# Latest **URL:** https://www.ruby-forum.com/latest.md?page=556 [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:** 557 --- ## [Gen 2 Reader](https://www.ruby-forum.com/t/gen-2-reader/246037)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [August 21, 2013, 5:14pm UTC](https://www.ruby-forum.com/t/gen-2-reader/246037 "2013-08-21T17:14:28Z")
Hello everybody, I’ve been trying to set up the RFID-Reader by Michael Buettner and David Wetherall as described in the paper “A Flexible Radio Software Transceiver for UHF RFID Experimentation”. Following the instruc… --- ## [Installing mysql-ruby-2.8.2 adaptor](https://www.ruby-forum.com/t/installing-mysql-ruby-2-8-2-adaptor/246068)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [August 21, 2013, 5:08pm UTC](https://www.ruby-forum.com/t/installing-mysql-ruby-2-8-2-adaptor/246068 "2013-08-21T17:08:22Z")
$ ruby ./test.rb – \[localhost \[‘user’@‘localhost’ \[password \[databasename \[3306 \[socket \[flag\]\]\]\]\]\]\]\] OUTPUT - ruby: relocation error: ./mysql.so: symbol mysql\_get\_client\_version, version libmysqlclient\_18 not define… --- ## [Multiple scope routes](https://www.ruby-forum.com/t/multiple-scope-routes/236280)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 21, 2013, 4:01pm UTC](https://www.ruby-forum.com/t/multiple-scope-routes/236280 "2013-08-21T16:01:31Z")
Here’s an interesting question that I’m not sure has an answer. I would like a controller to be accessed by multiple URL’s within Rails. example.com/crm/users/1 example.com/admin/users/1 They should both show the sa… --- ## [What is this error](https://www.ruby-forum.com/t/what-is-this-error/236263)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 2\ **Last updated:** [August 21, 2013, 3:27pm UTC](https://www.ruby-forum.com/t/what-is-this-error/236263 "2013-08-21T15:27:49Z")
Hi all, I am getting this bellow error This is my code(method): def self.generate\_normal\_report(batch\_ids) batches = Batch.find(:all,:conditions =\> {:id =\> batch\_ids},:select =\> “id”) batches.each do |batch| exam… --- ## [How to distinguish if nginx generated a 504 error or upstream returned it?](https://www.ruby-forum.com/t/how-to-distinguish-if-nginx-generated-a-504-error-or-upstream-returned-it/246091)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 21, 2013, 12:44pm UTC](https://www.ruby-forum.com/t/how-to-distinguish-if-nginx-generated-a-504-error-or-upstream-returned-it/246091 "2013-08-21T12:44:16Z")
Hello ! I run nginx as a reverse proxy and send requests to an upstream server, the problem is according to my logs sometimes i start seeing this: \[499\] \[-\] \[0\] \[11602\] \[xx.126.55.81\] \[GET /weblogin/ HTTP/1.1\] or \[5… --- ## [Booting Zynq/Gnuradio](https://www.ruby-forum.com/t/booting-zynq-gnuradio/246043)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 6\ **Last updated:** [August 21, 2013, 12:20pm UTC](https://www.ruby-forum.com/t/booting-zynq-gnuradio/246043 "2013-08-21T12:20:18Z")
Hi everybody, I was thrilled to find Jonathon’s writeup, and I have been trying to get the same setup working here. Some things I learned along the way: OpenEmbedded is very very cool! bitbake doesn’t work on eCryptf… --- ## [Channel estimation/equalization in OFDM](https://www.ruby-forum.com/t/channel-estimation-equalization-in-ofdm/246047)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 21, 2013, 12:00pm UTC](https://www.ruby-forum.com/t/channel-estimation-equalization-in-ofdm/246047 "2013-08-21T12:00:27Z")
Dear All, I’ve been trying to investigate how channel estimation works in OFDM based on the implementation provided in Gnuradio for OFDM transmission. I found that it was done in the block digital\_ofdm\_frame\_acquisi… --- ## [Make fails in gr-how-to-write-a-block](https://www.ruby-forum.com/t/make-fails-in-gr-how-to-write-a-block/160078)
**Author:** [@emil](https://www.ruby-forum.com/u/emil)\ **Replies:** 7\ **Last updated:** [August 21, 2013, 10:31am UTC](https://www.ruby-forum.com/t/make-fails-in-gr-how-to-write-a-block/160078 "2013-08-21T10:31:04Z")
So i want to learn how to write a block but it fails to install apparently. after doing ./bootstrap and then ./configure make gives the following message: libtool: Version mismatch error. This is libtool 2.2.6, but … --- ## [Cannot save object instance to database (Rails 3)](https://www.ruby-forum.com/t/cannot-save-object-instance-to-database-rails-3/246074)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 21, 2013, 9:32am UTC](https://www.ruby-forum.com/t/cannot-save-object-instance-to-database-rails-3/246074 "2013-08-21T09:32:04Z")
Hi all! I’m pretty new to Rails and got stuck a little. I’m trying to create new object instance via “new” form but nothing happens. I just get the same form (refreshed and empty) and all parameter that I had typed … --- ## [Multiple search forms and search engines](https://www.ruby-forum.com/t/multiple-search-forms-and-search-engines/246055)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 21, 2013, 8:19am UTC](https://www.ruby-forum.com/t/multiple-search-forms-and-search-engines/246055 "2013-08-21T08:19:37Z")
Hello. I have a search form with two search engines (sphinx, elasticsearch), I need to add filters by parameters (name, cost, direction, country). Something like this Notion – The all-in-one workspace for your notes, … --- ## [How to extract the class names?](https://www.ruby-forum.com/t/how-to-extract-the-class-names/246067)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 5\ **Last updated:** [August 21, 2013, 7:10am UTC](https://www.ruby-forum.com/t/how-to-extract-the-class-names/246067 "2013-08-21T07:10:30Z")
I have written a code as below : module A module B class B2 class B1Error \< Exception ;end class B2\_inner $a = Module.constants end end end end $a - Module.constants =\> \[:B1Error, :B2\_inner, :B2, :B\] But now … --- ## [Selected element from select\_list](https://www.ruby-forum.com/t/selected-element-from-select-list/246036)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 5\ **Last updated:** [August 21, 2013, 6:40am UTC](https://www.ruby-forum.com/t/selected-element-from-select-list/246036 "2013-08-21T06:40:40Z")
hi, Using Watir,I want to print the selected element from select\_list, how could I do that? --- ## [Big encoding patches landed on master](https://www.ruby-forum.com/t/big-encoding-patches-landed-on-master/246027)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 21, 2013, 6:30am UTC](https://www.ruby-forum.com/t/big-encoding-patches-landed-on-master/246027 "2013-08-21T06:30:23Z")
Today I landed a very large set of commits that port a subset of MRI’s IO+encoding logic. The goal is to get all IO-related encoding/transcoding behavior working, plus logic that depends on IO encoding/transcoding. A… --- ## [How to turn off gzip compression for SSL traffic](https://www.ruby-forum.com/t/how-to-turn-off-gzip-compression-for-ssl-traffic/236240)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 18\ **Last updated:** [August 21, 2013, 12:26am UTC](https://www.ruby-forum.com/t/how-to-turn-off-gzip-compression-for-ssl-traffic/236240 "2013-08-21T00:26:21Z")
Hi, As you know, due the breach attack (http://breachattack.com), HTTP compression is no longer safe (I assume nginx don’t use SSL compression by default?), so we should disable it. Now, We are using config like the… --- ## [Gr\_foo\_sptr (vs) gr\_foo](https://www.ruby-forum.com/t/gr-foo-sptr-vs-gr-foo/246026)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [August 20, 2013, 11:24pm UTC](https://www.ruby-forum.com/t/gr-foo-sptr-vs-gr-foo/246026 "2013-08-20T23:24:59Z")
Hello, I did spent time working on GNU radio C++ API, And I was stuck debugging in some point where I need to get the gr\_foo to retrieve the values of its members whereas I already instantiated gr\_foo\_sptr instead. … --- ## [Uhd\_fft problems (runtime error)](https://www.ruby-forum.com/t/uhd-fft-problems-runtime-error/236277)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 20, 2013, 11:24pm UTC](https://www.ruby-forum.com/t/uhd-fft-problems-runtime-error/236277 "2013-08-20T23:24:24Z")
Hello, I’m new to using GNURadio and the USRP. I’m running Fedora 17 with GNURadio (3.5.3.1) and UHD (3.4.3) installed with yum. I’m trying to run uhd\_fft.py and I get the following error: $ ./uhd\_fft.py linux; GNU … --- ## [“Add 'gem sqlite3'' to your Gemfile”](https://www.ruby-forum.com/t/add-gem-sqlite3-to-your-gemfile/235538)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 11\ **Last updated:** [August 20, 2013, 10:08pm UTC](https://www.ruby-forum.com/t/add-gem-sqlite3-to-your-gemfile/235538 "2013-08-20T22:08:15Z")
Hello World! I’m a complete n00b on Rails with only beginner knowledge of Ruby. I plan on studying Ruby more before I really learn Rails, but I’m waayy too curious for my own good. Anyway, I was following the tutoria… --- ## [Install evenmachine - Windows 7](https://www.ruby-forum.com/t/install-evenmachine-windows-7/246064)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [August 20, 2013, 8:50pm UTC](https://www.ruby-forum.com/t/install-evenmachine-windows-7/246064 "2013-08-20T20:50:09Z")
Hi, I am trying to install evenmachine but get this error. I have OpenSSL. This is Windows 7. What am I missing ? This( Cannot compile Eventmachine under Ruby 2.0.0-p0 on Windows using gcc 4.7.2 (x64) · Issue #406 · e… --- ## [Meaning of Center Frequency in QT GUI Sink / QT Waterfall Sink](https://www.ruby-forum.com/t/meaning-of-center-frequency-in-qt-gui-sink-qt-waterfall-sink/236202)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 20, 2013, 6:11pm UTC](https://www.ruby-forum.com/t/meaning-of-center-frequency-in-qt-gui-sink-qt-waterfall-sink/236202 "2013-08-20T18:11:15Z")
Hi, what is the meaning of the variable “Center Frequency” in the qt\_gui\_sink / qt\_waterfall\_sink ? If I remember well, in pre 3.7 version it served as base of the x - axis legend. Now, if I choose a value \> bandwi… --- ## [Sub-requests to an upstream server](https://www.ruby-forum.com/t/sub-requests-to-an-upstream-server/236275)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 20, 2013, 5:43pm UTC](https://www.ruby-forum.com/t/sub-requests-to-an-upstream-server/236275 "2013-08-20T17:43:47Z")
Hello, I am writing an nginx plugin and I am trying to send sub-requests to an upstream server. I am aware of the ngx\_http\_subrequest function but I didn’t succeed to use it in my case and I am not sure it is what I… --- ## [New Email](https://www.ruby-forum.com/t/new-email/246040)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [August 20, 2013, 4:33pm UTC](https://www.ruby-forum.com/t/new-email/246040 "2013-08-20T16:33:40Z")
I have been contracted by Ettus R. to help maintain UHD and GNU Radio on Mac OS X, and have new contact email for this position: \< removed\_email\_address@domain.invalid \>. I have (re)subscribed to this list using my n… --- ## [SDR front end design](https://www.ruby-forum.com/t/sdr-front-end-design/246028)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [August 20, 2013, 3:45pm UTC](https://www.ruby-forum.com/t/sdr-front-end-design/246028 "2013-08-20T15:45:10Z")
Hello; I am interested in designing a front end amplifier for a SDR. I am interested in the frequency band from 2 MHz to about 60 MHz. Is there anyone interested this in frequency band and is doing hardware desi… --- ## [Initialize parameter of preloaded items](https://www.ruby-forum.com/t/initialize-parameter-of-preloaded-items/236274)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 0\ **Last updated:** [August 20, 2013, 11:32am UTC](https://www.ruby-forum.com/t/initialize-parameter-of-preloaded-items/236274 "2013-08-20T11:32:51Z")
For example: Suppose I wanted the preloaded input to be 5 (instead of default 0), how do I do it? --- ## [Need help to understand the Method#original\_name](https://www.ruby-forum.com/t/need-help-to-understand-the-method-original-name/246080)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 3\ **Last updated:** [August 20, 2013, 9:54am UTC](https://www.ruby-forum.com/t/need-help-to-understand-the-method-original-name/246080 "2013-08-20T09:54:45Z")
The documentation of Method#original\_name(Class: Method (Ruby 2.0.0)) I today read. Accordingly I tried the below example: class Foo def bar;end end foo = Foo.new foo.method(:bar).original\_name ~\> -:5:in \'… --- ## [Another buffer overflow](https://www.ruby-forum.com/t/another-buffer-overflow/246065)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 5\ **Last updated:** [August 20, 2013, 9:43am UTC](https://www.ruby-forum.com/t/another-buffer-overflow/246065 "2013-08-20T09:43:01Z")
Hi guys, i been running a little ruby program lately and this is what happens after a while: -note (did set ulimit -n 20000 and also done more modifications to increase opened files limit) \*\*\* buffer overflow detecte… --- ## [Overrun issue and packet loss](https://www.ruby-forum.com/t/overrun-issue-and-packet-loss/236231)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 4\ **Last updated:** [August 20, 2013, 6:31am UTC](https://www.ruby-forum.com/t/overrun-issue-and-packet-loss/236231 "2013-08-20T06:31:25Z")
I am facing Overrun issue on 500K sampling rate with USRPN210. I see an ‘O’ after irregular time intervals when I use my flowgrpah . PC is directly connected to USRP with Ethernet cable. PC details: Processor: Intel … --- ## [Meet up in Rio de Janeiro, Brazil, or Santiago, Chile](https://www.ruby-forum.com/t/meet-up-in-rio-de-janeiro-brazil-or-santiago-chile/236272)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 20, 2013, 3:04am UTC](https://www.ruby-forum.com/t/meet-up-in-rio-de-janeiro-brazil-or-santiago-chile/236272 "2013-08-20T03:04:39Z")
I’ll be in Rio de Janeiro the week of August 26 and in Santiago the following Mon/Tue, teaching a couple of private GNU Radio classes. Eu gostaria de reunir-se com os usuários de rádio GNU locais para tomar uma cervej… --- ## [How to use gr-audio on Windows?](https://www.ruby-forum.com/t/how-to-use-gr-audio-on-windows/236187)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [August 20, 2013, 2:13am UTC](https://www.ruby-forum.com/t/how-to-use-gr-audio-on-windows/236187 "2013-08-20T02:13:25Z")
Hi Lists, I’ve install gnuradio on Windows following the link: http://voltronics.blogspot.com/2013/01/gnu-radio-windows-build-guide.html. It’s OK.After that, I’ve write program to read data from soundcard with gr-aud… --- ## [GR\_TEST\_TARGET\_DEPS Settings?](https://www.ruby-forum.com/t/gr-test-target-deps-settings/236271)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 1\ **Last updated:** [August 20, 2013, 1:38am UTC](https://www.ruby-forum.com/t/gr-test-target-deps-settings/236271 "2013-08-20T01:38:22Z")
I recently posted a “my bad”, but it lead me to wonder why “make test” was failing. I had commit 64f8434d0 from 02-August-2013 installed, and had built commit 9be83a4d from 16-August-2013 and was executing “make test… --- ## [Hoe 3.7.1 Released](https://www.ruby-forum.com/t/hoe-3-7-1-released/246066)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [August 20, 2013, 12:59am UTC](https://www.ruby-forum.com/t/hoe-3-7-1-released/246066 "2013-08-20T00:59:13Z")
hoe version 3.7.1 has been released! code: https://github.com/seattlerb/hoe home: http://www.zenspider.com/projects/hoe.html rdoc: http://seattlerb.rubyforge.org/hoe/ doco: http://seattlerb.rubyforge.org/hoe/Hoe.pdf … [Previous page](https://www.ruby-forum.com/latest.md?page=555) [Next page](https://www.ruby-forum.com/latest.md?page=557)