I have installed Ruby (not Rails) on a machine and am trying to run some code based off the koala framework for Facebook.
When I run
gem list
koala is mentioned but when I run the file, I get this error. Rubygems is already installed, I'm not sure what else to do. Any ideas?
Edit:
require 'koala'
require 'json'
#graph = Koala::Facebook::API.new("CAACEdEose0cBANb7YuygrBflSkBrpdalb4e70T5lJgdLPYEh0Uxy5JLPVdukKSiwZAK8g27DnwscSUWNaC0s53ogq6h562LETjYO4sB5lZAMAy8tC0SM9UzqXkk7GKYpaLrkQlgj1oLTdOJhBfq5KJtFxZBkOkpz8HaVPLYp66OnuGkaGOogVseR1tUNXVxToKl6ZCmwHL0i5RHNvMnd")
url = File.open("urls.txt","r")
url.each_line do |line|
id = /[\d]+/.match(line)
begin
temp = #graph.get_object(id)
list = File.open("working.txt", "a")
list.write(id)
list.write("\n")
puts "Worked for #{id}."
rescue
puts "Didn't work for #{id}."
end
end
Related
I have a Sinatra application with the following main.rb:
require 'bundler'
Bundler.require
get '/' do
##p = Pry.new
haml :index
end
post '/' do
code = params[:code]
$stdout = StringIO.new
##p.eval(code)
output = $stdout.string
$stdout = STDOUT
output_arr = []
output.each_line('\n') { |line| output_arr << line }
output_arr[1]
binding.pry
end
When I hit the binding.pry at the bottom to see if output contains any output, it seems like the IO stream is not closed, as I can't get anything to show up in the console.
However if I try to call open on StringIO.new, I receive an NoMethodError - private method 'open' called.
I am requiring 'stringio' in a config.ru file, and I've also tried requiring it in the main.rb file:
config.ru:
require 'stringio'
require './main'
run Sinatra::Application
I'm not sure if this is related but something interesting that I've noticed is that, in irb, if I require 'pry' before requiring stringio, then it returns false, otherwise it returns true.
This makes me wonder if Sinatra is including Pry from my Gemfile before loading the config.ru. Could that be the problem? Not sure how to solve this.
I've been playing around with Rails for some time. But now I am attempting to build a ruby gem. And I am using rubymine which builds a gem template for you. In my case it looks like this:
$ ls
bin Gemfile lib Rakefile test
binarytree.gemspec Gemfile.lock LICENSE.txt README.md
merlino#johnmerlino:~/Documents/github/binarytree$
Inside the lib directory, I have a file called binarytree.rb, which contains the following contents:
require "binarytree/version"
module Binarytree
class BinaryNode
attr_accessor :value, :left, :right
def initialize(value=nil)
#value = value
#left = nil
#right = nil
end
def add(value)
if value <= #value
if #left
#left.add value
else
#left = BinaryNode.new value
end
else
if #right
#right.add value
else
#right = BinaryNode.new value
end
end
end
end
class BinaryTree
attr_accessor :root
def initialize
#root = nil
end
def add(value)
if !#root
#root = BinaryNode.new value
else
#root.add value
end
end
def contains(value)
node = #root
while node
if value == node.value
return true
elsif value < node.value
node = node.left
else
node = node.right
end
end
false
end
end
end
What I want to be able to do is run an irb (interactive ruby shell) session, and then be able to require 'binarytree' and have this code inside scope of irb, so I could start playing with it e.g. BinaryTree.new.
Right now I am not sure how to require this in irb:
require 'binarytree'
LoadError: cannot load such file -- binarytree
from /home/merlino/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in require'
from /home/merlino/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:inrequire'
from (irb):1
from /home/merlino/.rvm/rubies/ruby-2.0.0-p0/bin/irb:13:in `'
I am on Ubuntu and I am using rvm to manage gems.
Any ideas?
You have two options:
Go into catalog of your gem and run require './lib/binarytree.rb'
Run rake install inside catalog of your gem - this will build and install this gem into system gems.
I got it working the following way:
1) You first need to edit the gemspec:
binarytree.gemspec
And edit the description and summary lines as so:
spec.description = "binary tree"
spec.summary = "binary tree summary"
Otherwise you will get the following error:
gem build doctor_toons.gemspec
ERROR: While executing gem ... (Gem::InvalidSpecificationException)
"FIXME" or "TODO" is not a description
2) Then run the gemspec as so:
gem build binarytree.gemspec
This should output something that looks like this:
binarytree-0.0.1.gem
3) Now if you are using rvm, make sure you are using the version you want, and run the following:
gem install ./binarytree-0.0.1.gem
The output should look something like this:
Successfully installed binarytree-0.0.1
Parsing documentation for binarytree-0.0.1
Installing ri documentation for binarytree-0.0.1
Done installing documentation for binarytree after 0 seconds
Done installing documentation for binarytree (0 sec).
1 gem installed
4) Then launch irb and require the new gem:
irb(main):001:0> require 'binarytree'
I am unable to create an EXE file from Ruby script.
require 'socket'
class Server
def initialize(ip, port)
#server = TCPServer.open(ip, port)
#clients = Array.new
run
end
def run
loop {
Thread.start(#server.accept) do |client|
#clients << client
client.puts 'Connection established'
listen_user_messages(client)
end
}.join
end
def listen_user_messages(client)
loop {
msg = client.gets.chomp
#clients.each do |other_client|
if other_client != client
other_client.puts "#{msg}"
end
end
}
end
end
Server.new('localhost', 19937)
I'm trying to run the following command:
ocra server.rb
but it freezes on the message
=== Loading script to check dependencies
I've also tried to use exerb:
ruby exerb server.rb
It builds an exe file, but I am unable to use it:
server.rb:1:in `require': No such file to load -- socket (LoadError)
from server.rb:1
require 'socket'
require 'rubygems'
exit if Object.const_defined?(:Ocra) #allow ocra to create an exe without executing the entire script
Add the above to your script, this should allow it to generate.
Ocra cannot see ruby gems and other files at times if you don't include 'rubygems'
I've inherited some Ruby on Rails code and am trying to get it up and running locally. I've seen it work on other people's machines but for me it is throwing an exception. The exception is Savon::UnknownOptionError in DevicesController#index.
What is causing the exception is "Unknown global option: :document=".
Specifically it is failing at row 2 of this call:
wsdl_url = "valid url"
#client = Savon::Client.new do |wsdl|
wsdl.document = wsdl_url
end
it seems the code was written for Savon 1.x The current version is 2.2.0
You could explicitely require the old version with
gem 'savon', '=1.2.0'
wsdl_url = 'http://www.example.com?wsdl'
#client = Savon::Client.new do
wsdl.document = wsdl_url
end
response = #client.request :wsdl, :your_method
print response.to_hash
What I would recommend though is to change the code so it will run with the current version. At http://savonrb.com/version2.html you'll find comprehensive documentation and examples.
I am looking for a way to read and parse locally a remote CSV (hosted on a particular website).
I found on the Internet a couple of interesting examples that make use of FasterCSV, that in ruby 1.9.2 has been merged into CSV. I found that you can read a remote CSV using the gems 'csv' and 'open-uri' this way:
require 'csv'
require 'open-uri'
def read(url)
open(url) do |f|
f.each_line do |l|
CSV.parse(l) do |row|
puts row
end
end
end
end
But when I call this function, I get an exception:
ERROR IOError: closed stream
Anyone can explain me why? Is there anything wrong? Should I choose another approach for reading remote CSV's?
Update
The best solution I've found till now is this:
def read(url)
data = []
begin
open(url) do |f|
data = CSV.parse f
end
rescue IOError => e
# Silently catch the exception ...
end
return data
end
but it somewhat seems not so clean. I really do not like silently catching an exception where it shouldn't be ...
Update 2
I can reproduce the error using both
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]
and
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0]
This is the code from my test.rb file:
require 'rubygems'
require 'open-uri'
require 'csv'
def read(url)
data = []
begin
open(url) do |f|
data = CSV.parse f
end
end
puts data
end
read("http://www.euribor-ebf.eu/assets/modules/rateisblue/processed_files/myav_EURIBOR_2011.csv")
And this is the output of the ruby test.rb command
/Users/marzu/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:152:in `close': closed stream (IOError)
from /Users/marzu/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:152:in `open_uri'
from /Users/marzu/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:671:in `open'
from /Users/marzu/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/open-uri.rb:33:in `open'
from test.rb:8:in `read'
from test.rb:16:in `<main>'
I am using rvm 1.6.9 on Mac OS X 10.6.7.
Any suggestions?
On Mac OS X 10.6.7, using ruby r1.9.2, I get the same error as displayed above. But using the following code to read CSV files works for the example URL provided:
require 'rubygems'
require 'open-uri'
require 'csv'
def read(url)
CSV.new(open(url), :headers => :first_row).each do |line|
puts line
puts line[0]
puts line['FEB11']
end
end
read("http://www.euribor-ebf.eu/assets/modules/rateisblue/processed_files/myav_EURIBOR_2011.csv")