# Latest **URL:** https://www.ruby-forum.com/latest.md?page=513 [Latest](https://www.ruby-forum.com/latest.md) · [Categories](https://www.ruby-forum.com/categories.md) · [Tags](https://www.ruby-forum.com/tags.md) **Page:** 514 --- ## [GnuRadio in particle accelerators](https://www.ruby-forum.com/t/gnuradio-in-particle-accelerators/237089)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [October 24, 2013, 1:56pm UTC](https://www.ruby-forum.com/t/gnuradio-in-particle-accelerators/237089 "2013-10-24T13:56:00Z")
Hi, people. Anyone here has experience using Gnuradio or USRP as an instrumentation tool (I mean, not for actual radio transmissions)? After years studying, hobbying and working with SDR, I’ve just learned that they a… --- ## [Zigbee](https://www.ruby-forum.com/t/zigbee/246497)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [October 24, 2013, 1:15pm UTC](https://www.ruby-forum.com/t/zigbee/246497 "2013-10-24T13:15:41Z")
I’m looking for a packet sniffer for zigbee. Is there a sample of how to do this with a RTL? The one I found on google used a FPGA. Thanks, -d --- ## [Normal For Loop](https://www.ruby-forum.com/t/normal-for-loop/130806)
**Author:** [@cory](https://www.ruby-forum.com/u/cory)\ **Replies:** 23\ **Last updated:** [October 24, 2013, 12:11pm UTC](https://www.ruby-forum.com/t/normal-for-loop/130806 "2013-10-24T12:11:19Z")
I’m new to Ruby. Is there such thing as a C++ style (and most others) for loop in Ruby? What I mean by that is: for( init, while-condition, increment ) { function-here } I know I can do that with a while loop, but I… --- ## [Some questions on ruby - case2(can carry local variable through scope of block?)](https://www.ruby-forum.com/t/some-questions-on-ruby-case2-can-carry-local-variable-through-scope-of-block/237103)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 3\ **Last updated:** [October 24, 2013, 11:53am UTC](https://www.ruby-forum.com/t/some-questions-on-ruby-case2-can-carry-local-variable-through-scope-of-block/237103 "2013-10-24T11:53:00Z")
\########################## cat case2.rb ########################## #!/usr/bin/env ruby def check\_status(servers) servers.each do |server| # … Skip some code # if server status is up status = ‘up’ end return st… --- ## [Some questions on ruby - is any variable in ruby can control trace back limit?](https://www.ruby-forum.com/t/some-questions-on-ruby-is-any-variable-in-ruby-can-control-trace-back-limit/237101)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 24, 2013, 10:56am UTC](https://www.ruby-forum.com/t/some-questions-on-ruby-is-any-variable-in-ruby-can-control-trace-back-limit/237101 "2013-10-24T10:56:33Z")
When click CTRL-C when ruby script running, it always give trace back. Is there way to make no trace back? I know setting below can solve this issue, but I want to know whether any variable in ruby(maybe somthing like… --- ## [Old rails project, new machine](https://www.ruby-forum.com/t/old-rails-project-new-machine/237081)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 16\ **Last updated:** [October 24, 2013, 10:22am UTC](https://www.ruby-forum.com/t/old-rails-project-new-machine/237081 "2013-10-24T10:22:06Z")
I have an older rails app that runs on an old, windows machine that i ned to port to a more modern linux. The app is written using ruby 1.8.6 (2010-09-02 patchlevel 420) \[i686-linux\] with rails 2.3.2. I have installe… --- ## [Behavior of 'Open3.popen3' is different when use ruby 1.8.6 and 1.9.3, any solution?](https://www.ruby-forum.com/t/behavior-of-open3-popen3-is-different-when-use-ruby-1-8-6-and-1-9-3-any-solution/237078)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 4\ **Last updated:** [October 24, 2013, 10:07am UTC](https://www.ruby-forum.com/t/behavior-of-open3-popen3-is-different-when-use-ruby-1-8-6-and-1-9-3-any-solution/237078 "2013-10-24T10:07:20Z")
\#!/usr/bin/env ruby require ‘open3’ x = ‘abc’ stdin, stdout, stderr = Open3.popen3("#{x}") puts “go on running …” ‘abc’ is an unix command that doesn’t exist. Use ruby 1.8.6 The error run popen3 stored in stderr, … --- ## [Gnuradio compile error about GNURADIO\_RUNTIME\_INCLUDE\_DIRS](https://www.ruby-forum.com/t/gnuradio-compile-error-about-gnuradio-runtime-include-dirs/246490)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [October 24, 2013, 5:36am UTC](https://www.ruby-forum.com/t/gnuradio-compile-error-about-gnuradio-runtime-include-dirs/246490 "2013-10-24T05:36:57Z")
when I compile the gr-osmosdr,such error happens,like: Found PkgConfig: C:/Program Files/gnuradio/bin/pkg-config.exe (found version “0.26”) Checking for GNU Radio Module: RUNTIME checking for module ‘gnuradio-runtim… --- ## [BladRF](https://www.ruby-forum.com/t/bladrf/237060)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 24, 2013, 5:04am UTC](https://www.ruby-forum.com/t/bladrf/237060 "2013-10-24T05:04:14Z")
I am working on bladeRF, dose anyone working on it and facing this error? Ubuntu 13.04 linux; GNU C++ version 4.7.3; Boost\_105300; UHD\_003.005.004-140-gfb32ed16 \<\<\< Welcome to GNU Radio Companion 3.7.1 \>\>\> i got th… --- ## [\[ruby-trunk - Bug #9045\]\[Open\] URIに含まれるエンコードされたID/パスワードがデコードされない](https://www.ruby-forum.com/t/ruby-trunk-bug-9045-open-uri-id/246471)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 4\ **Last updated:** [October 24, 2013, 4:34am UTC](https://www.ruby-forum.com/t/ruby-trunk-bug-9045-open-uri-id/246471 "2013-10-24T04:34:25Z")
Issue #9045 has been reported by vmi (Motonori IWAMURO). Bug #9045: URIに含まれるエンコードされたID/パスワードがデコードされない Author: vmi (Motonori IWAMURO) Status: Open Priority: Normal Assignee: Category: lib Target version: ruby -v… --- ## [\[ANN\] Rails 4.0.1.rc3 has been released!](https://www.ruby-forum.com/t/ann-rails-4-0-1-rc3-has-been-released/237097)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [October 24, 2013, 3:43am UTC](https://www.ruby-forum.com/t/ann-rails-4-0-1-rc3-has-been-released/237097 "2013-10-24T03:43:36Z")
We found one regression on Active Model, so I’m releasing another release candidate. Here are the changes from 4.0.1.rc2 to 4.0.1.rc3: https://github.com/rails/rails/compare/v4.0.1.rc2...v4.0.1.rchttps://github.com/r… --- ## [Re: GNURadio Run with USRP2 Hangs on Execution](https://www.ruby-forum.com/t/re-gnuradio-run-with-usrp2-hangs-on-execution/237099)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 24, 2013, 2:07am UTC](https://www.ruby-forum.com/t/re-gnuradio-run-with-usrp2-hangs-on-execution/237099 "2013-10-24T02:07:45Z")
Ian: Thank you for your detailed response. If I stick with eight bits and increase to 50Msps, will that solve the decimation rate problem? I realize this would result in a decimation rate of two, which would not be i… --- ## [GNURadio Run with USRP2 Hangs on Execution](https://www.ruby-forum.com/t/gnuradio-run-with-usrp2-hangs-on-execution/237098)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [October 24, 2013, 1:36am UTC](https://www.ruby-forum.com/t/gnuradio-run-with-usrp2-hangs-on-execution/237098 "2013-10-24T01:36:47Z")
I finally got my GNURadio Python script running, but after I execute the script, I get a UHD Warning about requested decimation (a few lines of text), then a single 0 on a newline, and nothing. I let it run for about … --- ## [Sending file through tx\_ofdm.grc in gnuradio 3.7.1](https://www.ruby-forum.com/t/sending-file-through-tx-ofdm-grc-in-gnuradio-3-7-1/237084)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 24, 2013, 12:06am UTC](https://www.ruby-forum.com/t/sending-file-through-tx-ofdm-grc-in-gnuradio-3-7-1/237084 "2013-10-24T00:06:48Z")
Hi all, I want to transmit a file through tx\_ofdm.grc model and receive it in using rx\_ofdm.grc. Presently this simulation takes in a vector source of packet length as input and it creates tags for it. I am able to r… --- ## [What is best way to document RoR app for 3rd party devs?](https://www.ruby-forum.com/t/what-is-best-way-to-document-ror-app-for-3rd-party-devs/237096)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 11:43pm UTC](https://www.ruby-forum.com/t/what-is-best-way-to-document-ror-app-for-3rd-party-devs/237096 "2013-10-23T23:43:24Z")
Hi all, My role at my job is evolving away from rails dev and into a completely different field and I have been asked to document my rails app so that others can maintain/enhance it in the future. What are the best w… --- ## [Misc questions, regarding Interrupt coalescing](https://www.ruby-forum.com/t/misc-questions-regarding-interrupt-coalescing/237050)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 2\ **Last updated:** [October 23, 2013, 11:39pm UTC](https://www.ruby-forum.com/t/misc-questions-regarding-interrupt-coalescing/237050 "2013-10-23T23:39:54Z")
Hello GR Forum, I got some questions: 1/ Did anyone already tested the effect of Interrupt coalescing on reducing the latency when host and USRP N2X0 are communicating and how far did he reduce this latency 2/ I wa… --- ## [Whats is the correct message sequence for nginx server?](https://www.ruby-forum.com/t/whats-is-the-correct-message-sequence-for-nginx-server/246500)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [October 23, 2013, 11:28pm UTC](https://www.ruby-forum.com/t/whats-is-the-correct-message-sequence-for-nginx-server/246500 "2013-10-23T23:28:48Z")
I am running nginx-1.5 server and sending chrome browser simple websocket request. My nginx server is confgiured with hello module which is supposed to send “Hello world” in response. As per RFC for websocket, a sev… --- ## [Behaviour of gs-osmosdr when multiple devices in the source](https://www.ruby-forum.com/t/behaviour-of-gs-osmosdr-when-multiple-devices-in-the-source/246501)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 4\ **Last updated:** [October 23, 2013, 11:00pm UTC](https://www.ruby-forum.com/t/behaviour-of-gs-osmosdr-when-multiple-devices-in-the-source/246501 "2013-10-23T23:00:45Z")
I’m trying to understand the behaviour for gr-osmosdr when you have multiple devices in the source – does it start delivering samples immediately, or is there a synchronization point, so that all devices start delive… --- ## [Dry in Rails](https://www.ruby-forum.com/t/dry-in-rails/246503)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 2\ **Last updated:** [October 23, 2013, 10:50pm UTC](https://www.ruby-forum.com/t/dry-in-rails/246503 "2013-10-23T22:50:52Z")
Hi all, Could you please view my rails project. What I do wrong. That is DRY principle. My git repo: https://github.com/alexfer/task-manager/tree/master/app --- ## [Problem with airprobe](https://www.ruby-forum.com/t/problem-with-airprobe/237095)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 8:01pm UTC](https://www.ruby-forum.com/t/problem-with-airprobe/237095 "2013-10-23T20:01:56Z")
Hi, I am trying to decode gsm control channel using usrp+gnuradio+airprobe. I get the cfile using ./gsm\_scan.py -re -d164 -c643 -pe . But when i try to decode this cfile, I get a file which is not properly decoded. I … --- ## [DySPAN call for papers deadline extended](https://www.ruby-forum.com/t/dyspan-call-for-papers-deadline-extended/237090)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 7:51pm UTC](https://www.ruby-forum.com/t/dyspan-call-for-papers-deadline-extended/237090 "2013-10-23T19:51:23Z")
Hi everyone, At GRCon13, we discussed the importance of policy and regulatory aspects of spectrum and how it can impact GNU Radio as well as how we could possibly impact it. The IEEE DySPAN symposium is a great place… --- ## [QT GUI Range - broken in GRC 3.7.2git-107-g636140af?](https://www.ruby-forum.com/t/qt-gui-range-broken-in-grc-3-7-2git-107-g636140af/237068)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 23, 2013, 7:23pm UTC](https://www.ruby-forum.com/t/qt-gui-range-broken-in-grc-3-7-2git-107-g636140af/237068 "2013-10-23T19:23:19Z")
Have updated to the latest git, been a month or two since the last update here. Previous 3.7.2git (a little back) ran fine. With the latest, flowgraphs seem to start but immediately exit (‘done’) when there is a QT … --- ## [Github issue tracking](https://www.ruby-forum.com/t/github-issue-tracking/237093)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 7:21pm UTC](https://www.ruby-forum.com/t/github-issue-tracking/237093 "2013-10-23T19:21:43Z")
Hi! I was wondering if anyone has used the http://www.railstracker.com engine for Github issue tracking? I’ve been looking for something so my users can monitor stories/bugs i’m working on. --- ## [Google Summer of Code 2014](https://www.ruby-forum.com/t/google-summer-of-code-2014/237087)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 5:47pm UTC](https://www.ruby-forum.com/t/google-summer-of-code-2014/237087 "2013-10-23T17:47:27Z")
Dear students, dear prospective mentors, Google has already put out the word that GSoC will continue next year. Given the huge success of our summer of code, we’re pretty sure we’ll also continue participating. Of co… --- ## [Ruby - Ruote](https://www.ruby-forum.com/t/ruby-ruote/237061)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 8\ **Last updated:** [October 23, 2013, 5:32pm UTC](https://www.ruby-forum.com/t/ruby-ruote/237061 "2013-10-23T17:32:14Z")
Good afternoon, in order to complete a task for a schoolar subject me and my group had to install Ruote. We have already installed ruby and we managed how to install Ruote but we can’t understand how it works or it is… --- ## [Passing strings into html and not converting to hex (I think)](https://www.ruby-forum.com/t/passing-strings-into-html-and-not-converting-to-hex-i-think/246499)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 5:21pm UTC](https://www.ruby-forum.com/t/passing-strings-into-html-and-not-converting-to-hex-i-think/246499 "2013-10-23T17:21:14Z")
Hello all. I need pass this without it changing the &, and = into %26, and %3D. \<%= @esearch.search q:params\[:query\]+‘&pretty=true’ do %\> Everything else is working fine, its just passing this ; GET http://localhost:… --- ## [Encoding for system calls on Windows](https://www.ruby-forum.com/t/encoding-for-system-calls-on-windows/246485)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [October 23, 2013, 4:47pm UTC](https://www.ruby-forum.com/t/encoding-for-system-calls-on-windows/246485 "2013-10-23T16:47:47Z")
I am trying to understand how encoding interacts with system calls, particularly on Windows. I suspect there may be a bug in ruby on how it invokes system calls with non-ASCII characters in the command. I have a demo… --- ## [NGINX and php-fpm -\> HTML runs, php gives 502](https://www.ruby-forum.com/t/nginx-and-php-fpm-html-runs-php-gives-502/237085)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 23, 2013, 4:39pm UTC](https://www.ruby-forum.com/t/nginx-and-php-fpm-html-runs-php-gives-502/237085 "2013-10-23T16:39:00Z")
hi, apparently have some problems with it so I am not better . Unfortunately, past attempts have brought nothing to use the information from other posts . And so , I really hope that this one can help ^ ^ So, I have… --- ## [String interpolation](https://www.ruby-forum.com/t/string-interpolation/237074)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 2\ **Last updated:** [October 23, 2013, 4:35pm UTC](https://www.ruby-forum.com/t/string-interpolation/237074 "2013-10-23T16:35:29Z")
Hi! I’m confronted with some problems in strings. If I create string like this one: junk = “You junked %{item}” Then I can put text into it like this: junk % { :item =\> ‘some item’ } But if I get this string: … --- ## [Rails fckeditor plugin in 2 forms in a view page](https://www.ruby-forum.com/t/rails-fckeditor-plugin-in-2-forms-in-a-view-page/237088)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [October 23, 2013, 3:07pm UTC](https://www.ruby-forum.com/t/rails-fckeditor-plugin-in-2-forms-in-a-view-page/237088 "2013-10-23T15:07:48Z")
Hi, I have a view page where there are 2 forms and each form have fckeditor textarea. . SO initially both forms will be hidden on page load. When I click on a link1, the form1 div will be shown and form2 will be hidde… [Previous page](https://www.ruby-forum.com/latest.md?page=512) [Next page](https://www.ruby-forum.com/latest.md?page=514)