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Ruby 1.9.3-p374 is released. Ecrire dans un fichier en ruby. Parsing an text file. Hi, I cannot find a way to easily parse a text file.

Parsing an text file

I am just starting to learn ruby so please bear with me. My text file looks like this: 0 8 2 9 3 0 0 4 9 2 8 3 9 3 0 2 2 3 4 9 8 8 9 0 Basically just numbers and spaces. So far, I know how to read the file and put each line into an array. def readfile(file) arr = IO.readlines(file) parsing(arr) end def parsing(arr) string1 = arr[0].to_s string2 = arr[1].to_s string3 = arr[2].to_s ans.each_byte {|b|p b.chr} end What I wanted to do is, for example, want to find all 8's and change it to 5's. I am stuck on how I can use the string and search each char's to find the 8's and then change it. Also I would like to know if there is a for loop or something to go through each array and store it into a new string because there might be more than 3 lines.

Thanks for your fast answer. Johnathan Wagner wrote: > Thanks for your fast answer. >> One last question, if you can help me. >> How can I compare each characters in a string? Fred_clx: “@aifsai. Speaking UNIX, Part 14: Manage Ruby and gems with RVM. Although Internet Relay Chat, forums, and revision control tools such as Git and Github make distributed development a snap, reproducing another developer's environment can be quite maddening.

Speaking UNIX, Part 14: Manage Ruby and gems with RVM

Propping up an existing body of code on a new development machine requires matching with at least some and potentially all of the original coder's stack, or many prerequisite software components that power the application. A stack may demand a type of operating system (say, UNIX®, Linux®, Mac OS, or Windows®); a specific operating system version (Ubuntu 10 or 11? Mac OS X 10.6 Snow Leopard or 10.7 Lion?) ; a minimum collection of built-in and supplemental system libraries and header files; a supporting cast of daemons and services (MySQL or PostgreSQL?) ; and, of course, any number of language-specific resources, from the compiler to a specific patch level of supporting open source code.

Ruby version 1.8 is still in use, while Ruby version 1.9 is preferred in more recent coding efforts. Back to top. Ruby - inserting and deleting nokogiri XML nodes and elements. Ruby for systems administrators. Introduction Ruby is a highly feature-rich, free, simple, extensible, portable, and object-oriented scripting language.

Ruby for systems administrators

It has gained immense popularity of late on the worldwide Web. This popularity can at least partly be attributed to the very powerful Web application development framework, Rails, which is written in Ruby. Ruboto: Ruby on Android. Introduction Most of the interesting work in software development today occurs at one of the two extremes: huge cloud servers and tiny mobile devices.

Ruboto: Ruby on Android

These domains solve significantly different problems, and, correspondingly, have different tool support. Server development often uses scripting languages to tie together different components and accomplish sophisticated automated tasks, while mobile development focuses on the particular capabilities and needs of a particular device and user. However, these two extremes share a common language: Java™. Whether Android or the Spring framework, many of the most popular technologies today have adopted a language that's widely understood and supported around the world.

This article explores Ruboto, a project that bridges the gap between scripting languages and Android. Back to top. How to parse CSV data with Ruby - Ruby - csv, parse, ruby, fastercsv, ccsv, csvscan, excelsior. Ruby alternatives for parsing CSV files Ruby String#split (slow) Built-in CSV (ok, recommended) ccsv (fast & recommended if you have control over CSV format) CSVScan (fast & recommended if you have control over CSV format) Excelsior (fast & recommended if you have control over CSV format) CSV library benchmarks can be found here and here Parsing with plain Ruby filename = 'data.csv' file =, 'r') file.each_line("\n") do |row| columns = row.split(",") break if file.lineno > 10end This option has several problems…

How to parse CSV data with Ruby - Ruby - csv, parse, ruby, fastercsv, ccsv, csvscan, excelsior

Connect to https site with Nokogiri (Page 1) - Controllers and Views. Programmation Ruby/Types standards. Un livre de Wikilivres.

Programmation Ruby/Types standards

<< Retour au sommaire Nous allons voir ici tous les types que nous pouvons considérer comme "standards", dans le sens où nous les retrouvons dans la plupart des langages, et que ceux-ci sont directement intégrés à l'interpréteur (built-in). Néanmoins il ne faut pas perdre de vue qu'il s'agit en réalité d'objets. Pour rappel les méthodes dont le nom se termine par ! Sont non pures : elles modifient l'objet. Chaîne de caractères[modifier | modifier le wikicode] Rubyxp - Ruby regular expression tester. Ruby QuickRef. Table of Contents Language General Tips These are tips I’ve given over and over and over and over… Use 2 space indent, no tabs.

Ruby QuickRef

Use [] over See for more. General Syntax Rules. Getting Started with Nokogiri. We're decided to mix up the Engine Yard blog a little and invite some community members to contribute guest posts.

Getting Started with Nokogiri

This one (our first!) Is from [Aaron Patterson]( -- a long-time member of the Ruby community, and the creator of Nokogiri. He hacks with the developers of Seattle.rb, and travels the world to speak about Nokogiri and other Ruby topics at industry conferences and events. Nokogiri is a library for dealing with XML and HTML documents. I wrote Nokogiri along with my (more attractive) partner in crime, Mike Dalessio. Top 5 Tutorials on Ruby on Rails. Ruby on Rails is a new kid in the block into the world of Web application development that is rapidly gaining interest, even though it is in beta versions.

Top 5 Tutorials on Ruby on Rails

These days, I am trying to get my hands dirty with Ruby on Rails using various tutorial posts and also some books. Over the coming days, i will try to share my learnings with you through the blog. Below, in this post, I am putting up a list of Top 5 Tutorials to get you started on Ruby on Rails (RoR). These are infact tutorials, i am going through in order to learn RoR. Ruby Cheatsheet. Just Enough Ruby for Chef - Chef - Opscode Open Source Wiki. Ruby in Twenty Minutes. Introduction This is a small Ruby tutorial that should take no more than 20 minutes to complete.

Ruby in Twenty Minutes