Download E-books Ruby Pocket Reference PDF

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Updated for Ruby 2.2, this convenient reference bargains short but transparent motives of Ruby’s middle elements—from operators to blocks to documentation creation—and highlights the main positive aspects you could paintings with each day. want to know the proper syntax for a conditional? Forgot the identify of that String procedure? This publication is prepared that can assist you locate the evidence fast.

Ruby Pocket Reference, 2d Edition is perfect for knowledgeable programmers who're new to Ruby. no matter if you’ve come to Ruby due to Rails, otherwise you are looking to make the most of this fresh, robust, and expressive language for different purposes, this reference can assist you simply pinpoint the knowledge you need.

You’ll locate specific reference fabric for:

  • Keywords, operators, reviews, numbers, and symbols
  • Variables, pre-defined worldwide variables, and ordinary expressions
  • Conditional statements, technique use, sessions, and exception handling
  • Methods for the BasicObject, item, Kernel, String, Array, and Hash classes
  • Time formatting directives
  • New syntax for the reason that Ruby 1.9

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1. 1, 1. 1. zero, 1. zero. zero, zero. nine. four, zero. nine. three, zero. nine. 2, zero. nine. 1, zero. eight. 1, zero. eight. zero, zero. 7. 1, zero. 7. zero, zero. 6. 2, zero. 6. 1, zero. 6. zero, zero. five. zero) internet provider aid for motion Pack. [truncated] set up or replace Rake (make à los angeles Ruby, mentioned within the subsequent section). you'll desire root privileges to do that (essentially, you’ll want a root password). i exploit sudo (http://www. gratisoft. us/sudo) to do that: $ sudo gem set up rake caution: fallacious use of the sudo command may lead to information loss or the deletion of significant approach records. Please double-check your typing while utilizing sudo. variety "man sudo" for additional info. To continue, input your password, or kind Ctrl-C to abort. Password: Bulk updating Gem resource index for: http://gems. rubyforge. org effectively put in rake-0. 7. 2 fitting ri documentation for rake-0. 7. 2... fitting RDoc documentation for rake-0. 7. 2... a hundred thirty | Ruby Pocket Reference Rake A construct software is helping you construct, assemble, or in a different way procedure documents, occasionally huge numbers of them. Rake is a construct device like make (http://www. gnu. org/software/make) and Apache ant (http://ant. apache. org), however it is written in Ruby. it truly is utilized by Ruby many purposes, not only Rails. Rails operations use Rake often, so it really is worthy pointing out the following. Rake makes use of a Rakefile to determine what to do. A Rakefile includes named projects. if you happen to create a Rails undertaking, a Rakefile is immediately created that can assist you take care of various jobs, reminiscent of working assessments and looking out at undertaking records. (After making a Rails undertaking with one of many tutorials less than, whereas typically Rails undertaking listing, run rake --tasks or rails stats to get a taste of what Rake does. ) Rake was once written by way of Jim Weirich (http://onestepback. org). You’ll locate documentation on Rake at http://rake. rubyforge. org. also, you’ll discover a strong creation to Rake, through Martin Fowler, at http://www. martinfowler. com/articles/rake. html. money to determine even if Rake is current: $ rake --version rake, model zero. 7. 2 If this command fails, use RubyGems to put in Rake, as proven within the earlier part. To run Rake aid, sort: $ rake --help utilization: rake [-f rakefile] {options} targets... Rake | 131 Options: --classic-namespace (-C) positioned job and FileTask within the top-level namespace. --dry-run (-n) Do a dry run with no executing activities. --help (-H) reveal this support message. --libdir=LIBDIR (-I) contain LIBDIR within the seek course for required modules. --nosearch (-N) don't seek father or mother directories for the Rakefile. --prereqs (-P) demonstrate the initiatives and dependencies, then go out. --quiet (-q) don't log messages to plain output. --rakefile (-f) Use dossier because the Rakefile. --rakelibdir=RAKELIBDIR (-R) Auto-import any . rake documents in RAKELIBDIR (default is rakelib). --require=MODULE (-r) Require MODULE sooner than executing Rakefile. --silent (-s) Like --quiet, but additionally suppresses the in listing statement. --tasks (-T) reveal the projects (matching non-compulsory trend) with descriptions, then go out. 132 | Ruby Pocket Reference --trace (-t) activate invoke/execute tracing; let complete backtrace.

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