruby-lang.org/project/parseexcel/ But it is an old port of the perl module. It works fine, but the latest format it parses is Excel 95. And guess what? Excel 2007 will not produce the Excel 95 format. John McNamara has taken over duties as the maintainer for the Perl Excel parser, see http://search.cpan.org/~jmcnamara/Spreadsheet-ParseExcel-0.55/lib/Spreadsheet/ParseExcel.pm The current version will parse Excel 95-2003 files. But is there a port to Ruby? My other thought is to build some Ruby to Perl glue code to enable use of the Perl library itself from Ruby. Eg, see http://stackoverflow.com/questions/451636/whats-the-best-way-to-export-utf8-data-into-excel/620612#620612 (I think it would be much faster to write the glue code than to port the parser.) Thanks, Larry

    Read the article

  • Why is Python used for high-performance/scientific computing (but Ruby isn't)?

    - by Cyclops
    There's a quote from a PyCon 2011 talk that goes: At least in our shop (Argonne National Laboratory) we have three accepted languages for scientific computing. In this order they are C/C++, Fortran in all its dialects, and Python. You’ll notice the absolute and total lack of Ruby, Perl, Java. It was in the more general context of high-performance computing. Granted the quote is only from one shop, but another question about languages for HPC, also lists Python as one to learn (and not Ruby). Now, I can understand C/C++ and Fortran being used in that problem-space (and Perl/Java not being used). But I'm surprised that there would be a major difference in Python and Ruby use for HPC, given that they are fairly similar. (Note - I'm a fan of Python, but have nothing against Ruby). Is there some specific reason why the one language took off? Is it about the libraries available? Some specific language features? The community? Or maybe just historical contigency, and it could have gone the other way?

    Read the article

  • Which PHP framework is closest to Ruby on Rails? CakePHP? CodeIgniter?

    - by Mike Duncan
    I'm going to be switching back and forth between Ruby on Rails projects and some as-of-yet undecided PHP MVC framework projects. Which of the PHP MVC frameworks out there (CakePHP, CodeIgniter?, others?) is most similar to Ruby on Rails in that the most conventions, locations, workflows, etc are preserved? I'm looking for the similarity in the way things are done such as directory structures, conventions, etc, not a pros vs cons in speed, extra features, etc.

    Read the article

  • What's new with Java technology? Java Embedded

    - by hinkmond
    As this article points out, Java Embedded is a safer, more robust and easier to develop platform for small networked devices. So, get ready for good things to come from Java Embedded... See: Java Embedded: Next New Thing Here's a quote: Through the past few years the industry as we know it has seen a big boom with the mobile and cloud revolution. Today, there has been an enormous amount of buzz around machine to machine (M2M) or the "Internet of Things," since we are moving into a state where everything is going to have to be interconnected and will have to properly communicate together... Today, Java Embedded provides that platform. I like it! As long as there's no Zombie Apocalypse, I think Java Embedded has a great future! Hinkmond

    Read the article

  • The Next Frontier: Java Embedded @ JavaOne

    - by Kristin Rose
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Now more than ever, the Java platform is the best technology for many embedded use cases. Java’s platform independence, high level of functionality, security, and developer productivity, address the key pain points in building embedded solutions... and that’s not just our opinion. Take a look at the new IDC report on Oracle’s stewardship of Java, “Java: Two and a half Years After the Acquisition” (doc #236309, August 2012). Java already powers around 3 billion devices worldwide, with traditional desktops and servers being only a small portion of that, and the ‘Internet of Things‘ is just really starting to explode. It is estimated that within five years, intelligent and connected embedded devices will outnumber desktops and mobile phones combined, and will generate the majority of the traffic on the Internet. Is your platform and services strategy ready for the coming disruptions and opportunities? It should come as no surprise that Oracle is enthusiastically focused on Java for Embedded .  New this year, Oracle is demonstrating its further commitment to the embedded marketplace by offering, for the first time, a dedicated conference focused on the business aspects of embedded Java: Java Embedded @ JavaOne. Co-located with the technically-focused JavaOne conference, Java Embedded @ JavaOne will run for two days in San Francisco targeting C-level executives, architects, business leaders, and decision makers. With 24 inspired business sessions with expert speakers from 18 prominent companies driving the next generation of Java Embedded business solutions (such as Cinterion, ARM, Hitachi and Rockwell Automation), attendees will learn how Java Embedded technologies and solutions can offer compelling value and a clear path forward to business efficiency and agility. You’ll also see how Oracle’s comprehensive technology portfolio can deliver a complete ‘Machine to Machine’ platform, from device to datacenter, resulting in a highly secure, resilient, high-performance and cost-effective solution. Seating is limited and we expect a lot of interest in this new event, so please register now! Note that if you are already attending the Oracle OpenWorld or JavaOne conferences, you can attend this conference for only $100 more. Watch my video below to find out more. I hope to see you there! Judson Althoff SVP of WWA&C Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

    Read the article

  • Oracle Unveils Oracle Java Embedded Suite 7.0

    - by user12612705
    Today Oracle announced the Oracle Java Embedded Suite 7.0. What is the Java Embedded Suite (JES)? It's a middleware stack designed to be run on embedded devices. It's a suite which includes an application server (Glassfish for Embedded Suite), database (Java DB), and web services (Jersey Web Services Framework). Putting these services on the embedded device gives you the ability to provide a set of services at the device point. It also lets you aggregate data at the device point, which you can later sync with your enterprise systems.

    Read the article

  • Oracle sort Java Embedded Suite 7.0 et Java ME Embedded 3.2, ses solutions dédiées aux dispositifs embarqués

    Oracle sort Java Embedded Suite 7.0 et Java ME Embedded 3.2 ses solutions dédiées aux dispositifs embarqués Oracle vient d'annoncer la publication d'Oracle Java Embedded Suite 7.0 et Oracle Java ME Embedded 3.2, ses outils pour le domaine de l'embarqué. Oracle Java Embedded Suite est une plateforme de développement qui facilite la création des applications pouvant s'exécuter à travers une large gamme de systèmes embarqués, y compris les équipements réseau, les imprimantes multifonctions, les appareils médicaux, etc. Cette nouvelle version de l'outil intègre par défaut des services Web, une base de données, un Framework d'application, tous optimisés pour les dispositifs embarqués. ...

    Read the article

  • Error installing geoip_city gem

    - by tomeara
    I keep getting an error when trying to install the geoip_city gem. I've already installed the GeoIP C library to /opt/GeoIP, but the gem doesn't seem to pick it up. I've tried: sudo gem install geoip_city -- --with-geoip-dir=/opt/GeoIP sudo gem install geoip_city -- --with-geoip-lib=/opt/GeoIP/lib sudo gem install geoip_city -- --with-geoip-dir=/opt/GeoIP --with-geoip-lib=/opt/GeoIP/lib all of which output this error: Building native extensions. This could take a while... ERROR: Error installing geoip_city: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb --with-geoip-lib=/opt/GeoIP/lib checking for GeoIP_record_by_ipnum() in -lGeoIP... no you must have geoip c library installed! *** extconf.rb failed *** 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. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby --with-geoip-dir --without-geoip-dir --with-geoip-include --without-geoip-include=${geoip-dir}/include --with-geoip-lib=${geoip-dir}/lib --with-GeoIPlib --without-GeoIPlib Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/geoip_city-0.2.0 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/geoip_city-0.2.0/gem_make.out

    Read the article

  • Share on Facebook, Retweet, etc, buttons in straight Ruby gem?

    - by Alexandre
    Notice those buttons atop http://techcrunch.com/2010/04/04/he-even-makes-coldplay-sound-fun/ for sharing the url on social networks? I want to do something very very similar for a site I'm building. ShareThis offers a widget that does the same thing but it's branded and external. I'm looking for a pure Ruby solution. A gem containing a module that could be included in a Rails ApplicationHelper class would be perfect. Suggestions appreciated before I go reinventing the wheel!

    Read the article

  • How to store Ruby method references in a database?

    - by Mad Wombat
    I am writing my first rails app. It needs to aggregate some data from multiple sites and for each site I have a unique way of getting the data (some provide RSS, some JSON, for some I scrape the HTML etc.). These will run on schedule, probably as a rake task from cron. It seems logical to store the sites and relevant information in a model, but I am not sure where to put unique data retrieval methods. Do I store method names in the model? Do I just name the methods the same as site name and call them that way? Basically, I need a way to read a list of sites and call appropriate method for each site. What is the Ruby on Rails way to do it?

    Read the article

  • can't activate rack problem while install spree commerce

    - by art
    I install spree version 0.9.4 with gem install spree and run a set up command spree mystore and get this errors messages. Have anybody experienced this whether in spree or not ? D:\Workspaces>spree mystore C:/Program Files/BitNami RubyStack/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:280:i n `activate': can't activate rack (>= 1.0.1, runtime) for ["spree-0.9.4"], alrea dy activated rack-1.0.0 for ["actionpack-2.3.5", "rails-2.3.5", "spree-0.9.4"] ( Gem::LoadError) from C:/Program Files/BitNami RubyStack/ruby/lib/ruby/site_ruby/1.8/ruby gems.rb:296:in `activate' from C:/Program Files/BitNami RubyStack/ruby/lib/ruby/site_ruby/1.8/ruby gems.rb:295:in `each' from C:/Program Files/BitNami RubyStack/ruby/lib/ruby/site_ruby/1.8/ruby gems.rb:295:in `activate' from C:/Program Files/BitNami RubyStack/ruby/lib/ruby/site_ruby/1.8/ruby gems.rb:68:in `gem' from C:/Program Files/BitNami RubyStack/ruby/bin/spree:18 Thanks

    Read the article

  • Get In That DB! Parsing CSV Using Ruby...

    - by keruilin
    I have a CSV file formatted just like this: name,color,tasty,qty apple,red,true,3 orange,orange,false,4 pear,greenish-yellowish,true,1 As you can see, each column in the Ruby OO world represents a mix of types -- string, string, boolean, int. Now, ultimately, I want to parse each line in the file, determine the appropriate type, and insert that row into a database via a Rails migration. For ex: Fruit.create(:name => 'apple', :color => 'red', :tasty => true, :qty => 3) Help!

    Read the article

  • How to deal with array of checkbox values in Ruby 1.9.1?

    - by Ola Tuvesson
    In Ruby 1.9.1 strings are no longer enumerable and string.each is undefined. This causes a problem when parsing values for an array of generated checkboxes since the field value, when submitted, becomes an array of strings. For example: <% for map in Map.find(:all) %> <%= check_box_tag "listing[map_ids][]", map.id %> <%= map.title %> <% end %> This will result in an error, undefined method `each' for "1":String, in process_parameter_filter because map_ids is being passed as "map_ids"=["1","2"] (if checkboxes with values 1 and 2 have been checked that is). What is the recommended way to fix this?

    Read the article

  • What does ruby include when it encounters the "include module" statement?

    - by Steve Weet
    If I have the following project structure project/ lib/ subproject/ a.rb b.rb lib.rb where lib.rb looks like this :- module subproject def foo do_some_stuff end end and a.rb and b.rb both need to mixin some methods within lib.rb and are both namespaced within a module like so :- require 'subproject/lib' module subproject class A include Subproject def initialize() foo() end end end What does ruby do when it encounters the include statement? How does it know that I want to only include the mixin from lib.rb rather than the whole module which includes both class A and class B, is this based purely on the require of subproject/lib or am I getting it wrong and it is including the whole of the module, including the definitions of Class A and B within themselves?

    Read the article

  • Do Ruby/Rails state machines exist that execute event transitions when a state change occurs?

    - by Bryan
    Hello All, Hopefully this isn't a silly question and I'm just not overlooking something in Ruby/Rails state machines (AASM, Transitions, AlterEgo, etc). From what I can tell, these state machine implementations operate on the preface that an event will get fired and the appropriate transition for that event will be triggered based on the old and new state. However, they don't seem to work the other way; say a user wants to change state from 'created' to 'assigned' and have the correct transition occur (rather than firing the event that causes the current state to be transitioned to the new state). Essentially, I want the user to be able to select a new state from a select box of available states and have the appropriate transition, guards, success callbacks, etc executed. Does anyone know if the existing state machine implementations support this?

    Read the article

  • Ruby on Rails - where to write business logic while processing a request? (newbie)

    - by Genadinik
    I am learning Ruby on Rails. I made a simple link like this: <%= link_to "Alex Link", alexes_path(@alex) %> then I routed it in routes.rb like this: resources :alexes get "home/index" then I am a bit unclear, but I think it goes to this part of the controller: def index #@alexes = Alex.all respond_to do |format| format.html # index.html.erb format.json { render json: @alexes } end end Am I correct that it goes to this part of the controller? Then nothing much happens and it goes to the next page which is index.html.rb under views\alexes So what I am wondering is - if I needed to do some business logic, would I write that in the controller snippet? Where inside the snippet? An example would be nice to take a look. Also, I would like to connect to a MongoDb database. Would I also write that in the middle of the controller? Thanks!

    Read the article

< Previous Page | 34 35 36 37 38 39 40 41 42 43 44 45  | Next Page >