Interesting! An OPS5 parser would be a plus. Defining the rules with the JS API is a rather heavy.
Did the monkey eat all the bananas? I did not see them :-) Bruno On Tuesday, March 6, 2012 10:30:04 PM UTC+1, Douglas Martin wrote: > > Hi Everyone, > > Today I released v0.0.1 of nools <https://github.com/doug-martin/nools>, > a rules engine for node. I currently working on more documentation but any > feedback would be greatly appreciated! > > Here is an example of using nools to calculate fibonacci numbers. > > "use strict"; > > var nools = require("../index"); > > var Fibonacci = function (sequence, value) { > this.sequence = sequence; > this.value = value || -1; > }; > > var Result = function (result) { > this.result = result || -1; > }; > > > var flow = nools.flow("Fibonacci Flow", function (flow) { > > flow.rule("Recurse", {priority:1}, [ > ["not", Fibonacci, "f", "f.sequence == 1"], > [Fibonacci, "f1", "f1.sequence != 1"] > ], function (facts) { > var f2 = new Fibonacci(facts.f1.sequence - 1); > this.assert(f2); > }); > > flow.rule("Bootstrap", [ > Fibonacci, "f", "f.value == -1 && (f.sequence == 1 || f.sequence > == 2)" > ], function (facts) { > var f = facts.f; > f.value = 1; > this.modify(f); > }); > > flow.rule("Calculate", [ > [Fibonacci, "f1", "f1.value != -1", {sequence:"s1"}], > [Fibonacci, "f2", "f2.value != -1 && f2.sequence == s1 + 1", > {sequence:"s2"}], > [Fibonacci, "f3", "f3.value == -1 && f3.sequence == s2 + 1"], > [Result, "r"] > ], function (facts) { > var f3 = facts.f3, f1 = facts.f1, f2 = facts.f2; > var v = f3.value = f1.value + facts.f2.value; > facts.r.result = v; > this.modify(f3); > this.retract(f1); > }); > }); > > var r1 = new Result(), > session1 = flow.getSession(new Fibonacci(10), r1), > s1 = new Date; > session1.match().then(function () { > console.log("%d [%dms]", r1.result, new Date - s1); > session1.dispose(); > }); > > var r2 = new Result(), > session2 = flow.getSession(new Fibonacci(150), r2), > s2 = new Date; > session2.match().then(function () { > console.log("%d [%dms]", r2.result, new Date - s2); > session2.dispose(); > }); > > var r3 = new Result(), > session3 = flow.getSession(new Fibonacci(1000), r3), > s3 = new Date; > session3.match().then(function () { > console.log("%d [%dms]", r3.result, new Date - s3); > session3.dispose(); > }); > > And of course its on npm > > npm install nools > > -Doug > > -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
