Using Ruby, how can I take a string and insert pipes between the words?
Let's say I have this string: "birthday cake is my favorite" I need to convert that to: "birthday|cake|is|my|favorite" How would I go about doing that with Ruby? ...
ruby
Ruby script execution within a module
Why is is that the following fails? module Test def test puts "test" end puts "testing" test end I get this output: testing test.rb:6:in `test': wrong number of arguments (ArgumentError) from test.rb:6:in `<module:Test>' from test.rb:1:in `<main>' Is it because the module hasn't been "compiled" yet,...
Practices while releasing the python/ruby/script based web applications on production
I am purely a windows programmer and spend all my time hacking VC++. Recently I have been heading several web based applications and myself built applications with python (/pylons framework) and doing projects on rails. All the web projects are hosted on ubuntu linux. The RELEASE procedures and check list we followed for building and...
Solid tutorial for building a simple wiki application in Ruby on Rails?
I've searched and I've found a lot that are antiquated. Any suggestions? ...
How to read someone else's forum
Hi My friend has a forum, which is full of posts containing information. Sometimes she wants to review the posts in her forum, and come to conclusions. At the moment she reviews posts by clicking through her forum, and generates a not necessarily accurate picture of the data (in her brain) from which she makes conclusions. My thought to...
[Ruby] How to do a newline in output
Hi, as a warning I am completly new to Ruby (been learning for 1 day) so please explain in simple terms. how do I make \n actually work in my output? At the moment it just writes it all in 1 long block. Thanks for any help Dir.chdir 'C:/Users/name/Music' music = Dir['C:/Users/name/Music/*.{mp3, MP3}'] puts 'what would you like to call ...
Parsing JSON without quoted keys
I understand that in JSON, keys are supposed to be surrounded in double quotes. However, I'm using a data source which doesn't quote them, which is causing the Ruby JSON parser to raise an error. Is there any way to perform 'non-strict' parsing? Example: >> JSON.parse('{name:"hello", age:"23"}') JSON::ParserError: 618: unexpected token...
Why is Math.sqrt(i*i).floor == i?
I am wondering if this is true: When I take the square root of a squared integer, like in f = Math.sqrt(123*123) I will get a floating point number very close to 123. Due to floating point representation precision, this could be something like 122.99999999999999999999 or 123.000000000000000000001. Since floor(122.999999999999999999) ...
Ramaze's Haml engine returns same template every time
I've run into a problem with my very simple Ramaze project. My project is identical to the prototype project that is generated from 'ramaze create mywebsite', except that I'm using Haml templates (I set 'engine :Haml' in controller/init.rb). Here are the steps to reproduce the problem: Start the development server. I'm using Thin. V...
How to rescue from a reqiure "gem_name" when the gem is not installed
I'm writing a library that depend on a specific gem. I require the gem and use it in my code and everything is hunky-dory as long as the gem is installed on the user's machine. but what if it is not?! I thought it's fine cause I can rescue from the require command and print a message to the output to inform the user about the lacking ge...
machine readable language for writing notes
I'd like to write notes for class in plain text. I was wondering if there was a markup language for doing this, where I could parse the notes for key terms, titles, page #s etc programmatically with a language such as Ruby or Python. ...
Comparing a variable against two different values in Ruby
This is more a question of semantics than anything else. I'd like to check if a variable is either one of two values. The easiest way of doing this would be: if var == "foo" || var == "bar" # or if var == 3 || var == 5 But this doesn't feel very DRY to me. I know I can use String.match(), but that doesn't work for non-string vari...
Ruby Nokogiri Parsing HTML table II
Hi all I have just installed ruby+mechanize. It seems to me that it is posible in ruby nokogiri what I want to do but I do not know how to do it. What about this table? It is just part of html of vBulletin forum site. I tried to keep the html structure but deleted some text and tag attributes. I want to get some details per thread like...
launch gdb and print out variable value using ruby
Hi , I want to write a ruby program that could inspect the variable value of a program by launch the gdb and then print that value. How could I achieve this? If I were in the shell, I would do this : shell > gdb test [...gbd started] (gdb) p variable $1 = 20 (gdb) I also like to hear other ways that can achieve the same g...
Restful_authentication plugin not working
I'm using restful_authentication plugin for Ruby on Rails. All seems fine except that it seems the user session is not getting created at all. I have the create method below. It appears that the self.current_user is being set but that the actual session is never created. When and how is the current_user_session supposed to be defined...
How to fetch a binary file from a remote embeded system using telnet?
Hi, I have a remote embedded system and it is telnet-able. How can I fetch a binary file from it using ruby? If it were a text file, I could have used: con = Net::Telnet::new("Host"=>ip,"Timeout"=>200) #Host not host File.open("fetched_file","w+") do |f| con.cmd("cat /ect/file") {|data| f.write(data)} end But this wo...
"Parseltongue": get Ruby to Speak a bit of Python ?
Just for interest really - community wiki - how much Python can we get Ruby to understand ? [ Probably be just as interesting to do the reverse as well]. The experiment (such as it is) perhaps to see how much can be written in Ruby-Cross-Python scripts that will result in identical outputs. The only 'cheat' I guess being allowed here is...
No gem called "activerecord-sqlite3-ruby-adapter"
I am trying to set up active records on top of a sqlite3 database with native ruby 1.8. This should work easily enough, I have seen plenty of examples out there that explain how. I am using some example code I have found, its pretty basic and starts with the following lines: require 'rubygems' require 'active_record' #require 'sqlite3-r...
How to calculate the amount of data downloaded and the total data to be downloaded in Ruby
I'm trying to build a desktop client that manages some downloads with Ruby. I would like to know how to go about trying to identify how much of the data is downloaded and the size of the entire data that is to be downloaded. Im trying to do this with Ruby so any help would be useful. Thanks in advance. ...
Add a character each x characters in Ruby
I would like to brake a long word in my Ruby on Rails string (something like <wbr> in HTML). Is it possible to tell Ruby "add character x in string y each z characters"? ...