It absorbed lessons from many sources along the way. The Unix philosophy is not a formal design method. The Unix philosophy like successful folk traditions in other engineering disciplines is bottom-up, not top-down. It is pragmatic and grounded in experience.
The Lush interpreter is written in C and features all the usual functionalities and constructs found in every decent object-oriented programming language such as conditional statements, loops, local variables, functions, macros, objects, classes, methods, and inheritance, but it also provides a large number of functions for manipulating lists, strings, vectors, matrices, and tensors.
String functions include such things as regular expression matching and substitutions. This shows a simple lunar lander game that uses the SDL library and the sprite class.
The whole game fits in 60 lines of Lush. It is significantly simpler than "Common Lisp" and quite different from Scheme. En even more unusual feature is the ability to intermix Lisp and C source code within a single function. The vector and matrix manipulation engine is quite powerful and efficient, making Lush ideal for heavy numerical applications and applications such as signal and image processing.
It includes functions to create, resize, and convert vectors, matrices, and tensors with up to eight dimensions.
It also includes basic matrix operations such as scalar operations on all elements of a matrix, dot products, outer products, transposition, highly optimized 1D and 2D convolutions. Lush is an object-oriented language.
Classes with slots and methods can be defined and compiled. Lush includes all the functions familiar to Lisp aficionados, such as list functions, list iterators, physical list manipulation, macros, splicing macros, symbol manipulation, etc, but most casual users will probably prefer to stay away from those.
Lush provides a set of simple-to-use low-level graphic functions to draw lines, polygons, rectangles, pictures, and text in color, with automatic refresh and double-buffering capability for simple animations.
Graphics can be drawn in an X-windows window on Unixor sent to a PostScript file. Ogre is entirely written in Lisp on top of the low-level graphic functions mentioned above. It contains predefined classes for buttons, sliders, radio buttons, menus, string editors, etc Ogre includes an automatic mechanism for placing objects in the window, thereby greatly simplifying the design and implementation of GUIs.
Simple GUIs can be written in extremely short times and are very compact. A very unique feature is that there is no need to call an "event main loop": It includes such goodies as pipes and sockets. Large matrices can be mapped in the virtual addressing space, instead of explicitely loaded in memory.
This allows to access very large datasets efficiently. The right pane shows an example of function that integrates Lush and C in the same source. The C segment shown in green is delimited by the hash-brace characters.
Lisp variables can be refered to from the C by prepending a dollar sign. Click on the picture for a full page screenshot.Introduction Many names have been applied to the work that has culminated in the Single UNIX Specification and its attendant X/Open UNIX brand.
Building your own UNIX shell in parts. This post explains how to execute commands. Frequently Asked Questions. Overview. What is Pushover and how do I use it? How much does Pushover cost? Can I integrate Pushover into my own iOS/Android app or website?
The pfmlures.com() method spawns the child process asynchronously, without blocking the pfmlures.com event loop. The pfmlures.comync() function provides equivalent functionality in a synchronous manner that blocks the event loop until the spawned process either exits or is terminated.
For. This is the Unix philosophy: Write programs that do one thing and do it well.
Write programs to work together. Write programs to handle text streams, because that is a universal interface. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site.