Hola Paul, On 05.01.2011 20:51, Paul Libbrecht wrote: > I don't see why langs would have this, especially since it generally involves > variables, scopes, objects, etc. > Can you compare that to JEXL ? In comparison to JEXL i was looking for a possiblity to pass a simple math expression to an evaluator containing some simple functions from java.lang.Math like Math.sin(double x). An example taking user input like "2^log(2-3)" and evaluating the result at runtime in a java application. I did try using the Scripting engine in Java but firing it up and evaluating expressions in this way is quite slow. With an unwarmed javascript engine it took 1sec for 800 evaluations, while the evaluation using a java implementation was done in 8ms. I thought this was of interest for commons-lang because i looked in the lang.math.* package if there was an expression evaluator there.
have fun! -- *frank asseg* softwareentwicklung sebastian-kneipp-strasse 14a 79104 freiburg i. brsg. tel.: ++49-761-88790001 fax.: ++49-761-88790002 mail: frank.as...@congrace.de --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
