我今天看到了一个代码,它注册了一个观察者如下:
scope.$watch(function() { //some code which is not relevant in current context });
角文档将$watch方法指定为
$watch(watchExpression, listener, [objectEquality]);
那么,在没有听者的情况下,观察者的用法是什么呢?
提前感谢
新手,我读了的文件。$watch的语法是
$watch(watchExpression, [listener], [objectEquality], [deregisterNotifier]);
但我看到的例子如下所示。
var food;
scope.foodCounter = 0;
expect(scope.foodCounter).toEqual(0);
scope.$watch(
// This is the listener function
function() { return food; },
// This is the change handler
function
https://stackoverflow.com/a/63800832/1497720
典型的监视语法是watch(<variable>, <function to handle>),但在以下答案中:
我们有
watch(() => route.name, () => {
console.debug(`MyCoolComponent - watch route.name changed to ${route.name}`);
// Do something here...
// Optionally you can set immediate
我正在尝试按照下面的说明安装入口控制器:
运行helm install stable/nginx-ingress --namespace kube-system --set controller.replicaCount=1 --tls会导致以下错误:
Error: release unrealized-labradoodle failed: clusterroles.rbac.authorization.k8s.io "unrealized-labradoodle-nginx-ingress" is forbidden: attempt to grant extra pri
我想看所有的东西,但是我的目录中的.min.ext文件有gulp.js。过滤掉这些的最好方法是什么?
示例:
gulp.task('watch', function(e) {
gulp.watch('./js/*.js', ['css']); // don't want to watch .min.js files. what is best way?
});
编辑:如果没有外部包是无法完成的,那么哪一个是最有名的?
当Gulp Watch只处理已修改的文件时,我遇到了问题 当我开始时,Gulp会正确地执行任务,但当我进行更改时,Gulp watch会再次执行所有任务,而不仅仅是那些更改过的任务。我不知道是什么问题,你能帮我吗? // Watch Task: watch SCSS and JS files for changes
// If any change, run scss and js tasks simultaneously
function watchTask() {
watch([files.htmlPath, files.scssPath, files.mincssPath,
说我有个密码:
public void StartThreadWatch()
{
EventQuery query = new EventQuery
("SELECT * FROM _InstanceCreationEvent WITHIN 1 " +
"WHERE TargetInstance ISA 'Win32_Process'";
ManagementEventWatcher watcher =
new ManagementEventWatch(query);
watch.E
在Ubuntu14.04下运行一些旧的Python+GTK3代码时,出现了以下弃用警告:
PyGIDeprecationWarning: io_add_watch is deprecated; use GLib.io_add_watch instead
/usr/lib/python3/dist-packages/gi/overrides/GLib.py:655: PyGIDeprecationWarning: Calling io_add_watch without priority as second argument is deprecated
/usr/lib/python3/dist