programming ruby 2nd edition the pragmatic programmer s guide pdf

programming ruby the pragmatic programmer's guide

... argument list appearsbetween vertical bars. In this instance, the variable f receives the value passed to the yield, so the block prints successive members of the series. (This examplealso shows parallel ... 'drum' => 'percussion', 'oboe' => 'woodwind', 'trumpet' => 'brass', 'violin' => 'string'}Hashes ... 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 arraymethods starts on page 282.HashesHashes...

Programming Ruby (2nd edition) ppt

Danh mục: Kỹ thuật lập trình

... recommend usingparenthe ses in all but the simplest cases.This example also shows some Ruby string objects. You have many ways to createa string object, but probably the most common is to use string ... 0histogram['key1'] = histogram['key1'] + 1histogram['key1'] → 1Array and hash objects have lots of useful methods: see the discussion starting onpage40, an d the reference sections starting ... book is a heavily revised version of the book Programming Ruby, originally published by AddisonWesley. This book is printed with their permission.Our Pragmatic courses, workshops, and other...

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Tài liệu Oracle Call Interface Programmer''''s Guide pdf

Danh mục: Cơ sở dữ liệu

... Pools 9-19Using Tags in Session Pools 9-19OCI Handles for Session Pooling 9-19Using OCI Session Pooling 9-20OCI Calls for Session Pooling 9-21Example of OCI Session Pooling 9-23When to Use ... 15-24OCIServerAttach() 15-27OCIServerDetach() 15-30OCISessionBegin() 15-31OCISessionEnd() 15-35OCISessionGet() 15-36OCISessionPoolCreate() 15-40OCISessionPoolDestroy() 15-44OCISessionRelease() ... ensure the safe use of such applications if the Programs are used forsuch purposes, and Oracle Corporation disclaims liability for any damages caused by such use of the Programs.Oracle is a...

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The C programming Langguage 2nd Edition

Danh mục: Kỹ thuật lập trình

... thatends a block. 3.2 If-Else The if-else statement is used to express decisions. Formally the syntax is if (expression) statement1 else statement2where the else part is optional. The expression ... popularstyles. Pick a style that suits you, then use it consistently. Most of the work gets done in the body of the loop. The Celsius temperature is computed andassigned to the variable celsius ... instead. Since an if tests the numeric value of an expression, certain coding shortcuts are possible. The most obvious is writing if (expression)instead of if (expression != 0)Sometimes...

The Complete Idiot's Guide to Grammar & Style 2nd Ed (2003)

Danh mục: Ngữ pháp tiếng Anh

Tài liệu Programming Android, 2nd Edition doc

Danh mục: Hệ điều hành

... publishers like O’Reilly Media, Prentice Hall Professional, Addison-WesleyProfessional, Microsoft Press, Sams, Que, Peachpit Press, Focal Press, Cisco Press, JohnWiley & Sons, Syngress, Morgan ... http://developer.android.com /guide/ developing/tools/monkey.html.sqlite3Android uses SQLite as the database system for many system databases and providesAPIs for applications to make use of SQLite, which is convenient ... have the prerequisites for the Android SDK,and are ready to install the SDK. The Android SDK is a collection of files: libraries,executables, scripts, documentation, and tools. Installing the SDK...

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The Little Book of SEMAPHORES (2nd Edition)-The Ins and Outs of Concurrency Control and Common Mistakes docx

Danh mục: Kỹ thuật lập trình

... primitives (mutexes, semaphores, mon-itors, and sometimes condition variables), and classical problems like readers-writers and producers-consumers.When I took the Operating Systems class at Berkeley, ... as the number of components increases, the number ofinteractions grows unmanageably.Nevertheless, I found patterns in the solutions I saw, and discovered atleast some systematic approaches ... most of them were able to solve most of the puzzles. In somecases they reinvented classical solutions; in other cases they found creative newapproaches. 3.6 Reusable barrier 353.6.2 Reusable...

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programming perl 2nd edition - o'reilly 1996

Danh mục: Kỹ thuật lập trình

... classes you can get the additional benefits of indirect software reuse when the class you're using turns around and reusesother classes that it gets some characteristics from. But this is ... length($1)/';$DB::alias{'stop'} = &apos ;s/ ^stop (at|in)/b/';$DB::alias{'ps'} = &apos ;s/ ^ps\b/p scalar /';$DB::alias{'quit'} = &apos ;s/ ^quit\b.*/exit/'; ... And to the minimalists in the crowd, Perl seems like apointless exercise in redundancy. But that&apos ;s okay. The world needs a few reductionists (mainly asphysicists). Reductionists like to...

o'reilly - programming c#, 2nd edition

Danh mục: Kỹ thuật lập trình

... abstract classes, which exist only to be specialized, and a discussion of the root of all classes, the class Object. 5.1 Specialization and Generalization Classes and their instances (objects) do ... treated as if they were instances of more general classes, a process known as polymorphism. This chapter ends with a consideration of sealed classes, which cannot be specialized, as well as abstract ... access modifier.) The identifier is the name of the class that you provide. The optional base-class is discussed in Chapter 5. The member definitions that make up the class-body are enclosed...

o'reilly - programming python 2nd edition

Danh mục: Kỹ thuật lập trình

... that sort and sum lines in the standard input stream. Example 2-7. PP2E\System\Streams\sorter.py import sys lines = sys.stdin.readlines( ) # sort stdin input lines, lines.sort( ) # send result ... \PP2E\System>python testargv.py ['testargv.py'] C:\ \PP2E\System>python testargv.py spam eggs cheese ['testargv.py', 'spam', 'eggs', 'cheese'] ... turns out to be a key concept in some scripts' execution: it&apos ;s always the implicit place where files processed by the script are assumed to reside, unless their names have absolute...

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programming clojure 2nd edition

Danh mục: Kỹ thuật lập trình

... have successfullyinstalled the book samples. The book samples are all unit tested, with tests located in the e x a m p l e s / t e s tdirectory. The tests for the samples themselves are not ... erratum ã discussForms ã 23www.it-ebooks.info Many of the designations used by manufacturers and sellers to distinguish their productsare claimed as trademarks. Where those designations appear ... Variables The REPL includes several useful special variables. When you are working in the REPL, the results of evaluating the three most recent expressions arestored in the special variables *1,...

programming interactivity 2nd edition

Danh mục: Kỹ thuật lập trình

... andunambiguous for users and for the system.One of the most difficult tasks in creating interactive applications is to understand how the system sees messages from users and how the user sees messages ... a secondary task. This is where you begin to see the real complexities of communication between users and systems. The user is commu-nicating with a system and asks the system to perform some ... entities fully commu-nicating because the regulated system doesn’t respond—it simply changes itsbehavior—but it does involve continuous systems. Systems can perform this task ontheir own as well,...

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cosmology the origin and evolution of cosmic structure, 2nd edition the origin and evolution of cosmic structure

Danh mục: Đại cương

... ofthis idea, as we discuss in Section 4.7. If celestial objects (such as galaxy clusters,galaxies, radio sources, quasars, etc.) are distributed homogeneously and isotrop-ically on large scales, ... an observer is justl =L4πr2(1.9.1)if one neglects absorption. This is the same as Equation (1.7.1). Let us assume,for simplicity, that all stars have the same absolute luminosity and the ... in sucha way that these conditions are the same in each of the regions? One eitherhas to suppose that causal physics is not responsible for this homogeneity, orthat the calculation of the...