poisson.js

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.poisson = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){

var Process = require('./lib/Process');

// Raw sampling function
exports.sample = require('./lib/sample');

// Semantic version, useful for inspection when version is not known.
exports.version = require('./lib/version');

// .create style contstructor
exports.create = function (avgIntervalMs, triggedFn) {
  return new Process(avgIntervalMs, triggedFn);
};

},{"./lib/Process":2,"./lib/sample":3,"./lib/version":4}],2:[function(require,module,exports){
var sample = require('./sample');

var Process = function (interval, fn) {
  // Parameters:
  //   interval
  //     number of milliseconds
  if (typeof interval !== 'number') {
    throw new Error(interval + ' should be a number.');
  }
  if (typeof fn !== 'function') {
    throw new Error('Callee ' + fn + ' should be a function.');
  }
  if (interval < 0) {
    throw new Error(interval + ' should be a non-negative number.');
  }
  this.interval = interval;
  this.fn = fn;
  this.timeout = null;
};

Process.prototype.start = function () {
  var dt = sample(this.interval);
  var self = this;
  this.timeout = setTimeout(function () {
    self.start();
    self.fn();
  }, dt);
};

Process.prototype.stop = function () {
  clearTimeout(this.timeout);
};

module.exports = Process;

},{"./sample":3}],3:[function(require,module,exports){
module.exports = function (mean) {
  // Generate exponentially distributed variate.
  //
  // Inter-arrival times of events in Poisson process
  // are exponentially distributed.
  // mean = 1 / rate
  // Math.log(x) = natural logarithm of x
  return -Math.log(Math.random()) * mean;
};

},{}],4:[function(require,module,exports){
// generated by genversion
module.exports = '1.0.0';

},{}]},{},[1])(1)
});