You could use a deep watcher, but a more elegant solution would be to create computed property of the data you want to watch, and watch that instead: new Vue({ el: ‘#app’, data: () => ({ forms: [{ day: ’12’, month: ‘9’, year: ‘2035’, colors: ‘lightblue’, selected: true }, { day: ’28’, month: ’01’, year: … Read more
What helped me to understand the difference between watch and watchEffect in Vue 3 was to think about watchEffect as computed with side-effects. The watchEffect() hook works like the computed() hook or the computed option, but instead of returning a value, you use it to trigger side-effects. Use watch whenever you want to trigger a … Read more
With gdb you can print std::string by below 2 methods. p mystr.c_str() -this can be used to print value of type std::string. p *(char**) 0x7f8fbb7a9c20 -this works for a memory with type std::string.
I ran into the same problem today. I my usecase a small delay before the file is actually imported was not a big problem and I still wanted to use the NIO2 API. The solution I choose was to wait until a file has not been modified for 10 seconds before performing any operations on … Read more
The $watch function is used to watch variables on the scope. Scope inheritance allows you to watch parent scope variables as well, so that is definitely the way to go for your use case. As you correctly said, $on is used to watch for events, which you can $broadcast to child scopes or $emit to … Read more
Try to write $watch by this way: myApp.controller(‘MyCtrl’, function($scope, myService) { $scope.setFTag = function() { myService.setFalseTag(); }; $scope.$watch(function () { return myService.tags; }, function(newVal, oldVal) { /*…*/ }, true); }); Demo Fiddle [EDIT] Sometimes this way will not work especially if service has been updated from 3d party. To make it work we must help … Read more
Use nodemon –legacy-watch to poll for file changes instead of listening to file system events. VirtualBox doesn’t pass file system events over the vboxfs share to your Linux VM. If you’re using Docker for Windows, it would appear HyperV doesn’t propagate file system events either. As a 2021 side note, Docker for Mac/Windows new GRPCfuse … Read more
Using classic gnu make and inotifywait, without interval-based polling: watch: while true; do \ $(MAKE) $(WATCHMAKE); \ inotifywait -qre close_write .; \ done This way make is triggered on every file write in the current directory tree. You can specify the target by running make watch WATCHMAKE=foo
I have created a small object.watch shim for this a while ago. It works in IE8, Safari, Chrome, Firefox, Opera, etc. /* * object.watch v0.0.1: Cross-browser object.watch * * By Elijah Grey, http://eligrey.com * * A shim that partially implements object.watch and object.unwatch * in browsers that have accessor support. * * Public Domain. * … Read more
$watch only evaluate string or function parameter in its first argument. Change your $watch like this : $scope.$watch(‘cart.name + cart.id + cart.amount’, $scope.updateCart()); OR $scope.$watch(‘cart’, $scope.updateCart, true); See reference API