There is an execution path in the code below, where “bar” is not set before the test. Is it safe in Ruby? Will “bar” be initialized by default?
if foo
bar = true
end
if bar
puts “true”< br
Category: Ruby
Ruby, a scripting language created for simple and fast object-oriented programming (object-oriented programming), was developed by Japanese Yukihiro Matsumoto in the 1990s and complies with the GPL agreement and Ruby License. Its inspiration and features come from Perl, Smalltalk, Eiffel, Ada, and Lisp languages. The Ruby language itself has also developed Ruby language alternatives to other platforms such as JRuby (Java platform) and IronRuby (.NET platform). The author of Ruby started writing Ruby on February 24, 1993, and it was not officially released to the fj (news group) until December 1995. Because Perl is pronounced the same as the June birthstone pearl, Ruby is named after the July birthstone ruby.
How to create a file in Ruby
I am trying to create a new file, but things don’t seem to work as I expected. Here is what I tried:
File.new “out.txt”
File.open “out.txt”
File.new “out.txt”,”w”
File.open “out .txt”,”
Ruby – What does various parameter prefixes mean when declaring methods?
When declaring a method, what do the various prefixes of the parameters mean?
sh(*cmd, &block) What does the * before cmd mean?
What & what does it mean before the block
def foo(*
Ruby-on-rails – Ruby On Rails Script Console
I could not run ./script/console before because my script console file contains #! /usr/bin/env ruby19, so it used to throw an error. After clicking and trying out, I used #! /usr/bin/env rubyR
Ruby-on-rails – What is best practices for operating form data before saving in Rails 3?
From a rails best practice point of view, what is the best place to manipulate form data before saving?
For instace, on the contact form, I want to make sure that all data is saved in upperca
Query LDAP users better ways through Ruby Net-LDAP?
Is there a better way to search for users and computers that specifically use the Net-ldap gem?
This is what I currently do just to get users.
results = search :base => @base, :filter =
Ruby-on-rails – Use the Rails Society Time Zone in PostgreSQL – the field type to use
I store the time zone in the database I obtained through the FB API. The time zone looks like:
-7 Which field should I use in rails/PostgreSQL to store this value? string?
UTC-3.5
-7
A
Ruby-on-rails-3 – How to name the foreign key in ROR 3?
How to name foreign keys in RoR?
I used the following command to give the foreign key:
rails generate scaffold Table2 id:integer Table1:references this The command adds the foreign key
Ruby-on-rails – Ruby On Rails, forced users to download TMP files
I created a file in the tmp directory, which contains the following controller code:
def download file_path = “#{RAILS_ROOT}/tmp/downloads/xxx.html”
data = render_to_string( :action => :show
Ruby-on-rails – use Cancan to authorize resources based on multi-to-many associations
I have two models, events and users share many-to-many associations. Users can be administrators, managers or producers.
Only the producer belonging to an event can read Take the event. I tried to