new Patcher( observableOrList [, priority] )

Patcher is used to get consistent patch events from a variety of source observables. For example, a patcher can be used to get patches from changes to a can-define/list/list:

var hobbies = new DefineList(["dancin","programmin"]);

var patcher = new Patcher(hobbies);

canReflect.onPatches(patcher, console.log);

hobbies.push("foosin") // logs {
                       //   type: "splice",
                       //   index: 2,
                       //   deleteCount: 0,
                       //   insert: ["foosin"]
                       // }

Patcher can also be used to create patches from an observable as it changes from one list to another list:

var hobbies = new DefineList(["dancin","programmin"]);
var hobbiesObservable = value.fromValue(hobbies);

var patcher = new Patcher(hobbies);

canReflect.onPatches(patcher, console.log);

hobbies.push("foosin") // logs-> {
                       //   type: "splice",
                       //   index: 2,
                       //   deleteCount: 0,
                       //   insert: ["foosin"]
                       // }

hobbiesObservable.value = new DefineList(["dancin","foosin"])
// logs-> {
//   type: "splice",
//   index: 1,
//   deleteCount: 1,
//   insert: []
// }