In Angular 2, change detection is automatic… $scope.$watch() and $scope.$digest() R.I.P. Unfortunately, the Change Detection section of the dev guide is not written yet (there is a placeholder near the bottom of the Architecture Overview page, in section “The Other Stuff”). Here’s my understanding of how change detection works: Zone.js “monkey patches the world” — … Read more
$watch returns a deregistration function. Calling it would deregister the $watcher. var listener = $scope.$watch(“quartz”, function () {}); // … listener(); // Would clear the watch
You can set the 3rd argument of $watch to true: $scope.$watch(‘data’, function (newVal, oldVal) { /*…*/ }, true); See https://docs.angularjs.org/api/ng/type/$rootScope.Scope#$watch Since Angular 1.1.x you can also use $watchCollection to watch shallow watch (just the “first level” of) the collection. $scope.$watchCollection(‘data’, function (newVal, oldVal) { /*…*/ }); See https://docs.angularjs.org/api/ng/type/$rootScope.Scope#$watchCollection
fswatch fswatch is a small program using the Mac OS X FSEvents API to monitor a directory. When an event about any change to that directory is received, the specified shell command is executed by /bin/bash If you’re on GNU/Linux, inotifywatch (part of the inotify-tools package on most distributions) provides similar functionality. Update: fswatch can … Read more
Did you try using Watchdog? Python API library and shell utilities to monitor file system events. Directory monitoring made easy with A cross-platform API. A shell tool to run commands in response to directory changes. Get started quickly with a simple example in Quickstart…
With Homebrew installed: brew install watch
You can always use the good old observer pattern if you want to avoid the tyranny and overhead of $watch. In the service: factory(‘aService’, function() { var observerCallbacks = []; //register an observer this.registerObserverCallback = function(callback){ observerCallbacks.push(callback); }; //call this when you know ‘foo’ has been changed var notifyObservers = function(){ angular.forEach(observerCallbacks, function(callback){ callback(); }); … Read more