I'm new to Node.js and finally making some headway before running into
module.exports
I wanted to separate some code out into an external file, so I created the
file and called it probability.js
The problem I ran into was having to define the function getRandomInt twice
to allow it to be called by the Die methods and by the primary server code.
I'm sure this is a scope issue, but I have not been able to figure out how
to resolve it in the proper way. Ideally, I want the getRandomInt function
defined one time within module.exports, but not part of Die or Dice objects
while still allowing the Die and Dice methods to call it. Any assistance
is appreciated.
module.exports = {
// Returns a random integer between min and max
// Using Math.round() will give you a non-uniform distribution!
getRandomInt: function(min, max) {
return Math.floor(Math.random() * (max - min + 1) + min);
},
Die: function(numSides) {
// constructor;
var sides = numSides;
var lastRoll = -1;
this.roll = function() {
console.log("sides: %d", sides);
lastRoll = getRandomInt(1, sides);
}
this.getLastRoll = function() {
return lastRoll;
}
},
Dice: function() {
var myDie = new Array();
var totalDie = 0;
this.addDie = function(newDie) {
myDie.push(newDie);
totalDie = totalDie + 1;
}
this.roll = function() {
for (i=0; i<totalDie; i++) {
myDie[i].roll();
}
}
this.getTotalRoll = function() {
var total = 0;
console.log("Get Total Roll");
for (i=0; i<totalDie; i++) {
console.log('Dice: %d = %d', i, myDie[i].getLastRoll());
total = total + myDie[i].getLastRoll();
}
return total;
}
}
};
// Returns a random integer between min and max
// Using Math.round() will give you a non-uniform distribution!
var getRandomInt = function(min, max) {
return Math.floor(Math.random() * (max - min + 1) + min);
}
// Returns a random number between 0 (inclusive) and 1 (exclusive)
var getRandom = function () {
return Math.random();
}
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