Ruby’s yielding methods
To demonstrate a yielding method, I created A user-management class containing registered_users method. The method will return an array of the registered user’s hash if no block is given. Otherwise […]
Ruby
Modules in Ruby
When should I write modules in a Ruby project? The short answer is whenever you have have an implementation that is “something-able”. Abstract classes in C++, Java or Protocols in […]
Wrapping the NIX mount command in ruby
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class MountedPartitions attr_reader :list def initialize @list = [] lines = %x[mount].split("\n") lines.each { |line| line_parts = line.split(" ") @list << {:partition_path => line_parts[0], :mount_point => line_parts[2], :type => line_parts[4]} } rescue raise RuntimeError, "Probably not running a NIX system" end end |
For example…
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mp = MountedPartitions.new mp.list.each { |p| puts p[:partition_path] puts p[:mount_point] puts p[:type] } |
Ruby script: Where Is the Damn File
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#!/usr/bin/env ruby require 'find' module Find def match(what, *paths) what.downcase! find(*paths) { |path| begin puts path if File.file?(path) && File.readable?(path) && File.basename(path).downcase.include?(what) rescue Exception => e puts e.message end } end module_function :match end if ARGV.empty? puts "Where Is the Damn File" puts "usage: widf a_file_to_find" exit end Find.match(ARGV.join(" "), "/") |
Serialize ruby object using YAML
The example object
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require 'yaml' class Person attr_accessor :first_name, :last_name def initialize(first_name, last_name) @first_name = first_name @last_name = last_name end def save_to_file(file_path) File.open(file_path, "w") { |f| f.write(self.to_yaml) } end def self.load_from_file(file_path) p = YAML::load_file(file_path) end end |
Now lets test
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p = Person.new("Johnny", "Boy") p.save_to_file("./text/self.yaml") p2 = Person.load_from_file("./text/self.yaml") puts p2.first_name + " " + p2.last_name |
A Ruby gem for generating a list of all the countries and provinces using Yahoo’s YQL.
This one is my first ruby gem and can be found on github To use, add this line to your application’s Gemfile:
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gem 'yahoo_countries_and_provinces' |
And in your code
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#require the file require "yahoo_countries_and_provinces" #To get a list of the countries in english country_array = YahooCountriesAndStates::countries("en") #To get a list of the countries in swedish country_array = YahooCountriesAndStates::countries("sv") #To get Germany's provinces in english provinces_array = YahooCountriesAndStates::provinces("Germany", "en") |
Ruby – Writing thread-safe code
Lets say that we have to write some text to a file several time in our code but we are afraid that we will try to open the file more […]
Playing with Ruby. A password generating class
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require "securerandom" class PasswordGenerator def initialize(maxlength = 32) if maxlength > 32 raise 'The max length can not exceed 32 characters' end @maxlength = maxlength end def generate() SecureRandom.uuid.gsub('-', '')[0..@maxlength-1] end end |