Everything is an object. Objects collaborate by exchanging messages to achieve the desired application behavior. The Smalltalk programming language has a concise syntax and simple execution semantics. The Smalltalk system is implemented in itself, the compiler, debugger, programming tools and so on being Smalltalk code the user can read and modify. Novice programmers can get started easily and experts can engineer elegant solutions at large.
All graphical objects are tangible and interactively changeable. This promotes short feedback loops and low-effort application development. Morphic thus leverages the live programming experience of traditional Smalltalk environments from a mainly text-focused domain to a graphical one.
The dynamic Squeak environment provides a variety of tools for browsing, writing, executing, and versioning Smalltalk code. Multiple debugging sessions can be served concurrently. Thanks to Morphic, tool customization can be achieved with reasonable effort.
There are several fast Squeak VMs that also support other languages of the Smalltalk family. Meta-tracing, just-in-time compilation, stack-to-register mapping, and aggressive in-line message caching yield efficiency in executing Smalltalk byte code.
The Squeak Wiki collects useful information about the language, its tools, and several projects. It’s a wiki, so you can participate!
A media-rich authoring environment with a simple, powerful scripted object model for many kinds of objects created by end-users that runs on many platforms.
Andrew Black, Stéphane Ducasse, Oscar Nierstrasz, Damien Pollet, Damien Cassou, and Marcus Denker. Square Bracket Associates, 2007.
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