updated simple example. added examples to package.json

example.js

@@ -1,5 +1,6 @@
 import { Population } from "./src/Population";
 import { Individual } from "./src/Individual";
+import { arity, choose } from "./src/PhenotypeHelpers";
 
 let target = "It works!";
 let population = new Population({
@@ -14,26 +15,31 @@ let population = new Population({
             // Let the individuals choose their own mutation rate on initialization.
             //rate: g => g
             // We're making it a little easier to hit lower numbers.
-            rate: g => Math.tan(Math.PI / 4 * g)
+            //rate: g => Math.tan(Math.PI / 4 * g)
+            rate: g => (g * 0.06) + 0.02
           }
         }
       ],
-      value: function(a, b, c, d, e, f, g, h, i) {
+      // The arity function returns a function of a given length.
+      // That length is used to populate the genome.
+      string: arity(target.length, function() {
+        // Encode each gene into a valid character code.
         var codes = Array.from(arguments).map(arg => {
           return 32 + Math.floor(arg * (126 - 32));
         });
+        // Convert the character codes into a string.
         var string = String.fromCharCode(...codes);
         return string;
-      }
+      })
     }
   }),
-  individuals: 50
+  individuals: 25
 });
 
 Population.Fitness["fitness"] = individual => {
   // Give the individual an error point every time they don't match the target string.
   return Array.from(target).reduce(
-    (n, v, i) => (v === individual.traits.value[i] ? n : n + 1),
+    (n, v, i) => (v === individual.traits.string[i] ? n : n + 1),
     0
   );
 };
@@ -50,7 +56,7 @@ for (let i = 0; i < 500; i++) {
   console.log(
     sorted
       .map(i => Population.Fitness.fitness(population.individuals[i]))
-      .join("")
+      .join(""), population.individuals[mostFit[0]].traits.string
   );
   // Crossover all the individuals with the most fit.
   population.operation("crossoverAndReplace", [true, mostFit]);

package.json

@@ -9,6 +9,9 @@
     "compile": "babel -d dist/ src/",
     "prepublishOnly": "npm run compile",
     "test": "mocha --compilers js:babel-core/register",
+    "example": "babel-node example.js",
+    "example:encode-word": "babel-node example.js",
+    "example:tic-tac-toe": "babel-node example-tictactoe.js",
     "test:tap": "npm run test -- --reporter=TAP",
     "test:examples": "mocha --compilers js:babel-core/register --require jsdoctest src/index.js",
     "docs:generate": "node_modules/.bin/jsdoc -c jsdoc.json"