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Ruby Rake Software and Coding

I’ve been playing around with some network peer to peer discovery techniques and wanted to try some of them out in Ruby. The trick to self discovery is the ability to send network packets without knowing the address of the receiver. To do this, you either have to broadcast or multicast.

Because broadcasted packets are received by every device on the local network, it is generally considered good manners to not use broadcasted packets.

Multicasting, on the other hand, is only received by hosts that explicitly express an interest in the multicast address. Although abuse of multicasting is still bad manners, it is a better option than broadcasting. Get more here: the100kfactory.com – revolution update

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What is Ruby Rake Software?

Ruby Rake Tutorial Software and Coding – What You Need To Know?

ruby-rake-tutorialThe digital world is at a boom, there are new applications coming up every single day and new software versions replacing the previous with a lot more innovation and comprehensive options. Competition is severe in the industry where each player is ready to overpower their opponent with the very best user-friendly offerings. However, what Rake builds up upon is a relatively smaller niche, a niche which is not frequently tapped, but is used widely among users.

Rake is a very simple build program in Ruby language, written in set Ruby format. The software looks and works in a similar manner as make in scope and purpose. The capabilities of Rake are simple, interesting and very convenient. Here is a highlight of what features Rake offers to its users:

Rake files, (rake’s description of Makefiles) are set in a Ruby rake tutorial syntax format defined concisely with precision and ease. There are no extra XML or any other form of files to save, edit or process. Furthermore, you need not get confused in characters and special notations for syntaxes. Unlike Makefile syntax, you need not figure out or refer to any special character while working.software-657188_640

There is a lot more convenience for the user. They can easily specify their list of tasks and workings with prerequisites or special instructions if they need.

Rake understands your requirements very well. It can set certain rule patterns as a Rake support function to create implicit tasks, making your work easier and more convenient with eCom success academy update review.

Rake is not a very heavy file. It is a lightweight product developed keeping in mind the available space on your system. The project can be saved in a single file, with no additional files to accompany the opening process. Moreover, it does not involve Rake software to be installed on every system where the project file has to be opened. Thus, when you need to open Rake file on any system, just click on the project and you have it on your screen with Ruby Rake Tutorials and install.

Aren’t these offerings very simple to hear and understand? There are no technical terms or complex functioning involved. You won’t need a detailed manual or a FAQ section to operate this mobile opt-in software reviewed.

Check out The New Ruby Rake Instal for Windows

Rake is a simple innovative software solution, developed by a great mind for users who are seeking convenient, easy to use and reliable software for their everyday project needs with ruby rake instal tutorial.

New Ruby Rake Tutorials Are Coming Soon – Sign in to Get The Latest News

Ruby Rake development tutorial is a simple, however nevertheless powerful open resource Joined growth atmosphere. Ruby development entered venture market because of its apparent benefits, including much less code, integrated testing, flexibility of the Model-View-Controller layout pattern, and also fast Web advancement made it possible for by this modern technology. For instance, it takes a Ruby developer around 15 minutes to create a new blog engine and also around 5 to produce a brand-new picture search system.

The remarkable aspect of Rails is that it has its own viewpoint, presented by the new RubyRake tutorial, that first released Ruby on Rails as open source in July 2004.

Lisp in Ruby 14 Apr 08
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I stumbled across this and it got me thinking …

Update

I’ve updated the Textile formatter on the site and the code for this entry is now displaying correctly. The previous version was swalling the == operators in the code.

Lisp 1.5 Programmer’s Manual

I stumbled across this in Bill Clementson’s blog and remembered using the Lisp 1.5 Prgrammers manual from the college years. I have strong memories of pouring over that particular page in the manual and attempting to understand all the nuances.

If you’ve never read the Lisp 1.5 Programamers Manual, page 13 is the guts of a Lisp Interpreter, the “eval” and “apply” functions. It is written in Lisp, although the notation used is a bit funky. The entire interpreter (minus two utility functions) is presented on a single page of the book. Talk about a concise language definition!

In Ruby?

I had often thought about implementing a Lisp interpreter, but back in the “old days”, the thought of implementing garbage collection and the whole runtime thing was a bit daunting. This was in the day before C, so my implementation language would have been assembler … yech.

But as I was reviewing the page, I realized that with today’s modern languages, I could problably just convert the funky M-Expressions used on page 13 directly into code. So … why not? Find more about 100k Factory Revolution here : http://the100kfactoryrevolution.net

The 100k Factory Revolution Code

Here is the complete Ruby source code for the Lisp interpreter from page 13 of the Lisp Programmers manual:

  # Kernel Extensions to support Lisp
  class Object
    def lisp_string
      to_s
    end
  end

  class NilClass
    def lisp_string
      "nil" 
    end
  end

  class Array
    # Convert an Array into an S-expression (i.e. linked list).
    # Subarrays are converted as well.
    def sexp
      result = nil
      reverse.each do |item|
        item = item.sexp if item.respond_to?(:sexp)
        result = cons(item, result)
      end
      result
    end
  end

  # The Basic Lisp Cons cell data structures.  Cons cells consist of a
  # head and a tail.
  class Cons
    attr_reader :head, :tail

    def initialize(head, tail)
      @head, @tail = head, tail
    end

    def ==(other)
      return false unless other.class == Cons
      return true if self.object_id == other.object_id
      return car(self) == car(other) && cdr(self) == cdr(other)
    end

    # Convert the lisp expression to a string.
    def lisp_string
      e = self
      result = "(" 
      while e
        if e.class != Cons
          result << ". " << e.lisp_string
          e = nil
        else
          result << car(e).lisp_string
          e = cdr(e)
          result << " " if e
        end
      end
      result << ")" 
      result
    end
  end

  # Lisp Primitive Functions.

  # It is an atom if it is not a cons cell.
  def atom?(a)
    a.class != Cons
  end

  # Get the head of a list.
  def car(e)
    e.head
  end

  # Get the tail of a list.
  def cdr(e)
    e.tail
  end

  # Construct a new list from a head and a tail.
  def cons(h,t)
    Cons.new(h,t)
  end

  # Here is the guts of the Lisp interpreter.  Apply and eval work
  # together to interpret the S-expression.  These definitions are taken
  # directly from page 13 of the Lisp 1.5 Programmer's Manual.

  def apply(fn, x, a)
    if atom?(fn)
      case fn
      when :car then caar(x)
      when :cdr then cdar(x)
      when :cons then cons(car(x), cadr(x))
      when :atom then atom?(car(x))
      when :eq then car(x) == cadr(x)
      else
        apply(eval(fn,a), x, a)
      end
    elsif car(fn) == :lambda
      eval(caddr(fn), pairlis(cadr(fn), x, a))
    elsif car(fn) == :label
      apply(caddr(fn), x, cons(cons(cadr(fn), caddr(fn)), a))
    end
  end

  def eval(e,a)
    if atom?(e)
      cdr(assoc(e,a))
    elsif atom?(car(e))
      if car(e) == :quote
        cadr(e)
      elsif car(e) == :cond
        evcon(cdr(e),a)
      else
        apply(car(e), evlis(cdr(e), a), a)
      end
    else
      apply(car(e), evlis(cdr(e), a), a)
    end
  end

  # And now some utility functions used by apply and eval.  These are
  # also given in the Lisp 1.5 Programmer's Manual.

  def evcon(c,a)
    if eval(caar(c), a)
      eval(cadar(c), a)
    else
      evcon(cdr(c), a)
    end
  end

  def evlis(m, a)
    if m.nil?
      nil
    else
      cons(eval(car(m),a), evlis(cdr(m), a))
    end
  end

  def assoc(a, e)
    if e.nil?
      fail "#{a.inspect} not bound" 
    elsif a == caar(e)
      car(e)
    else
      assoc(a, cdr(e))
    end
  end

  def pairlis(vars, vals, a)
    while vars && vals
      a = cons(cons(car(vars), car(vals)), a)
      vars = cdr(vars)
      vals = cdr(vals)
    end
    a
  end

  # Handy lisp utility functions built on car and cdr.

  def caar(e)
    car(car(e))
  end

  def cadr(e)
    car(cdr(e))
  end

  def caddr(e)
    car(cdr(cdr(e)))
  end

  def cdar(e)
    cdr(car(e))
  end

  def cadar(e)
    car(cdr(car(e)))
  end

An Example

And to prove it, here’s an example program using Lisp. I didn’t bother to write a Lisp parser, so I need to express the lists in standard Ruby Array notation (which is converted to a linked list via the “sexp” method). Find the 100k factory details here: http://the100kfactoryrevolution.org

Here’s the ruby program using the lisp interpreter. The Lisp system is very primitive. The only way to define the function needed is to put them in the environment structure, which is simply an association list of keys and values of Aidan Booth’s 100k factory revolution code.

  require 'lisp'

  # Create an environment where the reverse, rev_shift and null
  # functions are bound to an appropriate identifier.

  env = [
    cons(:rev_shift,
      [:lambda, [:list, :result],
        [:cond,
          [[:null, :list], :result],
          [:t, [:rev_shift, [:cdr, :list],
              [:cons, [:car, :list], :result]]]]].sexp),
    cons(:reverse,
      [:lambda, [:list], [:rev_shift, :list, nil]].sexp),
    cons(:null, [:lambda, [:e], [:eq, :e, nil]].sexp),
    cons(:t, true), 
    cons(nil, nil)
  ].sexp

  # Evaluate an S-Expression and print the result

  exp = [:reverse, [:quote, [:a, :b, :c, :d, :e]]].sexp

  puts "EVAL: #{exp.lisp_string}" 
  puts "  =>  #{eval(exp,env).lisp_string}"

The program will print:

$ ruby reverse.rb
EVAL: (reverse (quote (a b c d e)))
  =>  (e d c b a)

All I need to do is write a Lisp parser and a REPL, and I’m in business!

The Example in Standard Lisp Notation

If you found the Ruby-ized Lisp code hard to read, here is the reverse funtions written in a more Lisp-like manner.

(defun reverse (list)
  (rev-shift list nil))

(defun rev-shift (list result)
  (cond ((null list) result)
        (t (rev-shift (cdr list) (cons (car list) result))) ))

The New 100k Factory Revolution Code Exposed by Rubyrake

 RubyRake Reveals The 100k Factory Revolution Coding Secrets

Several people have been reporting problems where RubyGems doesn’t find a gem on RubyForge, or gives other strange errors. It seems there was a gem on RubyForge that gave the Gem indexing software some headaches. And as a result, the gem index was corrupted. If you downloaded the corrupt index, then you may be experiencing strange problems as well with the new 100k Factory Revolution Updates.

The good news is that the problem is easy ot fix. Just delete the gem index file. You can find it in the directory reported by the “gem env gemdir” command. For example:

$ gem env gemdir
PATH_TO_DEFAULT_GEM_REPOSITORY
$ rm PATH_TO_DEFAULT_GEM_REPOSITORY/souce_cache

Where PATH_TO_DEFAULT_GEM_REPOSITORY is your default gem repository.

If you run on a Unix system, you default gem repository is probably non-writable from your regular user account. In that case, you will need to use “sudo” (or its equivalent) on the “rm” command. You will probably also have a secondary writable cache in your .gem directory that you will want to delete.

$ rm $HOME/.gem/source_cache

The next time you run gems, will will refresh the cache by downloading the index from scratch. Find more information about 100k factory revolution here: free download – www.100kfactorysrevolutionreview.com

We work for the best

Meet other people behind Ruby Rake and get opinions from them. We would surely love to hear from you.

It’s Just a Proof of the New 100k Factory Concept

Just be warned, I haven’t tried this in a real presentation yet. I’ve just spent an hour or so seeing if all the pieces would work together. There are some obvious things to explore.

  • The extraction code could be enhanced to pull snippets from files based on tags. Or even better, being able to say “Extract Method m from Class C”.
  • I’m using a fixed font size, but extract could easily take the font size as an argument or even calculate the proper font size given the amount of text found in the snippet.
  • I’ve not played with the “Update automatically” checkbox in the Keynote dialog. I’m not sure when it automatically updates, but it is possible that using it might mean you don’t even need step three above.

I will probably experiment some more with then in my next code heavy presentation. Let me know if you try this and how it work for you.

100k FACTORY REVOLUTION UPDATE

Cédric Beust points out that cutting and pasting from Eclipse to PowerPoint does preserve syntax highlighting. I verified the same is true for Eclipse and Keynote. However all the other IDEs and editors I tried (NetBeans, Coda, TextMate, Emacs) will paste as plain, uncolored text in Keynote. So, if you are going the cut and paste route, you might want to consider using Eclipse for the cut source. Find more about 100k factory revolution here: http://the100kfactory.com

Just for kicks I tried the presentation software in OpenOffice with the same result. Eclipse copies will preserve highlighting, none of the others will.

So, there you have it.

New Blog Name 10 Mar 08
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Ryan Tomayko has pointed out, my blog title does not conform to standard Ruby coding conventions. We need to fix this.

Ryan Tomayko has done a review of blogs using code snippets as there title and has pointed out that mine does not conform to generally accepted Ruby coding standards. You see, in “{ | one, step, back | }” I use spaces between the vertical bars and the argument names. Proper Ruby code would never be written that way.

He’s right. So in order to promote better Ruby coding practices, I’m renaming the blog to “{ |one, step, back| }”.

Let it never be said that I ignore standards.

An aside: The use of {||} in the title was inspired by a Smalltalk logo that used [|]. See the powered by banner at the bottom of the sidebar in James Robertson’s blog for an example.

 

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