Examples of programming questions in ruby

Base URL of Rails app in Model
Measure the distance between two strings with Ruby?
ruby 2.0 named parameters from a hash
Ruby inject with index and brackets
Iterate nested hash that contains hash and/or Array
Is it possible to get Ruby syntax highlighting in PHPStorm?
Ruby Uninitialized Constant NameError for Class Name
How to remove non-printable/invisible characters in ruby?
How to install RVM system requirements without giving sudo access for RVM user
Connect to a locally built Jekyll Server using mobile devices in the LAN
RestSharp Accept header change
REST API test cucumber steps best practice
When and Why use Loop Do Construct in Ruby
rails console - run a block of code
how to remove active record object from array
How can I do this inside the each_char?
How to include lib directory in rspec tests
Rspec -- need to stub File.open that gets called in another file
Is it possible to instantiate a Ruby class without calling initialize?
how to change hash keys in the lower case using ruby
Selenium > Web Drive : how to find a nested element by xpath (ruby)
ERROR: sql.h not found" when installing ruby-odbc gem on Ubuntu
`binding.pry` for javascript console?
How to get piped input to ruby -e on command line?
What is the difference between @@ and @ in Ruby?
Ruby: eval with string interpolation
Rails fields_for form not showing up, nested form
Rails - how to disable all console logging?
Display time down to milliseconds in Ruby 1.8.7
Rspec mocks error: wrong number of arguments
Specify Vagrantfile path explicity, if not plugin
OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=unknown state: unknown protocol
How to move first element to the end of array
Improve slow Rails startup time (rails console, rails server)
Access model-specific constants in a Rails view
Simple Form Blank Label
How to add styling to a single input in a form_for
Quick way to check if all items in a Ruby array are unique
How do I use Nokogiri to parse an XML file?
Return empty body with Sinatra
What does ["string"].pack('H*') mean?
Ruby: Split, then remove leading/trailing whitespace in place?
Why doesn't "rails s" work from the app directory?
How to use Stripe on non -SSL or http websites?
When do I need to restart server in Rails?
How to squish in ruby
How to check version of Ruby dev kit installed in my Windows?
Poltergeist - turning off JQMIGRATE warnings
strong parameters permit all attributes for nested attributes
Compressing large string in ruby
Confused about "respond_to?" method
factory girl passing arguments to model definition on build/create
Can I use transactional file remove/upload on AWS S3 with aws-sdk-ruby?
Ruby error: cannot load such file -- rest-client
Ruby sort by (integer) "comparison of NilClass with 3200 failed
How do I increment/decrement a character in Ruby for all possible values?
Rails 4 + Devise: Invalid route name, already in use
undefined method `keys' for nil:NilClass for saas hw2
Ruby: "if !object.nil?" or "if object
Select multiple options in a collection_select rails
How do I keep the delimiters when splitting a Ruby string?
rails cannot load such file -- mysql2/mysql2 (LoadError)
Ruby convention for accessing first/last element in array
require: command not found
Ruby/Rails passing array to case
How should I use each_with_object on Hashes?
Parsing JSON in Controller w/ HTTParty
automatically URI decoding as needed
Change default Capybara browser window size
Don't create view folder on rails generate controller
Check to see if record is newly created
Finding the first non-Nil element in an array
Rails 4: How to use includes() with where() to retrieve associated objects
How to run nginx master process with different user
How to download an image file via HTTP into a temp file?
In Ruby, how to output json from hash and give it line breaks and tabs
Can't get rack-cors working in rails application
How to fix a missing template error?
rails s : undefined method `symbolize_keys'
Ruby nested modules as namespaces
What is the # (sharp, number, pound, hash) sign used for in Ruby?
Getting `initialize': wrong number of arguments(1 for 0) (ArgumentError) for simple ruby app
How to add a new action to the existing controller?
Ruby interface classes?
Get Ruby class constant dynamically by name
Using Ruby and Minitest, how do I run the same testcase with different data, controlled only by a list
Returning Multiple Values From Map
Rails 4 Strong Parameters : can I 'exclude' / blacklist attributes instead of permit / whitelist?
Updating timestamps with #update_all
Rails 4 migration: how to reorder columns
activerecord where clause on relation belongs_to
ActiveRecord model without primary key
Encoding::UndefinedConversionError: "\xC2" from ASCII-8BIT to UTF-8
Best way to handle data attributes in Slim
How can I add a method to the global scope in Ruby?
What is the correct way to check for the existence of a nested attribute in Chef?
Why does my rails rollback when I try to user.save?
link_to vs url_for vs path in Rails
How is each_with_object supposed to work?
Disable ActiveRecord for Rails 4
How to create a histogram from a flat Array in Ruby
Library not loaded: /opt/local/lib/libssl.1.0.0.dylib (LoadError)
Heroku - how to write into "tmp" directory?
Ruby-rspec - how to print out the test (group) name
How do I tell Sinatra what environment (development, test, production) it is?
Rails 4: Skip callback
How to use regular expression in fetching data from graphite?
How can I implement this POST request using HTTParty?
How to get current file and line number in Ruby?
Insert records to Heroku database
Filtering on activerecord relation without additional sql query?
Amazon s3 - ruby. Get the URL of the resource that was just uploaded
Sort in ruby a JSON array of hashes
How to write a migration for a rails model that belongs_to itself
How to unzip a zip file containing folders and files in rails, while keeping the directory structure
ERROR: Failed to build gem native extension - Error installing mysql2
Rails force models to eager load
Getting NameError: `format' is not allowed as an instance variable name when testing instance variable with rspec
Create hash from array and frequency
attr_accessor vs attr_reader & instance variables
Ruby string to operator
Migrations are pending; run 'bin/rake db:migrate RAILS_ENV=development' to resolve this issue [unable to proceed]
How to get the current route in rails
Ruby - Find element not in common for two arrays
Ruby: Get all keys in a hash (including sub keys)
Rails generate has_many association
Ruby Count Array objects if object includes value
Ruby string with USD "money" converted to number
bundle gem: rspec says 'No examples found'
How to get a HTML table row with Capybara
Rails: Date.today - 1.day
Shortcut to make case/switch return a value
Ruby on Rails Syntax <% vs <%=
How to check validity of closed brackets, parentheses or brackets in Ruby
How do get a random DateTime rounded to beginning of hour in Rails?
Looking for Example of Faraday Middleware with Error checking
Ruby on Rails - has_one relation, how to check if it has an existing association?
How to get detailed error messages from rails console?
warning: string literal in condition
Authentication headers using Rest Client Ruby Gem
How can I create unique strings (with no numbers) with factory girl?
What's the difference between controllers and actions in ruby on rails?
Generate a nested JSON array in JBuilder
Is "find_all" and "select" the same thing?
No database connection in rails console
Bad value for range
how to get headers from a CSV file in ruby
How to ping for reachability of remote host in Ruby
In Slim templates, HTML comments on separate lines are rendered on the same line
What is the difference between foreman start and foreman run rails server?
ActiveRecord - Get the last n records and delete them in one command?
How can I see the source code of a gem installed on my machine?
Convert a unicode string to characters in Ruby?
Ruby - extracting the unique values per key from an array of hashes
How to add a class to select_tag in Ruby on Rails
Force bundle install to use https:// instead of git:// for GitHub-based gems
Is there any way to make a Ruby temporary file permanent?
Using a hash inside a let()
What is the difference between Integer and Fixnum?
Why does each_slice with block and .map return nil
Ruby on Rails, Using sort on each do
How to group and sum arrays in Ruby?
How do I pass environmental variables to a Rake task invoked from another Rake task?
Ruby on rails: replace camel case with space
Set filter before_action for ActiveAdmin controller
Ruby Regex non-greedy match: looking for the closest occurrence of a phrase left to a searched word
Get an array of the values of a key from an array of hashes?
When to use dump vs. generate vs. to_json and load vs. parse in Ruby's JSON lib?
Unpack a ruby .gem without 'gem unpack' available?
Paperclip::Errors::MissingRequiredValidatorError with Rails 4
How to view a Resque job
Ruby getting the longest word of a sentence
What's the difference between using self.attribute and attribute in a model?
Ruby stubbing with faraday, can't get it to work
How to generate coordinates in between two known points
Why does Ruby use nil to name the null object?
How do I use the Bootstrap form select css with a Rails model?
What does the "mount" instruction mean in Rails routing?
Ruby is_a? vs ===
What are the differences between rbenv, rvm, and chruby?
Ruby on Rails 4 - simple_form multiple select input
Rails 4 - saving images in database
How should I provide YARD/RDoc documentation for Ruby keyword arguments?
SASS compile error - LoadError: cannot load such file -- listen/version Use --trace for backtrace
Generating unique, hard-to-guess "coupon" codes
Capybara won't find a button by its "name" attribute
httparty: how to log request?
Search a JSON Response using Ruby
How to get records created at the current month?
How can I select the longest string from a Ruby array?
Why is sudo: bundle command not found?
rspec receive method not working as expected
Iterate over arrays in liquid templates
Rails Migration changing column to use Postgres arrays
What is the difference between '&&' and '&' in Ruby
Add something to hash value if key exists?
Rspec mocks, can 'expect' also stub a method as a side effect?
routes.rb - Controller name not supported
RVM + Zsh "RVM is not a function, selecting rubies with 'rvm use ...' will not work
rails4 unknown encoding name - CP720
rspec controller test, get with multiple parameters
Rails Controller Namespace
Rails console: in `require': cannot load such file -- readline (LoadError)
How do I call a JavaScript function from an html.erb
form_for - Ruby on Rails
How can I ensure that Ruby uses an OpenSSL not vulnerable to Heartbleed?
how to test ruby inheritance with rspec
Gem error to install
EOFError (end of file reached) in Ruby on Rails with http.request
send PDF with rails send_data
ruby - json no implicit conversion of String into Integer (TypeError)
What is the syntax for `gem install` multiple gems, specifying versions for each one?
Heroku: How to push seeds.rb to existing rails app?
Ruby 'is_a?' class or module required (TypeError)
Could not find devise mapping for path "/sessions/user" devise log in error
Undefined Method attr_accessible
ruby/regex getting the first letter of each word
What is the difference between a Ruby Hash and a Python dictionary?
Invalid date ArgumentError and incorrect parse on a valid date?
How to convert ruby formatted json string to json hash in ruby?
ActiveAdmin ForbiddenAttributesError
Can't install rmagick, pkg-config: command not found
Rspec advice for testing service objects
Rails 4.1 Mailer Previews and Devise custom emails
How to manually send a Devise email?
Brakeman unsafe reflection method constantize called with model attribute
Ruby Array concat versus + speed?
Rails: Could not find minitest-4.7.5 in any of the sources
Ruby on Rails: permission denied when using "rails generate controller welcome
Is there an inline way to conditionally add an attribute in Ruby?
Ruby on Rails: before_save fields to lowercase
How do I test for non-null in Ruby::Sequel?
Rails: Uninstall specific version of a library using gem
unable to connect to chromedriver http://127.0.0.1:9515 (Selenium::WebDriver::Error::WebDriverError)
What are the options to Capybara's have_selector?
Validate so that no special characters are allowed
How to get the sum an array of strings in ruby
No such file or directory @ rb_sysopen" using OpenURI
Concat double quotes with String in Ruby
How to test strong params with Rspec?
Token authentication
undefined method `session_path'
Rails unable to autoload constant from file despite being defined in that file
RSpec any_instance deprecation: how to fix it?
ExecJS::RuntimeUnavailable in Rails 4.1.4
How to merge two hashes that have same keys in ruby
Test for ActiveRecord::RecordNotFound
minitest - pass any argument to expect
How to check in ruby if an string contains any of an array of strings
ruby array, get all elements from second to last