Update: Since this answer was posted, some of the tools available have changed. After the original answer, there is an update including information on how to build the example with current tools. It isn’t quite as simple as compiling to a jar and calling the internal methods. There do seem to be a few tricks … Read more
Update Q4 2017: as commented below by vda8888, in Java 9, the System java.lang.ClassLoader is no longer a java.net.URLClassLoader. See “Java 9 Migration Guide: The Seven Most Common Challenges“ The class loading strategy that I just described is implemented in a new type and in Java 9 the application class loader is of that type. … Read more
It is possible to create a single JAR file with all dependencies including the native JNI libraries for one or more platforms. The basic mechanism is to use System.load(File) to load the library instead of the typical System.loadLibrary(String) which searches the java.library.path system property. This method makes installation much simpler as the user does not … Read more
You might like to read this paper by Richard Gabriel. It is a summary of the issues that the Lisp community were discussing in Lisp1 vs Lisp2. It’s a bit dense and slow moving in the first few sections, but is much easier to read by the time you get past section 5. Basically, Lisp1 … Read more
There are several reasons why one should not use EVAL. The main reason for beginners is: you don’t need it. Example (assuming Common Lisp): EVALuate an expression with different operators: (let ((ops ‘(+ *))) (dolist (op ops) (print (eval (list op 1 2 3))))) That’s better written as: (let ((ops ‘(+ *))) (dolist (op ops) … Read more
You can use mapcat and an inner map like this: user=> (mapcat (fn [as b] (mapv #(vector % b) as)) [[1 2] [3 4]] [5 6]) ([1 5] [2 5] [3 6] [4 6])