Support many Array methods on List and Results

Resolves #18

examples/ReactExample/components/todo-list-item.js

@@ -40,7 +40,7 @@ export default class TodoListItem extends React.Component {
 
     get done() {
         let items = this.props.item.items;
-        return items.length > 0 && Array.prototype.every.call(items, (item) => item.done);
+        return items.length > 0 && items.every((item) => item.done);
     }
 
     get text() {

lib/index.js

@@ -18,12 +18,44 @@
 
 'use strict';
 
+var realmConstructor;
+
 if (typeof Realm != 'undefined') {
     // The global Realm constructor should be available on device (using JavaScriptCore).
-    module.exports = Realm;  // eslint-disable-line no-undef
-} else if (navigator.userAgent) {
+    realmConstructor = Realm;  // eslint-disable-line no-undef
+} else if (typeof navigator != 'undefined' && navigator.userAgent) { // eslint-disable-line no-undef
     // The userAgent will be defined when running in a browser (such as Chrome debugging mode).
-    module.exports = require('./browser').default; // (exported as ES6 module)
+    realmConstructor = require('./browser').default; // (exported as ES6 module)
 } else {
     throw new Error('Missing Realm constructor - please ensure RealmReact framework is included!');
 }
+
+var arrayPrototype = Array.prototype;
+var arrayMethods = {};
+
+[
+    'join',
+    'slice',
+    'forEach',
+    'every',
+    'some',
+    'find',
+    'findIndex',
+    'map',
+    'reduce',
+    'reduceRight',
+    'entries',
+    'keys',
+    'values',
+].forEach(function(methodName) {
+    var method = arrayPrototype[methodName];
+    if (method) {
+        arrayMethods[methodName] = {value: method};
+    }
+});
+
+// Add the specified Array methods to the prototype of List and Results.
+Object.defineProperties(realmConstructor.List.prototype, arrayMethods);
+Object.defineProperties(realmConstructor.Results.prototype, arrayMethods);
+
+module.exports = realmConstructor;

tests/js/list-tests.js

@@ -511,7 +511,7 @@ module.exports = BaseTest.extend({
         });
 
         var names = function(results, prop) {
-            return Array.prototype.map.call(results, function(object) {
+            return results.map(function(object) {
                 return object.name;
             });
         };
@@ -522,4 +522,54 @@ module.exports = BaseTest.extend({
         objects = list.sorted(['age', 'name']);
         TestCase.assertArraysEqual(names(objects), ['Ari', 'Tim', 'Alex', 'Bjarne']);
     },
+
+    testArrayMethods: function() {
+        var realm = new Realm({schema: [schemas.PersonObject, schemas.PersonList]});
+        var object;
+
+        realm.write(function() {
+            object = realm.create('PersonList', {list: [
+                {name: 'Ari', age: 10},
+                {name: 'Tim', age: 11},
+                {name: 'Bjarne', age: 12},
+            ]});
+        });
+
+        [
+            object.list,
+            realm.objects('PersonObject'),
+        ].forEach(function(list) {
+            TestCase.assertEqual(list.slice().length, 3);
+            TestCase.assertEqual(list.slice(-1).length, 1);
+            TestCase.assertEqual(list.slice(-1)[0].age, 12);
+            TestCase.assertEqual(list.slice(1, 3).length, 2);
+            TestCase.assertEqual(list.slice(1, 3)[1].age, 12);
+
+            TestCase.assertEqual(list.join(' '), 'Ari Tim Bjarne');
+
+            var count = 0;
+            list.forEach(function(p, i) {
+                TestCase.assertEqual(p.name, list[i].name);
+                count++;
+            });
+            TestCase.assertEqual(count, list.length);
+
+            TestCase.assertArraysEqual(list.map(function(p) {return p.age}), [10, 11, 12]);
+            TestCase.assertTrue(list.some(function(p) {return p.age > 10}));
+            TestCase.assertTrue(list.every(function(p) {return p.age > 0}));
+
+            var person = list.find(function(p) {return p.name == 'Tim'});
+            TestCase.assertEqual(person.name, 'Tim');
+
+            var index = list.findIndex(function(p) {return p.name == 'Tim'});
+            TestCase.assertEqual(index, 1);
+
+            TestCase.assertEqual(list.reduce(function(n, p) {return n + p.age}, 0), 33);
+            TestCase.assertEqual(list.reduceRight(function(n, p) {return n + p.age}, 0), 33);
+
+            TestCase.assertEqual(list.entries().next().value[1].name, 'Ari');
+            TestCase.assertEqual(list.keys().next().value, 0);
+            TestCase.assertEqual(list.values().next().value.name, 'Ari');
+        });
+    },
 });

tests/js/query-tests.js

@@ -97,8 +97,8 @@ function runQuerySuite(suite) {
                 throw "Primary key required for object comparison";
             }
 
-            TestCase.assertArraysEqual(test[1], Array.prototype.map.call(results,  function(el) { 
-                return el[primary] 
+            TestCase.assertArraysEqual(test[1], results.map(function(el) {
+                return el[primary];
             }));
         }
         else if (test[0] == "QueryThrows") {

tests/js/results-tests.js

@@ -180,7 +180,7 @@ module.exports = BaseTest.extend({
         });
 
         var primaries = function(results, prop) {
-            return Array.prototype.map.call(results, function(object) {
+            return results.map(function(object) {
                 return object.primaryCol;
             });
         };

tests/js/schemas.js

@@ -39,6 +39,9 @@ PersonObject.schema = {
 PersonObject.prototype.description = function() {
     return this.name + ' ' + this.age;
 };
+PersonObject.prototype.toString = function() {
+    return this.name;
+};
 exports.PersonObject = PersonObject;
 
 exports.PersonList = {