rspec - Circular require issue with Ruby -


i trying implement currency based application using ruby, find that:

  require 'dollar'   require 'franc'   puts 'why not work?'   class money     attr_reader :amount     def self.dollar(number)      dollar.new number    end     def ==(other)      self.amount == other.amount    end      def self.franc(number)      franc.new(number)    end  end

i have franc class looks this:

require 'money'  class franc < money    attr_reader :amount    def initialize(amount)     @amount = number   end    def times(mul)     amount = @amount * mul     franc.new(amount)   end    def ==(other)     return false unless other.is_a? self.class     super   end  end

this direct translation of of code kent beck book ruby. when run bin/rspec see:

/home/vamsi/do/wycash/lib/franc.rb:3:in `<top (required)>': uninitialized constant money (nameerror)     /home/vamsi/do/wycash/lib/money.rb:2:in `require'     /home/vamsi/do/wycash/lib/money.rb:2:in `<top (required)>'     /home/vamsi/do/wycash/lib/dollar.rb:1:in `require'     /home/vamsi/do/wycash/lib/dollar.rb:1:in `<top (required)>'     /home/vamsi/do/wycash/spec/dollar_spec.rb:1:in `require'     /home/vamsi/do/wycash/spec/dollar_spec.rb:1:in `<top (required)>'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1435:in `load'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1435:in `block in load_spec_files'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1433:in `each'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1433:in `load_spec_files'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:100:in `setup'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:86:in `run'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:71:in `run'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:45:in `invoke'     /home/vamsi/do/wycash/.bundle/ruby/2.3.0/gems/rspec-core-3.5.4/exe/rspec:4:in `<top (required)>'     bin/rspec:17:in `load'     bin/rspec:17:in `<main>'

you should put require 'franc' after defined money in first script.

the class money defined when ruby executes second_script.

edit: circular require isn't issue :

# a.rb puts "a" require_relative 'b'  # b.rb puts "b" require_relative 'a'  # ruby a.rb b

replacing require_relative load './b.rb' result in infinite loop , "stack level deep" error.

still, should define money in money.rb, franc in franc.rb, ... , not put franc in money.


Comments

Post a Comment

Popular posts from this blog

php - How to add and update images or image url in Volusion using Volusion API -

actually have store importing products store product data insert , update image or image url not insert , update. this xml code name datapro.txt. <products_joined> <productcode>3710_012t</productcode> <vendor_partno>eah5450silent/di/1gd3(lp)</vendor_partno> <productname>test product ta</productname> <hideproduct>n</hideproduct> <stockstatus>20</stockstatus> <lastmodified>1/5/2016 10:25:00 am</lastmodified> <lastmodby>2</lastmodby> <productweight>0.9</productweight> <productprice>100</productprice> <productmanufacturer>asus tek</productmanufacturer> <vendor_price>32.69</vendor_price> <numproductssharingstock>0</numproductssharingstock> <categoryids>107</categoryids> <producturl>http://tebkq.mvlce.servertrust.com/productdetails.asp?productcode=3710_012t</producturl...
Read more

Laravel mail error `Swift_TransportException in StreamBuffer.php line 269: Connection could not be established with host smtp.gmail.com [ #0]` -

i developing website contact-us page guest users can send me email using gmail . anytime try send mail using contact-us form, error swift_transportexception in streambuffer.php line 269: connection not established host smtp.gmail.com [ #0] this mail.php return [ 'driver' => env('mail_driver', 'smtp'), 'host' => env('mail_host', 'smtp.gmail.com'), 'port' => 587, 'from' => ['address' => '', 'name' => ''], 'encryption' => env('mail_encryption', 'tls'), 'username' => env('mail_username'), 'password' => env(mail_password), 'sendmail' => '/usr/sbin/sendmail -bs', 'pretend' => env('mail_pretend', false), ]; this .env mail_driver=smtp mail_host=smtp.gmail.com mail_port=587 mail_username=afecjaped@gmail.com mail_password=********...
Read more

c# SetCompatibleTextRenderingDefault must be called before the first -

i tried search exception couldn't find solution on case i'am using code below invoke .net application : assembly assem = assembly.load(data); methodinfo method = assem.entrypoint; var o = activator.createinstance(method.declaringtype); method.invoke(o, null); the application invoked has form , in entrypoint of application : [stathread] static void main() { application.enablevisualstyles(); application.setcompatibletextrenderingdefault(false); //exception application.run(new form1()); } setcompatibletextrenderingdefault must called before first iwin32window object created in application. edit : assembly = assembly.load(data); methodinfo method = a.gettype().getmethod("start"); var o = activator.createinstance(method.declaringtype); method.invoke(o, null); you should create new method skips initialization...
Read more