I'm just trying to run a very simple snippet on my RVM Ruby 1.9.2 installation:
require 'rubygems'
require 'active_support'
obj = {"foo" => "bar"}
xml = obj.to_xml
Ruby complains as follows:
NoMethodError: undefined method `to_xml' for {"foo"=>"bar"}:Hash
from (irb):2
from /Users/.../.rvm/rubies/ruby-1.9.2-p320/bin/irb:16:in `<main>'
Why is this happening? Isn't to_xml a method of Hash?
require this:
require "active_support/all"
Related
I wrote a small script that try to read data from a .yml file using DataMagic.
require 'watir-webdriver'
require 'data_magic'
DataMagic.yml_directory="/home/krishna/RUBY/"
DataMagic.load "testdata.yml"
testData = data_for("testdata.yml/Testcase_01")
puts "#{testData[:username]}"
when i execute this i am getting an error
hashdata.rb:7:in `<main>': undefined method `data_for' for main:Object (NoMethodError)
Tell me what i am missing. Thanks.
require 'watir-webdriver'
require 'data_magic'
include DataMagic
DataMagic.yml_directory="/home/krishna/RUBY/"
testData = data_for("testdata/Testcase_01")
puts "#{testData['username']}"
I am using Nokogiri to scrape data from a HTML document, but I'm running into the following error:
`block in <main>': undefined method `[]' for nil:NilClass (NoMethodError)
This is the code to reproduce the problem:
require 'rubygems'
require 'nokogiri'
require 'open-uri'
url = "http://www.somewebsite.com/somepage/some"
doc = Nokogiri::HTML(open(url))
puts doc.at_css("title").text
doc.css(".Info_listing").each do |x|
puts x.at_css(".MoreInfo")[:href]
end
Does anyone know why I'm getting this error?
at_css will return nil if there's no matching element.
If you want to get MoreInfo class element inside Info_listing-class element, you'd better to use following code:
doc.css(".Info_listing .MoreInfo").each do |x|
puts x[:href]
end
I want to see the hash created by the function Digest::SHA2.hexdigest. I do not have Ruby installed, so I went for the online irb. Typing
Digest::SHA2.hexdigest("hello")
gives
=> #<NameError: uninitialized constant Digest>
Is it possible to add the needed library in any online irb?
You need to do as below :
2.0.0-p0 :003 > require 'digest'
=> true
2.0.0-p0 :004 > Digest::SHA2.hexdigest("hello")
=> "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824"
2.0.0-p0 :005 >
So do first require 'digest'.
Try in tutorialspoint
When I try this with roo gem:
irb(main):001:0> require 'roo'
=> true
irb(main):002:0> oo = Excel.new("C:/Users/Abash/Desktop/test1.xls")
**NameError: uninitialized constant Excel** from (irb):2
from C:/Ruby193/bin/irb:12:in `<main>'
When I try this with spreadsheet gem:
irb(main):001:0> require 'spreadsheet'
=> true
irb(main):002:0>Spreadsheet.client_encoding = 'UTF-8'
=> "UTF-8"
irb(main):003:0> book = Spreadsheet.open 'C:/Users/Abash/Desktop/test1.xls'
**Errno::EACCES: Permission denied** - C:/Users/Abash/Desktop/test1.xls
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/spreadsheet-0.8.2/lib/spreadsheet.rb:69:in `initialize'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/spreadsheet-0.8.2/lib/spreadsheet.rb:69:in `open'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/spreadsheet-0.8.2/lib/spreadsheet.rb:69:in `open'
from (irb):3
from C:/Ruby193/bin/irb:12:in `<main>'
Can somebody show me a work around for these errors?
I believe you are using ruby 1.9 or above version. In such a case,you need to specify the gem while creating a new instance.
require 'roo'
s =Roo::Excel.new("myspreadsheet.xls")
s =Roo::Excelx.new("myspreadsheet.xlsx")
I am looking to use ActionView::Helpers::NumberHelper from a Ruby script.
What all do I need to require etc.?
~> irb
ruby-1.9.2-p180 :001 > require 'action_view'
=> true
ruby-1.9.2-p180 :002 > ActionView::Base.new.number_to_currency 43
=> "$43.00"
As of Rails 3.2.13, you can do the following:
class MyClass
include ActionView::Helpers::NumberHelper
def my_method
...
number_with_precision(number, precision: 2)
...
end
end
You might need to require 'action_view' too.
Edit: This answer is still valid in Rails 4.2.3.