# Latest **URL:** https://www.ruby-forum.com/latest.md?page=551 [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:** 552 --- ## [Concatenate two arrays](https://www.ruby-forum.com/t/concatenate-two-arrays/236366)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 10\ **Last updated:** [August 29, 2013, 10:58pm UTC](https://www.ruby-forum.com/t/concatenate-two-arrays/236366 "2013-08-29T22:58:38Z")
Hello again ruby community! I just learned how to add two arrays(I know, i know). My program looked like this array1=\[1,2,3\] array2=\[4,5,6\] array\_sum=array1+array2 I thought pretty simple stuff, they are combined. … --- ## [LDPC GSoC Project Status](https://www.ruby-forum.com/t/ldpc-gsoc-project-status/235875)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 10:49pm UTC](https://www.ruby-forum.com/t/ldpc-gsoc-project-status/235875 "2013-08-29T22:49:04Z")
Hi all, I’d just like to share a status of how my LDPC implementation project is going. When the summer started, Manu and I made a list of the LDPC-related algorithms for encoding, decoding, and parity check matrix c… --- ## [Strange SPDY behaviour about request time with stastic proxy cached content](https://www.ruby-forum.com/t/strange-spdy-behaviour-about-request-time-with-stastic-proxy-cached-content/246113)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 10:40pm UTC](https://www.ruby-forum.com/t/strange-spdy-behaviour-about-request-time-with-stastic-proxy-cached-content/246113 "2013-08-29T22:40:16Z")
Good time of day! We use nginx as load balancer and reverse proxy for some static content (images etc). And a problem was found with enabling SPDY: cached content with enabled SPDY becomes get from server with great… --- ## [Using Match with Regexp-Do not quite understand the formula](https://www.ruby-forum.com/t/using-match-with-regexp-do-not-quite-understand-the-formula/246078)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 4\ **Last updated:** [August 29, 2013, 7:48pm UTC](https://www.ruby-forum.com/t/using-match-with-regexp-do-not-quite-understand-the-formula/246078 "2013-08-29T19:48:00Z")
Hi Ruby on Rails community! I am trying to write a program that uses the .match command to find out if a string contains a certain word-then using that information write a conditional statement. The issue I am running… --- ## [Problem when using bundle exec rake with Launchd](https://www.ruby-forum.com/t/problem-when-using-bundle-exec-rake-with-launchd/236363)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 5\ **Last updated:** [August 29, 2013, 7:44pm UTC](https://www.ruby-forum.com/t/problem-when-using-bundle-exec-rake-with-launchd/236363 "2013-08-29T19:44:24Z")
Dear all, I am developing a web harvesting server which requires regularly website parsing. Since I use Mac 10.8 as my development environment, I try to use Launchd to routinely wake up my parser. My parser was a bash … --- ## [Check if variable exists in file, Using file contents for variable handling](https://www.ruby-forum.com/t/check-if-variable-exists-in-file-using-file-contents-for-variable-handling/246114)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 7:42pm UTC](https://www.ruby-forum.com/t/check-if-variable-exists-in-file-using-file-contents-for-variable-handling/246114 "2013-08-29T19:42:38Z")
Is there a way to check a variable against file contents for processing? A couple scenarios below. This is used here, but adding multiple agents can get burdensome: if ($http\_user\_agent ~ (agent1|agent2|Foo|Wget|Nmap… --- ## [Too fast can't read display](https://www.ruby-forum.com/t/too-fast-cant-read-display/246109)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 5\ **Last updated:** [August 29, 2013, 7:21pm UTC](https://www.ruby-forum.com/t/too-fast-cant-read-display/246109 "2013-08-29T19:21:52Z")
No troubles with scripts themselves, but my computer runs basic scripts so fast I can’t see the output. So I was wondering is there a command I can enter at the end of these scripts to slow them down or freeze the res… --- ## [Trying to create asset management app having trouble with edit page](https://www.ruby-forum.com/t/trying-to-create-asset-management-app-having-trouble-with-edit-page/246129)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 7:07pm UTC](https://www.ruby-forum.com/t/trying-to-create-asset-management-app-having-trouble-with-edit-page/246129 "2013-08-29T19:07:00Z")
i trying to create an asset management app. i am working through the ruby on rails 4.0 guide by Michael H. but in his guide it shows edit page for authenticated users i do not needthis function as the app will be depl… --- ## [Re: mathematics behind probe.level()](https://www.ruby-forum.com/t/re-mathematics-behind-probe-level/236365)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 7:01pm UTC](https://www.ruby-forum.com/t/re-mathematics-behind-probe-level/236365 "2013-08-29T19:01:43Z")
Marcus, Thanks for very nice explanation: so I see the code of this block with the help of your reply, and understand that how It is computing power for given N samples. i.e power= (sum of X\*\*2\[n\])/N where n goes fro… --- ## [Images with fingerprinting](https://www.ruby-forum.com/t/images-with-fingerprinting/236139)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 9\ **Last updated:** [August 29, 2013, 6:57pm UTC](https://www.ruby-forum.com/t/images-with-fingerprinting/236139 "2013-08-29T18:57:36Z")
Looking through the asset pipeline documentation, I was able to make everything work as expected. Really nice!! However, not for images that we are loading using a variable (i.e., wine.picture) which basically resol… --- ## [Extract multiple attributes from ruby array](https://www.ruby-forum.com/t/extract-multiple-attributes-from-ruby-array/236320)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 29, 2013, 6:57pm UTC](https://www.ruby-forum.com/t/extract-multiple-attributes-from-ruby-array/236320 "2013-08-29T18:57:35Z")
I have a student array object which returns multiple attributes. I need to extract only specific attributes from this array. How do I do it… @project.each do |p| @students \<\< Student.find\_by\_id(:id =\> p.recei… --- ## [Off-line signal processing (GR in slow motion)](https://www.ruby-forum.com/t/off-line-signal-processing-gr-in-slow-motion/236351)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 29, 2013, 6:04pm UTC](https://www.ruby-forum.com/t/off-line-signal-processing-gr-in-slow-motion/236351 "2013-08-29T18:04:24Z")
I know that a source block of live IQ samples set to a certain sampling rate is equivalent to a File source of IQ samples followed by a Throttle block set to that same sampling rate. So far so good. But suppose the sy… --- ## [Tengine-1.5.1 is released](https://www.ruby-forum.com/t/tengine-1-5-1-is-released/236367)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 29, 2013, 5:03pm UTC](https://www.ruby-forum.com/t/tengine-1-5-1-is-released/236367 "2013-08-29T17:03:37Z")
Hi folks, We are pleased to announce that Tengine-1.5.1 (stable version) has been released! You can either checkout the source code from GitHub: GitHub - alibaba/tengine: A distribution of Nginx with some advanced fe… --- ## [Mathematics behind probe.level()](https://www.ruby-forum.com/t/mathematics-behind-probe-level/246120)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 5:01pm UTC](https://www.ruby-forum.com/t/mathematics-behind-probe-level/246120 "2013-08-29T17:01:16Z")
Hi, I want to do energy detection of received signal, And after searching I was advised to use probe block to do the sense. (gr.probe\_avg\_mag\_sqrd\_f). Can anyone explain how this works. How level() method gives the e… --- ## [Segfaults when executing flowgraph](https://www.ruby-forum.com/t/segfaults-when-executing-flowgraph/236352)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 5:00pm UTC](https://www.ruby-forum.com/t/segfaults-when-executing-flowgraph/236352 "2013-08-29T17:00:05Z")
Hi, I seem to be having a problem where GRC works fine but when I execute the generated Python code (from within GRC or from command line) it just segfaults. So far it’s every flowgraph I’ve tried. The flowgraph I am … --- ## [Bug in GRC's tcp\_source block](https://www.ruby-forum.com/t/bug-in-grcs-tcp-source-block/246082)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 4:27pm UTC](https://www.ruby-forum.com/t/bug-in-grcs-tcp-source-block/246082 "2013-08-29T16:27:18Z")
Hi, I’ve now come across another issue with version 3.7. If I have a tcp source block in gnuradio-companion (in client mode), I get a stacktrace like this: Using Volk machine: sse4\_a\_64\_orc Traceback (most recent ca… --- ## [Post rendering templates](https://www.ruby-forum.com/t/post-rendering-templates/236304)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 3:08pm UTC](https://www.ruby-forum.com/t/post-rendering-templates/236304 "2013-08-29T15:08:25Z")
I’m looking to add text before the output of each template and partial to show the following: /path/to/erb/file or document.write … if it’s a javascript file. If I’m using tilt I also use templates for those notices… --- ## [Problem on 802.11a/g/p reciever -- crc wrong](https://www.ruby-forum.com/t/problem-on-802-11a-g-p-reciever-crc-wrong/246099)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 29, 2013, 2:33pm UTC](https://www.ruby-forum.com/t/problem-on-802-11a-g-p-reciever-crc-wrong/246099 "2013-08-29T14:33:43Z")
Hello everyone, I am working on a project to realize 802.11p transmission and receiving using USRP N210.My daughterboard is XCVR2450. I found some codes in the following page, which can sever as an IEEE 802.11a/g/p O… --- ## [The great articles](https://www.ruby-forum.com/t/the-great-articles/236361)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 29, 2013, 1:35pm UTC](https://www.ruby-forum.com/t/the-great-articles/236361 "2013-08-29T13:35:50Z")
HI, I am going to post a website here the great articles great site special for all peoples who are interest in the great articles great service check them out they are great site . So peoples can get help from this … --- ## [Gr-bluetooth-0.4 make error](https://www.ruby-forum.com/t/gr-bluetooth-0-4-make-error/235375)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 1:05pm UTC](https://www.ruby-forum.com/t/gr-bluetooth-0-4-make-error/235375 "2013-08-29T13:05:43Z")
hi I am trying to install gr-bluetooth-0.4. I got gr-bluetooth from http://gr-bluetooth.sourceforge.net/ , downloaded the latest version, ./configure sudo make During installation i get the following make error. … --- ## [Strange minitest error when using files in test](https://www.ruby-forum.com/t/strange-minitest-error-when-using-files-in-test/236349)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 7\ **Last updated:** [August 29, 2013, 12:17pm UTC](https://www.ruby-forum.com/t/strange-minitest-error-when-using-files-in-test/236349 "2013-08-29T12:17:09Z")
This is quite systematic when a test use files. For instance, I have a minitest/spec test with Utils.compare\_file(file\_1, file\_2).must\_equal true When the comparison gives true, no problem. When the comparison gives … --- ## [MAC physical interface GNU Radio](https://www.ruby-forum.com/t/mac-physical-interface-gnu-radio/154902)
**Author:** [@Radha\_Krishna\_Ganti](https://www.ruby-forum.com/u/Radha_Krishna_Ganti)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 11:39am UTC](https://www.ruby-forum.com/t/mac-physical-interface-gnu-radio/154902 "2013-08-29T11:39:25Z")
Hello all, I am kind of new to gnu radio. I want to implement a CSMA/CA type MAC protocols on the radio. I have some basic questions regarding the implementation. How easy is to implement a packet based CSMA/C… --- ## [Ruby connect oracle problem](https://www.ruby-forum.com/t/ruby-connect-oracle-problem/236360)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 29, 2013, 11:32am UTC](https://www.ruby-forum.com/t/ruby-connect-oracle-problem/236360 "2013-08-29T11:32:15Z")
Hello folks. I’m new in Ruby also ROR. I installed oracle intant client and test it it works fine. Now I wanna connect to oracle db. But its got some error. like this custom\_require.rb:36:in \`require’: cannot load su… --- ## [Graph - finding all paths between nodes](https://www.ruby-forum.com/t/graph-finding-all-paths-between-nodes/246081)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [August 29, 2013, 9:53am UTC](https://www.ruby-forum.com/t/graph-finding-all-paths-between-nodes/246081 "2013-08-29T09:53:26Z")
Hi, I have implementation graph as a dictionary. I done finding a path between two nodes, but I don’t know how find all paths between two nodes. Anybody help or give me an advice? My code: class Graph attr\_accessor … --- ## [Require': cannot load such file -- em/simple\_telnet](https://www.ruby-forum.com/t/require-cannot-load-such-file-em-simple-telnet/236358)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 7:40am UTC](https://www.ruby-forum.com/t/require-cannot-load-such-file-em-simple-telnet/236358 "2013-08-29T07:40:50Z")
thufir@dur:~/ruby$ thufir@dur:~/ruby$ ruby tel.rb /home/thufir/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/site\_ruby/2.0.0/ rubygems/core\_ext/kernel\_require.rb:51:in require': cannot load such file -- em/simple\_telnet (LoadE… --- ## [Rdoc zerodivide error](https://www.ruby-forum.com/t/rdoc-zerodivide-error/236339)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [August 29, 2013, 5:54am UTC](https://www.ruby-forum.com/t/rdoc-zerodivide-error/236339 "2013-08-29T05:54:30Z")
When I try to use rdoc I’m getting a zerodivide error. Rdoc claims that the problem is that it isn’t a real ruby compiler, but the ruby compiler doesn’t complain at all. And rdoc doesn’t tell me WHERE in the program … --- ## [Question for Rghost](https://www.ruby-forum.com/t/question-for-rghost/236348)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 5:39am UTC](https://www.ruby-forum.com/t/question-for-rghost/236348 "2013-08-29T05:39:44Z")
I am trying to create a pdf file using Rghost. It’s creating with extention of “pdf.rgin”,what would be the solution to get the pdf? --- ## [Add country region in logs](https://www.ruby-forum.com/t/add-country-region-in-logs/236354)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [August 29, 2013, 2:30am UTC](https://www.ruby-forum.com/t/add-country-region-in-logs/236354 "2013-08-29T02:30:04Z")
Hello nginx! Iam trying to identify all my visitors based on their continent region, i want to log this info in each log entry. There is no geoip database for continent region so I want to map manually the countries w… --- ## [Tools.rb:328:in \`require': cannot load such file -- JSON (LoadError)](https://www.ruby-forum.com/t/tools-rbin-require-cannot-load-such-file-json-loaderror/236343)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 29, 2013, 2:21am UTC](https://www.ruby-forum.com/t/tools-rbin-require-cannot-load-such-file-json-loaderror/236343 "2013-08-29T02:21:49Z")
Hi there, I am trying to get dashing to work well. Please let me know what system details will be helpful to post. Let me show the failure this time :slight\_smile: :~/sweet\_dashboard\_project# bundle Using backpor… --- ## [\[JOBS\] Ruby on Rails Super Hero (Boston Area) - FTE or Contractor!](https://www.ruby-forum.com/t/jobs-ruby-on-rails-super-hero-boston-area-fte-or-contractor/236356)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 29, 2013, 12:57am UTC](https://www.ruby-forum.com/t/jobs-ruby-on-rails-super-hero-boston-area-fte-or-contractor/236356 "2013-08-29T00:57:38Z")
Hi Everyone! To put it bluntly, I’m looking for a\* Ruby on Rails Super Hero\*! Senior-level (3+ years) RoR Engineer to join my company’s East Coast office (located in Burlington, MA). We’re willing to relocate for eit… [Previous page](https://www.ruby-forum.com/latest.md?page=550) [Next page](https://www.ruby-forum.com/latest.md?page=552)