Hi All, I'm a newcomer trying to get my feet wet with Ruby and Sinatra. I followed the Slicehost articles in getting Ruby 1.9.1 setup along with Thin 1.2.7 with a reverse proxy to Nginx. Most things were going pretty smooth until I tried to start up my thin server. This is the output I get from my logs: $ sudo thin -C config.yml -R c...
Possible Duplicate: Should I start with Ruby or Ruby On Rails? I've read several other questions about material in order to learn RoR. But my question is can I start learning RoR without Ruby? It's clear that the other way around is better, but I would rather try this way if it makes sense (somehow). Or learn both in parallel...
I have a URL to a image which i want to save. I looked into ruby file handling and did not come across anything. Please guide me towards some links or blogs which talk about the same. I need to then use Paperclip to produce a thumbnail of this image to be used in my application. ...
Using Ruby 1.8.6, stubbing a finder method to return an Array does not work when the code under test calls the 'count' method on the result: User.any_instance.stubs(:friends).returns([user1, user2]) That's because Array.count has only been added in Ruby 1.8.7. Rails also adds a count method dynamically, I believe through the ActiveRec...
Ruby 1.8.6 I have an array containing numerical values. I want to reduce it such that sequences of the same value are reduced to a single instance of that value. So I want a = [1, 1, 1, 2, 2, 3, 3, 3, 3, 2, 2, 2, 3, 3, 3] to reduce to [1, 2, 3, 2, 3] As you can see, Array#uniq won't work in this case. I have the following, whic...
I am programming in Ruby and have wanted to learn about matrices but I can't find any resources for actually learning about them. Are there any good tutorials on matrices and programming? It would be nice if it would be in ruby but other languages are fine too. ...
8, 10, 12, 981 (few area codes in Sweden). Total phone number can be 10 or 11 (digits only) If 8 + 9 or 10 digits if 981 + 7 or 8 digits Can this be done in regex? something like that ..hm (8|10|12)\d{n} => Total Length 10 or 11 ...
If I wanted to do something like this: collection.each do |i| return nil if i == 3 ..many lines of code here.. end How would I get that effect? I know I could just wrap everything inside the block in a big if statement, but I'd like to avoid the nesting if possible. Break would not work here, because I do not want to stop iter...
So I know in ruby that x.nil? will test if x is null. What is the simplest way to test if x equals ' ', or ' '(two spaces), or ' '(three spaces), etc? Basically, I'm wondering what the best way to test if a variable is all whitespace? ...
I need to convert a Date object into a TimeWithZone object representing the beginning of that day in a given time zone. The following approach works, but seems too convoluted as it requires me to convert the date to a string: ?> date = Date.parse("2010-02-17") => Wed, 17 Feb 2010 >> ActiveSupport::TimeZone['Eastern Time (US & Canada)']...
I'm trying to get a common element from a group of arrays in Ruby. Normally, you can use the & operator to compare two arrays, which returns elements that are present or common in both arrays. This is all good, except when you're trying to get common elements from more than two arrays. However, I want to get common elements from an unkn...
The class class A private def foo puts :foo end public def bar puts :bar end private def zim puts :zim end protected def dib puts :dib end end instance of A a = A.new test a.foo rescue puts :fail a.bar rescue puts :fail a.zim rescue puts :fail a.dib rescue puts :fail a.gaz rescue puts :f...
Hi folks, this week I'm having problems logging in LinkedIn using ruby mechanize. My code is as follows: agent = WWW::Mechanize.new home_page = agent.get('http://www.linkedin.com') sign_in_link = home_page.links.find{|link| link.text == "Sign In"} login_form = sign_in_link.click.form('login') # with email and password variables properl...
I've inherited a little rails app and I need to extend it slightly. It's actually quite simple, but I want to make sure I'm doing it the right way... If I visit myapp:3000/api/persons it gives me a full list of people in XML format. I want to pass param in the URL so that I can return users that match the login or the email e.g. yapp:30...
I am making a super small Sinatra blog application, how could I take entries from a database, format them, and insert them into my layout? ...
Hi everyone, I'm trying to get started with twitter4r but I'm having some issues: Why I can't load the gem in IRB? $ sudo gem install twitter4r Successfully installed twitter4r-0.3.2 1 gem installed Installing ri documentation for twitter4r-0.3.2... Installing RDoc documentation for twitter4r-0.3.2... $ irb >> require 'rubygems' => f...
I'd like to be able to read an XML file uploaded by the user (less than 100kb), but not have to first save that file to the database. I don't need that file past the current action (its contents get parsed and added to the database; however, parsing the file is not the problem). Since local files can be read with: File.read("export.op...
I need some advice, what is the rule of the thumb when creating Rails controllers names? Should controller be all be verbs or a combination of nouns and verbs (or adjectives)? This is the example provided on creating controllers in Rails, ./script/generate controller CreditCard open debit credit close # which is a combination of nouns...
I got problem "Processing environment.rb: Pre Initialisation Phase (using rails 2.3.5)" "Processing environment.rb: Main Initialisation Phase" C:/Ruby/bin/rake: No such file or directory - svnversion [memcache-client] Could not load SystemTimer gem, falling back to Ruby's slower/unsafe timeout library: no such file to load -- system_tim...
I'm working on a problem where I need to store serialized hierarchies of Ruby objects in the database. Many of the objects that will need to be saved are ActiveRecord objects with a lot of attributes. Instead of saving the entire objects and then refreshing their attributes from the DB when I load them (in case they changed, which is l...