Take on-board some JSLint suggestions.

src/model_collection_methods.js

@@ -5,14 +5,14 @@ Model.CollectionMethods = {
     for (var i = 0; i < arguments.length; i++) {
       var model = arguments[i];
       var existing_elem = this.detect(function() {
-        return this.id() != null && this.id() == model.id();
+        return this.id() !== null && this.id() == model.id();
       });
 
       if (!existing_elem) {
         this.collection.push(model);
         added.push(model);
       }
-    };
+    }
 
     if (added.length > 0) this.trigger("add", added);
 
@@ -75,7 +75,7 @@ Model.CollectionMethods = {
       return true;
     } else {
       return false;
-    };
+    }
   },
 
   select: function(func) {
@@ -99,8 +99,8 @@ Model.CollectionMethods = {
     if (callbacks) {
       for (var i = 0; i < callbacks.length; i++) {
         callbacks[i].apply(this, data || []);
-      };
-    };
+      }
+    }
 
     return this;
   }

src/model_errors.js

@@ -18,8 +18,6 @@ Model.Errors.prototype = {
   },
 
   each: function(func) {
-    var self = this;
-
     for (var attribute in this.errors) {
       for (var i = 0; i < this.errors[attribute].length; i++) {
         func.call(this, attribute, this.errors[attribute][i]);
@@ -36,4 +34,4 @@ Model.Errors.prototype = {
     this.each(function() { count++; });
     return count;
   }
-}
+};

src/model_instance_methods.js

@@ -1,29 +1,29 @@
 Model.InstanceMethods = {
   attr: function(name, value) {
-    if (arguments.length == 0) {
+    if (arguments.length === 0) {
       // Combined attributes/changes object.
       return jQuery.extend({}, this.attributes, this.changes);
-    } else if (arguments.length == 2) {
+    } else if (arguments.length === 2) {
       // Don't write to attributes yet, store in changes for now.
       if (_.isEqual(this.attributes[name], value)) {
         // Clean up any stale changes.
         delete this.changes[name];
       } else {
         this.changes[name] = value;
-      };
+      }
       return this;
-    } else if (typeof name == "object") {
+    } else if (typeof name === "object") {
       // Mass-assign attributes.
       for (var key in name) {
         this.attr(key, name[key]);
-      };
+      }
       return this;
     } else {
       // Changes take precedent over attributes.
       return (name in this.changes) ?
         this.changes[name] :
         this.attributes[name];
-    };
+    }
   },
 
   bind: function(event, callback) {
@@ -37,11 +37,11 @@ Model.InstanceMethods = {
 
     // Automatically manage adding and removing from the model's Collection.
     var manageCollection = function() {
-      if (method == "create") {
+      if (method === "create") {
         self.constructor.add(self);
-      } else if (method == "destroy") {
+      } else if (method === "destroy") {
         self.constructor.remove(self.id());
-      };
+      }
     };
 
     // Wrap the existing callback in this function so we always manage the
@@ -60,7 +60,7 @@ Model.InstanceMethods = {
 
         // Trigger the event before executing the callback.
         self.trigger(method);
-      };
+      }
 
       // Store the return value of the callback.
       var value;
@@ -75,7 +75,7 @@ Model.InstanceMethods = {
       this.constructor.persistence[method](this, wrappedCallback);
     } else {
       wrappedCallback.call(this, true);
-    };
+    }
   },
 
   destroy: function(callback) {
@@ -93,7 +93,7 @@ Model.InstanceMethods = {
   },
 
   newRecord: function() {
-    return this.id() == null;
+    return this.id() === null;
   },
 
   reset: function() {
@@ -119,8 +119,8 @@ Model.InstanceMethods = {
     if (callbacks) {
       for (var i = 0; i < callbacks.length; i++) {
         callbacks[i].apply(this, data || []);
-      };
-    };
+      }
+    }
 
     return this;
   },
@@ -133,7 +133,7 @@ Model.InstanceMethods = {
   valid: function() {
     this.errors.clear();
     this.validate();
-    return this.errors.size() == 0;
+    return this.errors.size() === 0;
   },
 
   validate: function() {

src/model_rest_persistence.js

@@ -38,7 +38,7 @@ Model.RestPersistence = function(resource, methods) {
         return jQuery.parseJSON(xhr.responseText);
       } catch(e) {
         Model.Log(e);
-      };
+      }
     },
 
     update: function(model, callback) {
@@ -51,7 +51,7 @@ Model.RestPersistence = function(resource, methods) {
 
     xhr: function(method, url, model, callback) {
       var self = this;
-      var data = method == "DELETE" ? null : this.params(model);
+      var data = method === "DELETE" ? null : this.params(model);
 
       return jQuery.ajax({
         type: method,
@@ -66,13 +66,13 @@ Model.RestPersistence = function(resource, methods) {
 
     xhrComplete: function(xhr, textStatus, model, callback) {
       var data = this.parseResponseData(xhr);
-      var success = textStatus == "success";
+      var success = textStatus === "success";
 
       if (data) {
         if (success) {
           // Remote data is the definitive source, update model.
           model.attr(data);
-        } else if (xhr.status == 422) {
+        } else if (xhr.status === 422) {
           // Rails' preferred failed validation response code, assume these
           // are errors and replace current model errors with them.
           model.errors.clear();