lazy-loading

I'm upgrading from Angular 4.0.0 to Angular 5.2.6 i'm facing some problem to get lazy module loading working. with angular 4.0.0 , it works fine , but now , with 5.2.6 , i getting such an error when clicking my redirecting button : core.js:1448 ERROR Error: Uncaught (in promise): TypeError: undefined is not a function TypeError: undefined is not a function at Array.map (<anonymous>) at webpackAsyncContext (eval at ./src/$$_lazy_route_resource lazy recursive (main.bundle.js:27), <anonymous>:13:34) at SystemJsNgModuleLoader.loadAndCompile (core.js:6558) at SystemJsNgModuleLoader.load (core.js

I'm trying to find a way to lazily load a module-level variable. Specifically, I've written a tiny Python library to talk to iTunes, and I want to have a DOWNLOAD_FOLDER_PATH module variable. Unfortunately, iTunes won't tell you where its download folder is, so I've written a function that grabs the filepath of a few podcast tracks and climbs back up the directory tree until it finds the "Downloads" directory. This takes a second or two, so I'd like to have it evaluated lazily, rather than at module import time. Is there any way to lazily assign a module variable when it's first accessed or

I am using SDWebImage library to load remote images into a table view which uses a custom cell class i have created. I simply use [cell.imageView setImageWithURL:url placeholderImage:[UIImage imageNamed:@"loading.jpg"]]; in cellForRowAtIndexPath: Now the problem is it loads images in the visible cells only and not for cells that are offscreen for which i have to scroll up and down to make them load. Is there any way i can load all images without having to scroll the table view. Thanks in advance!! If you want to prefetch rows, you can respond to UIScrollViewDelegate methods to determine when

My scenario is as follows. I have a menu, with multiple options. Each menu should be shown depending on user permissions (already solved), most menu items are encapsulated as modules, and most of the modules are lazy loaded, so when a user clicks a menu item the first time, it loads (up to here everything works well), now my requirement is, in order to give a better user experience, I need to show activity indicator after user clicks a menu item while the lazy loaded module is loading. Up to this, I tried using canActive, canLoad, canActivateChild interfaces from Angular Router but with no

I just noticed that static members of Swift structs are implicitly lazy . For instance, this will only call the init once: class Baz { init(){ print("initializing a Baz") } } struct Foo { static let bar = Baz() } var z = Foo.bar z = Foo.bar What's the rationale behind this? What if I want the opposite behaviour? The static property defines a "type property", one that is instantiated once and only once. As you note, this happens lazily, as statics behave like globals. And as The Swift Programming Language: Properties says: Global constants and variables are always computed lazily, in a similar

I tend to use Hibernate in combination with Spring framework and it's declarative transaction demarcation capabilities (e.g., @Transactional ). As we all known, hibernate tries to be as non-invasive and as transparent as possible, however this proves a bit more challenging when employing lazy-loaded relationships. I see a number of design alternatives with different levels of transparency. Make relationships not lazy-loaded (e.g., fetchType=FetchType.EAGER) This vioalites the entire idea of lazy loading .. Initialize collections using Hibernate.initialize(proxyObj); This implies relatively