By David Thomas, Andrew Hunt
ISBN-10: 0201710897
ISBN-13: 9780201710892
Ruby is an more and more renowned, absolutely object-orienteddynamic programming language, hailed through many practitioners because the best and most precious language to be had this day. while Ruby first burst onto the scene within the Western international, the Pragmatic Programmers have been there with the definitive reference guide, Programming Ruby: The Pragmatic Programmer's Guide.Now in its Seco, writer Dave Thomas has accelerated the recognized Pickaxe e-book with over 2 hundred pages of latest content material, overlaying all of the new and greater language positive factors of Ruby 1.8 and traditional library modules. The Pickaxe comprises 4 significant sections:An acclaimed instructional on utilizing Ruby.The definitive connection with the language.Complete documentation on all integrated periods, modules, and methodsComplete descriptions of all ninety eight ordinary libraries.If you loved the Fir, you are going to enjoy the hot and multiplied content material, together with: greater assurance of deploy, packaging, documenting Ruby resource code, threading and synchronization, and embellishing Ruby's functions utilizing C-language extensions. Programming for the world-wide net is straightforward in Ruby, with new chapters on XML/RPC, cleaning soap, allotted Ruby, templating structures and different internet companies. there is even a brand new bankruptcy on unit testing.This is the definitive reference guide for Ruby, together with an outline of all of the commonplace library modules, an entire connection with all integrated sessions and modules (including greater than 250 major alterations because the First Edition). insurance of alternative positive aspects has grown enormously, together with information on the way to harness the subtle functions of irb, so that you can dynamically research and scan along with your working code. "Ruby is a perfectly strong and valuable language, and every time i am operating with it this ebook is at my part" -Martin Fowler, leader Scientist, ThoughtWorks"
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Extra resources for Programming Ruby: The Pragmatic Programmers' Guide
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Type, " ", num, "\n" num *= num end produces: Fixnum Fixnum Fixnum Fixnum Bignum Bignum Bignum 8 64 4096 16777216 281474976710656 79228162514264337593543950336 6277101735386680763835789423207666416102355444464034512896 You write integers using an optional leading sign, an optional base indicator (0 for octal, 0x for hex, or 0b for binary), followed by a string of digits in the appropriate base. Underscore characters are ignored in the digit string. 123456 123_456 -543 123_456_789_123_345_789 0xaabb 0377 -0b101_010 # # # # # # # Fixnum Fixnum (underscore ignored) Negative Fixnum Bignum Hexadecimal Octal Binary (negated) You can also get the integer value corresponding to an ASCII character or escape sequence by preceding it with a question mark.
If you want to delete a file, you call the class method File::delete, passing in the name. delete("doomedFile") Class methods are distinguished from instance methods by their definition. Class methods are defined by placing the class name and a period in front of the method name. classMeth end # class method end Jukeboxes charge money for each song played, not by the minute. That makes short songs more profitable than long ones. We may want to prevent songs that take too long from being 32 available on the SongList.
3] = [] » ["dog", "cat", 9] a[5] = 99 » ["dog", "cat", 9, nil, nil, 99] Arrays have a large number of other useful methods. Using these, you can treat arrays as stacks, sets, queues, dequeues, and fifos. A complete list of array methods starts on page 282. Hashes Hashes (sometimes known as associative arrays or dictionaries) are similar to arrays, in that they are indexed collectives of object references. However, while you index arrays with integers, you can index a hash with objects of any type: strings, regular expressions, and so on.
Programming Ruby: The Pragmatic Programmers' Guide by David Thomas, Andrew Hunt
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