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Smalltalk

Smalltalk is a purely object-oriented programming language that was originally created in the 1970s for educational use, specifically for constructionist learning, but later found use in business. It was created at Xerox PARC by Learning Research Group (LRG) scientists, including Alan Kay, Dan Ingalls, Adele Goldberg, Ted Kaehler, Diana Merry, and Scott Wallace.

Key facts

Programming language.name: Smalltalk
Programming language.logo: Smalltalk Balloon.svg
Programming language.logo size: 150px
Programming language.paradigm: Object-oriented
Programming language.designer: Adele Goldberg, Dan Ingalls, Alan Kay
Programming language.developer: Peter Deutsch, Adele Goldberg, Dan Ingalls, Ted Kaehler, Alan Kay, Diana Merry, Scott Wallace and Xerox PARC
Programming language.released: (development begun 1969)
Programming language.latest release version: Smalltalk-80 version 2
Programming language.typing: objects, but in some implementations, strong or dynamic
Programming language.scope: Lexical (static)
Programming language.programming language: Smalltalk
Programming language.platform: Xerox Alto (74181)
Programming language.implementations: Amber, Dolphin Smalltalk, GemStone/S, GNU Smalltalk, Pharo, Smalltalk/X, Squeak, Cuis Smalltalk, VA Smalltalk, VisualWorks
Programming language.influenced by: Lisp, Simula, Euler, IMP, Planner, Logo, Sketchpad, ARPAnet, Burroughs B5000
Programming language.influenced: AppleScript, Common Lisp Object System, Dart, Dylan, Erlang, Etoys, Go, Groovy, Io, Ioke, Java, Lasso, Logtalk, Newspeak, NewtonScript, Object REXX, Objective-C, PHP 5, Python, Raku, Ruby, Scala, Scratch, Self, Swift
Programming language.operating system: Cross-platform (multi-platform)
Programming language.wikibooks: Smalltalk
Programming language.website: hide

via Wikipedia infobox

Article

32 sections

Contents

History
Influences
Object-oriented programming
Reflection
Syntax
Literals
Variable declarations
Assignment
Messages
Expressions
Code blocks
Control structures
Classes
Methods
Instantiating classes
Integrated Development Environment
Browser
Workspace
Transcript
Inspector
Notifier/Debugger
Hello World example
Image-based persistence
Level of access
Just-in-time compilation
List of implementations
OpenSmalltalk
Others
See also
References
Further reading
External links

In Smalltalk, executing programs are built of opaque, atomic objects, which are instances of template code stored in classes. These objects intercommunicate by passing of messages, via an intermediary virtual machine environment (VM). A relatively small number of objects, called primitives, are not amenable to live redefinition, sometimes being defined independently of the Smalltalk programming environment.