![]() ![]() execute(): Executes a function taking a variable number of LispObjects as arguments.getSymbolFunction(): Returns the function for a corresponding symbol.findAccessibleSymbol(String symbolName): Finds a symbol such as that for a function.findPackage(String packageName): Finds a Lisp package.Often used with load to load a Lisp file. eval(String expression): Evaluates a Lisp expression.createInstance(): Creates a Lisp interpreter.Can unbox LispObjects to Java primitives with methods such as intValue() which returns (surprise!) an int.Īll the classes below are in the package:.Can also unbox Cons objects into arrays, if you wish by using the copyToArray() method which returns LispObject.Has car() and cdr() methods if you want to write Java code in a Lisp style.Type the following at the command line (adjust the path as necessary):Ĭ:\abcl-src-0.15.0\dist>java -jar abcl.jar.You will need to add abcl.jar to your class path for ABCL projects.In the end, you will end up with a file called.Go to the ABCL page and find the download link.Therefore: Write great applications using Java for your front-end GUI backed with Lisp code and get the best of both worlds.Lisp is the world's greatest programming language Basically this means you can use ABCL from your application without the need to make your own application open source.īut it's not the world's greatest programming language.ABCL is distributed under the GNU General Public License with Classpath exception.Supports interoperability both ways between Java and Lisp.Watch Math Brown demonstrate how to interact with our implementation of Conway's Game of Life in the video below.Armed Bear Common Lisp (ABCL) - User Documentation "It's the right to arm bears" Paul Westerberg Overview And other times, all cells will quickly die off or stabilise into a static formation, known as a still life, such as a 2x2 square. Other times, it will create a repeating sequence (such as the glider, pulsar, and spaceship from the preset dropdown). Sometimes an initial state will create an unpredictable, chaotic sequence. Those 4 seemingly simple rules can result in wildy differing sequences. If a cell is dead and it has exactly 3 neighbours it becomes alive again.If a cell is alive and it has fewer than 2 alive neighbours, it dies of loneliness.If a cell is alive and it has more than 3 alive neighbours, it dies of overcrowding.If a cell is alive, and 2 or 3 of it's neighbours are also alive, the cell remains alive.A cell's fate depends on the state of its 8 closest neighbours (our grid utilises wrapping, meaning a cell on the far left is thought of as a neighbour of a cell on the far right, and the same principle applies at the top and bottom). The game is now ready to begin, and this involves advancing through time one step at a time. You can do this in the above example by clicking on squares, or by picking a preset from the dropdown menu. Before you start the game, you need to provide an initial state. A cell can either be dead or alive (alive cells are coloured blue in our demo). The rules are as follows:Įach cell lives in a square in a rectangular grid. Conway's Game of Life is a game invented by mathematician John Conway in 1970. ![]()
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