OpenSmalltalk-VM is a virtual machine (VM) for languages in the Smalltalk family (eg
Squeak, Pharo) which is itself written in a subset of Smalltalk that can easily be translated to …

An important prerequisite for successful usage of computer systems and other interactive
technology is a basic understanding of the symbols and interaction patterns used in them …

Predefined composite operations are handy for efficient modeling, eg, for the automatic
execution of refactorings, and for the introduction of patterns in existing models. Some …

What are the ingredients of robust, elegant, flexible, and maintainable software architecture?
Beautiful Architecture answers this question through a collection of intriguing essays from …

Traits have been designed as units for fine-grained reuse of behavior in the object-oriented
paradigm. Records have been devised to complement traits for fine-grained reuse of state …

Bootstrap** is a technique commonly known by its usage in language definition by the
introduction of a compiler written in the same language it compiles. This process is important …

The dominance of computer technology in work and leisure poses challenges for older
people. Their lack of computer experience and computer literacy impedes their ability to …

Most languages fall into one of two camps: either they adopt a unique, static type system, or
they abandon static type-checks for run-time checks. Pluggable types blur this division by (i) …

Some programming languages, especially dynamic programming languages, offer suitable
mechanisms for the construction of internal domain-specific languages (DSL). Internal DSLs …

Recent years saw the development of a composition mechanism called traits. Traits are pure
units of behavior that can be composed to form classes or other traits. The trait composition …