# Latest **URL:** https://www.ruby-forum.com/latest.md?page=504 [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:** 505 --- ## [A, b, c, d = .map{|x| x + o}](https://www.ruby-forum.com/t/a-b-c-d-map-x-x-o/237340)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [November 7, 2013, 3:52pm UTC](https://www.ruby-forum.com/t/a-b-c-d-map-x-x-o/237340 "2013-11-07T15:52:19Z")
I am doing some calculations, which often includes adding some offset to a few values, i.e. moving a line segment (x1, y1, x2, y2). Storing the values in an array makes not really sense, I don’t want to write coord\[0\]… --- ## [Watir question regarding to Browser](https://www.ruby-forum.com/t/watir-question-regarding-to-browser/237325)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 9\ **Last updated:** [November 7, 2013, 3:40pm UTC](https://www.ruby-forum.com/t/watir-question-regarding-to-browser/237325 "2013-11-07T15:40:18Z")
hi I want to gain the control of last opened browser.How would I do that? For an example b=browser.windows.last this is returning the window object but I want IE object thereby I could able to access function inside… --- ## [Volatile variables in loops?](https://www.ruby-forum.com/t/volatile-variables-in-loops/237318)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 8\ **Last updated:** [November 7, 2013, 3:10pm UTC](https://www.ruby-forum.com/t/volatile-variables-in-loops/237318 "2013-11-07T15:10:14Z")
irb(main):009:0\* 5.times{|i; j| if i == 0 then j = 1 end; print i, j, “\\n”} 01 1 2 3 4 =\> 5 I read about the behaviour of blocks and variables in “The Ruby Programming Language” but can not really remember this … --- ## [Heroku rake db:drop error PG::Error: FATAL: permission denied for database "postgres"](https://www.ruby-forum.com/t/heroku-rake-db-drop-error-pg-fatal-permission-denied-for-database-postgres/223484)
**Author:** [@aris](https://www.ruby-forum.com/u/aris)\ **Replies:** 2\ **Last updated:** [November 7, 2013, 3:03pm UTC](https://www.ruby-forum.com/t/heroku-rake-db-drop-error-pg-fatal-permission-denied-for-database-postgres/223484 "2013-11-07T15:03:30Z")
How to empty DB in herokuhttp://stackoverflow.com/questions/4820549/how-to-empty-db-in-heroku I have a Postgres database on Heroku. It is one of the free beta ones. Locally, when testing, I often run rake db:drop && r… --- ## [Forecast and set history function for haar decomposition](https://www.ruby-forum.com/t/forecast-and-set-history-function-for-haar-decomposition/237071)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 8\ **Last updated:** [November 7, 2013, 2:52pm UTC](https://www.ruby-forum.com/t/forecast-and-set-history-function-for-haar-decomposition/237071 "2013-11-07T14:52:07Z")
I am creating a new gnu radio block for decomposing the signal using haar wavelet decompostion and includes the option of number of levels of decompostion. In order to write the code, how should i set the set\_history… --- ## [Rubygems Problem on ubuntu 10.04](https://www.ruby-forum.com/t/rubygems-problem-on-ubuntu-10-04/213349)
**Author:** [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Replies:** 35\ **Last updated:** [November 7, 2013, 2:02pm UTC](https://www.ruby-forum.com/t/rubygems-problem-on-ubuntu-10-04/213349 "2013-11-07T14:02:23Z")
hello… i have problem with rubygems version 1.8.7 on ubuntu 10.04 server LTS 64bit.this rubygems i also try both installation automatic using apt-get package manager and using manually installation but the problem als… --- ## [Is there any way to get this result?](https://www.ruby-forum.com/t/is-there-any-way-to-get-this-result/237333)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 6\ **Last updated:** [November 7, 2013, 12:48pm UTC](https://www.ruby-forum.com/t/is-there-any-way-to-get-this-result/237333 "2013-11-07T12:48:48Z")
I did a test in a job interview and one of the questions was something like make an algorithm that prints the sum of the first 4 million even numbers of fibonacci sequence. in the test I wrote pseudo code, but now I… --- ## [Libusb error with gnuradio v3.4.2git](https://www.ruby-forum.com/t/libusb-error-with-gnuradio-v3-4-2git/237345)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [November 7, 2013, 12:20pm UTC](https://www.ruby-forum.com/t/libusb-error-with-gnuradio-v3-4-2git/237345 "2013-11-07T12:20:46Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [499s and repeated requests](https://www.ruby-forum.com/t/499s-and-repeated-requests/237342)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [November 7, 2013, 11:27am UTC](https://www.ruby-forum.com/t/499s-and-repeated-requests/237342 "2013-11-07T11:27:37Z")
So, I’m running a rather standard nginx → unicorn → rails application, all over HTTPS. Recently, I started looking into some strange load bursts (which have been going on for a while but are getting more important), … --- ## [Minitest-focus 1.1.0 Released](https://www.ruby-forum.com/t/minitest-focus-1-1-0-released/237346)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [November 7, 2013, 11:21am UTC](https://www.ruby-forum.com/t/minitest-focus-1-1-0-released/237346 "2013-11-07T11:21:11Z")
minitest-focus version 1.1.0 has been released! home: https://github.com/seattlerb/minitest-focus rdoc: http://docs.seattlerb.org/minitest-focus Allows you to focus on a few tests with ease without having to use co… --- ## [Strange behaviour in GRC for a simple FFT/IFFT flow-graph](https://www.ruby-forum.com/t/strange-behaviour-in-grc-for-a-simple-fft-ifft-flow-graph/237344)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [November 7, 2013, 10:21am UTC](https://www.ruby-forum.com/t/strange-behaviour-in-grc-for-a-simple-fft-ifft-flow-graph/237344 "2013-11-07T10:21:01Z")
Hi all! When constructing a simple flow graph Signal\_source(f)-\>Throttle(f)-\>Stream\_to\_vector(vf)-\>Forward\_FFT(vc)-\>Reverse\_FFT(vc)-\>Vector\_to\_stream(c)-\>WX\_GUI\_FFT\_sink(c), the sink exhibits strange behaviour, showin… --- ## [The GSoC project on LDPC codes](https://www.ruby-forum.com/t/the-gsoc-project-on-ldpc-codes/236848)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [November 7, 2013, 8:24am UTC](https://www.ruby-forum.com/t/the-gsoc-project-on-ldpc-codes/236848 "2013-11-07T08:24:46Z")
Hello Everyone, I’m Manu, one of the GSoC student under GNU Radio this year. I worked on LDPC Codes, mentored by Jens. Another GSoC student Tracie also worked on LDPC Codes this summer. We both worked such that there … --- ## [Build DVB-T2 system](https://www.ruby-forum.com/t/build-dvb-t2-system/237335)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [November 7, 2013, 3:29am UTC](https://www.ruby-forum.com/t/build-dvb-t2-system/237335 "2013-11-07T03:29:49Z")
Hi I have a project about digital tv , my task now is to build the system of DVB-T2 using gnuradio. but I have two problems : how to read the video and convert it to binary ( the code I should to use in c )2. the… --- ## [Best rail server](https://www.ruby-forum.com/t/best-rail-server/237303)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 11\ **Last updated:** [November 7, 2013, 1:08am UTC](https://www.ruby-forum.com/t/best-rail-server/237303 "2013-11-07T01:08:57Z")
Hi, i want to deploy my website sort of chat website. I am expecting more than 50K online users at it’s peak time. I don’t want to compromise on optimization and page speed and don’t want user to wait too long for pag… --- ## [Gr-fosphor : New RTSA-like visualization block for GNURadio using GPU acceleration](https://www.ruby-forum.com/t/gr-fosphor-new-rtsa-like-visualization-block-for-gnuradio-using-gpu-acceleration/237155)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 27\ **Last updated:** [November 7, 2013, 1:08am UTC](https://www.ruby-forum.com/t/gr-fosphor-new-rtsa-like-visualization-block-for-gnuradio-using-gpu-acceleration/237155 "2013-11-07T01:08:57Z")
Hi, As some of you know, beginning of this month I presented a new GNURadio block I wrote that implements a RTSA like spectrum visualization of the spectrum similar to those found on R&S / Agilent / Tek equipement. I… --- ## [Phase Noise in XCVR2450](https://www.ruby-forum.com/t/phase-noise-in-xcvr2450/237339)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [November 7, 2013, 12:22am UTC](https://www.ruby-forum.com/t/phase-noise-in-xcvr2450/237339 "2013-11-07T00:22:50Z")
Hi, If I use the MIMO cable to synchronize two USRPs with XCVR2450s, I believe that they should become frequency and phase-locked. Does this mean that there should be no phase noise at all? David --- ## [Ngx\_openresty mainline version 1.4.3.3 released](https://www.ruby-forum.com/t/ngx-openresty-mainline-version-1-4-3-3-released/237341)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [November 7, 2013, 12:15am UTC](https://www.ruby-forum.com/t/ngx-openresty-mainline-version-1-4-3-3-released/237341 "2013-11-07T00:15:48Z")
Hello guys! I am happy to announce that the new mainline version of ngx\_openresty, 1.4.3.3, is now released: http://openresty.org/#Download Special thanks go to all the contributors for making this happen! Below is … --- ## [GRC | Block to Variable](https://www.ruby-forum.com/t/grc-block-to-variable/237336)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [November 6, 2013, 11:30pm UTC](https://www.ruby-forum.com/t/grc-block-to-variable/237336 "2013-11-06T23:30:48Z")
Hello! In GRC, is it possible to store the latest output of a block into a variable? Let’s say I have a block “A” that is outputting floats. I want to save the latest output of block “A” into a variable “var” such th… --- ## [Is it possible with Rails to interact with SVN Server and/or the server's shell?](https://www.ruby-forum.com/t/is-it-possible-with-rails-to-interact-with-svn-server-and-or-the-servers-shell/237327)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 5\ **Last updated:** [November 6, 2013, 10:40pm UTC](https://www.ruby-forum.com/t/is-it-possible-with-rails-to-interact-with-svn-server-and-or-the-servers-shell/237327 "2013-11-06T22:40:04Z")
Hello! I’m fairly new to Ruby and Rails, and currently I don’t have any knowledge on interacting with the server’s shell or a SVN server, but now I have to develop an app where admins allow/restrict access to files an… --- ## [\[coproc\] Domain concept for blocks and ports](https://www.ruby-forum.com/t/coproc-domain-concept-for-blocks-and-ports/237005)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 8\ **Last updated:** [November 6, 2013, 10:29pm UTC](https://www.ruby-forum.com/t/coproc-domain-concept-for-blocks-and-ports/237005 "2013-11-06T22:29:29Z")
Hi, This is an evolution of a concept that was mentioned at GRcon which I really liked and I thought a bit more about it. The general idea is that each block and each port within blocks would have a “domain” associat… --- ## [How do the Japanese( or any other non-English) use Ruby language?](https://www.ruby-forum.com/t/how-do-the-japanese-or-any-other-non-english-use-ruby-language/237334)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [November 6, 2013, 10:06pm UTC](https://www.ruby-forum.com/t/how-do-the-japanese-or-any-other-non-english-use-ruby-language/237334 "2013-11-06T22:06:06Z")
Can somebody explain how the Japanese use Ruby language? Do they have built-in function names and class names in Japanese, or are they compelled to English characters and names as I/we am/are used to? I am wondering … --- ## [Passare parametri da una vista ad un controller](https://www.ruby-forum.com/t/passare-parametri-da-una-vista-ad-un-controller/237324)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 9\ **Last updated:** [November 6, 2013, 10:02pm UTC](https://www.ruby-forum.com/t/passare-parametri-da-una-vista-ad-un-controller/237324 "2013-11-06T22:02:36Z")
Ciao, abuso del vs aiuto per un problema banale, ma che non riesco a risolvere da ieri sera. Ho un link che richiama la new di un controller come segue: \<%= link\_to ‘Feedback’, new\_feed\_path(:shop\_id =\> @shop.id) %\> … --- ## [Generic LP/BP filters](https://www.ruby-forum.com/t/generic-lp-bp-filters/237271)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [November 6, 2013, 9:55pm UTC](https://www.ruby-forum.com/t/generic-lp-bp-filters/237271 "2013-11-06T21:55:00Z")
For the “generic” LP/BP filter blocks, would it make sense for them to automatically select either a conventional FIR or FFT-fast-convolution filter, depending on the number of taps and other parameters? The user sti… --- ## [Voice QAM Mod/Demod](https://www.ruby-forum.com/t/voice-qam-mod-demod/237337)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [November 6, 2013, 9:07pm UTC](https://www.ruby-forum.com/t/voice-qam-mod-demod/237337 "2013-11-06T21:07:41Z")
Hi everyone, I´m trying to send and receive real-time voice with USRP E110 and GNU Radio as software, I’ve already seen some tutorials and think I’m following instructions correctly, but I still receive intermittent … --- ## [Rails 2D array access in Helper method](https://www.ruby-forum.com/t/rails-2d-array-access-in-helper-method/237256)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 6\ **Last updated:** [November 6, 2013, 7:08pm UTC](https://www.ruby-forum.com/t/rails-2d-array-access-in-helper-method/237256 "2013-11-06T19:08:58Z")
Hi, I Want to simply print out 2d array elements. Method is located in Helper module. Calling helper method from jQuery. At the moment I’m not getting output (=\> 0…3) I tried to do iterate through array via .each() me… --- ## [Resolution of USRP N210 and N200](https://www.ruby-forum.com/t/resolution-of-usrp-n210-and-n200/237273)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [November 6, 2013, 6:23pm UTC](https://www.ruby-forum.com/t/resolution-of-usrp-n210-and-n200/237273 "2013-11-06T18:23:29Z")
Hi, Both of USRP N210 and N200 have 14 bit ADC, which means a range of +/-2e13=+/-8129. However, as I tested a N210 with LFRX, I got values from -32704 ~ 30073, close to +/-2e15=32768. Last year, I also tested a N20… --- ## [Re: BPSK receiver issue / message passing](https://www.ruby-forum.com/t/re-bpsk-receiver-issue-message-passing/237338)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [November 6, 2013, 6:21pm UTC](https://www.ruby-forum.com/t/re-bpsk-receiver-issue-message-passing/237338 "2013-11-06T18:21:09Z")
Thanks for the reply. It seems to be an endian issue such that I can’t simply shift bits but must use a proper framer. I have modified an existing AX.25 block such that I can now see my frames over the air using debug… --- ## [Gr-airmodes with gnuradio. gr-osmosdr and bladerf](https://www.ruby-forum.com/t/gr-airmodes-with-gnuradio-gr-osmosdr-and-bladerf/237312)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 6\ **Last updated:** [November 6, 2013, 4:14pm UTC](https://www.ruby-forum.com/t/gr-airmodes-with-gnuradio-gr-osmosdr-and-bladerf/237312 "2013-11-06T16:14:56Z")
Hi, gr-airmodes, gr-osmosdr, gnuradio and bladerf all with latest versions, built directly from the repo. modes\_rx works just fine, the messages come through. modes\_gui throws this error, when switching insinde the g… --- ## [Ruby Developers Looking to work in England](https://www.ruby-forum.com/t/ruby-developers-looking-to-work-in-england/237332)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [November 6, 2013, 4:05pm UTC](https://www.ruby-forum.com/t/ruby-developers-looking-to-work-in-england/237332 "2013-11-06T16:05:03Z")
Hello Ruby Italy, I am looking for Ruby Developers with experience from Italy to work in England. You would be working with an Italian Team. Please contact via removed\_email\_address@domain.invalid Kind Regards --- ## [My first Ruby on Rails application](https://www.ruby-forum.com/t/my-first-ruby-on-rails-application/237328)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [November 6, 2013, 3:15pm UTC](https://www.ruby-forum.com/t/my-first-ruby-on-rails-application/237328 "2013-11-06T15:15:52Z")
Hello everybody, I just joined the group and I wanted to share my first Ruby on Rails application I’m developing the last 5 months. http://actibities-uniongr.rhcloud.com/pages/view-demo The application is currently de… [Previous page](https://www.ruby-forum.com/latest.md?page=503) [Next page](https://www.ruby-forum.com/latest.md?page=505)