Scheme Language Lisp done right, according to some. Others prefer CommonLisp, right at the other end of the oversimplified/baroque - or, if you prefer, elegant/full-featured - axis. Standard Scheme as defined by the RevisedReportOnAlgorithmicLanguageScheme is deliberately minimalistic. SchemeRequestsForImplementation provide de facto standards for often needed (and often requested) features and extensions, like record types, multi-threading, exception handling and localization. On getting the code for a procedure: R5RS does not define an external representation for procedure objects and closures, so there is no portable answer. Moved from LearningScheme An excellent way to learn Scheme (and a lot more besides!) Evaluator in Silicon See SchemeImplementations, LispSchemeDifferences, SchemeMacros, SchemeWiki, SocialProblemsOfLisp, CallWithCurrentContinuation, MitScheme CategoryProgrammingLanguageCategoryScheme
An introduction to Objective-C If you are serious about becoming an iOS developer then it is imperative that you learn Objective-C which is an extension of the C language. If you already have experience with an object-oriented language then learning Objective-C should be quite straightforward. Never written a line of code? If you’ve never written a line of code and are interested in developing iOS apps then I would highly recommend picking up either of these books: Programming in Objective-C or Cocoa Book Basic Syntax for a Class Most object oriented languages have something called a class which encapsulates data and provides access to it. All classes are declared in two parts: .h – contains the interface which is a declaration of the class structure .m – contains the implementation of all the methods The member variables by default are set to private hence you have to write accessor methods which are your getter and setter methods. Methods There are two types of methods in Objective-C: class methods and instance methods.
Structure and Interpretation of Computer Programs A powerful programming language is more than just a means for instructing a computer to perform tasks. The language also serves as a framework within which we organize our ideas about processes. Thus, when we describe a language, we should pay particular attention to the means that the language provides for combining simple ideas to form more complex ideas. Every powerful language has three mechanisms for accomplishing this: primitive expressions, which represent the simplest entities the language is concerned with,means of combination, by which compound elements are built from simpler ones, andmeans of abstraction, by which compound elements can be named and manipulated as units. In programming, we deal with two kinds of elements: procedures and data. In this chapter we will deal only with simple numerical data so that we can focus on the rules for building procedures.4 In later chapters we will see that these same rules allow us to build procedures to manipulate compound data as well.
MIT/GNU Scheme MIT/GNU Scheme is an implementation of the Scheme programming language, providing an interpreter, compiler, source-code debugger, integrated Emacs-like editor, and a large runtime library. MIT/GNU Scheme is best suited to programming large applications with a rapid development cycle. Release status and future plans The releases provide binaries that run on i386 and x86-64 machines under the following operating systems: GNU/Linux, OS X, and Windows. We additionally provide binaries for selected other architectures and systems, depending on the hardware and software that is available to us. We no longer support OS/2, DOS, or Windows systems prior to XP. Recent release notes are here. In the future, we plan to deploy a new portable virtual machine and implement a module system. Download MIT/GNU Scheme is available in binary form for a variety of systems. Older versions can be downloaded here. Documentation Please report bugs using the bug-tracking system. Getting involved Development Maintainer
Installing iOS SDK and Xcode on Windows 7 | The iPod touch Weblog - Apple News, Tricks, and Themes Update 2: August 17, 2011 The TechExxpert guide has been updated to fully allow Xcode 4.1 to work. Sorry that the past fixes did not work. Thanks for the comments! Please let me know if this guide works/doesn't work. Update: This guide has been modified to the latest updates as of August 2, 2011 including the latest Xcode 4.1 and OS X Lion 10.7. Apple has been adamantly refusing to create an iPhone SDK support for Windows-based machines. The following steps involve installing a virtual machine on your PC, updating the virtual machine to 10.7 , then running the machine and downloading and installing the iOS SDK and Xcode on to the virtual machine. There are other ways to install OS X on your machine but they involve creating a new partition and installing the Operating System directly to your hard drive. The process will take 2-3 hours, but most of the time is consumed by large downloads. 1. 2. 3. 4. 6. 7. Now you can start coding an app for your personal use.
Simple Scheme, for Android I was on the train, wanted to write some code, and I though, "I wonder if there are any good Scheme implementations for my phone?". I didn't find any that were simple, easy to use, and efficient (the first one I installed crashed my phone). I also wanted to be able to write graphical and interactive programs easily (see image examples and/or big-bang/interaction examples). So... I started an implementation of all the major features I could think of (see traditional Scheme forms and examples). The execution needed to be tail-recursive, and even non-tail-recursive functions shouldn't run out of stack space, so I implemented a continuation-passing style interpreter with efficient binding and lookup. While I tried to remain faithful to the term "Scheme-like", I made a few changes to the language (and the implementation) to make the it a little easier. Like traditional Scheme, Simple Scheme supports define, define-struct, begin, let, and many other forms/expressions. Simple stuff... Symbols...
Scheme (programming language) The Scheme language is standardized in the official IEEE standard, and a de facto standard called the Revisedn Report on the Algorithmic Language Scheme (RnRS). The most widely implemented standard is R5RS (1998), and a new standard R6RS was ratified in 2007. Scheme has a diverse user base due to its compactness and elegance, but its minimalist philosophy has also caused wide divergence between practical implementations, so much that the Scheme Steering Committee calls it "the world's most unportable programming language" and "a family of dialects" rather than a single language. A new language standardization process began at the 2003 Scheme workshop, with the goal of producing an R6RS standard in 2006. This process broke with the earlier RnRS approach of unanimity. R6RS features a standard module system, allowing a split between the core language and libraries. The final report of R7RS (small language) has been available since 2013-07-06. Example: a simple counter
Frink What's New * FAQ * Download * Frink Applet * Web Interface * Sample Programs * Frink Server Pages * Frink on Android * Donate About Frink Frink is a practical calculating tool and programming language designed to make physical calculations simple, to help ensure that answers come out right, and to make a tool that's really useful in the real world. It tracks units of measure (feet, meters, kilograms, watts, etc.) through all calculations, allowing you to mix units of measure transparently, and helps you easily verify that your answers make sense. It also contains a large data file of physical quantities, freeing you from having to look them up, and freeing you to make effortless calculations without getting bogged down in the mechanics. Perhaps you'll get the best idea of what Frink can do if you skip down to the Sample Calculations further on this document. Frink was named after one of my personal heroes, and great scientists of our time, the brilliant Professor John Frink. Features