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Async Image Loader Extension：异步图像加载器扩展 - App Inventor 2 拓展...
...ods. LoadImageAsync[size=15.008px][size=15.008px]Load image asynchronously from the given path in the specified component.[size=15.008px]
ParameterType
imagePathtext
componentcomponent
ClearCache[size=15.008px][size=15.008px]Clears the image cache memory.Designer:[size=15.008px]AsyncImage has t...
WheelView：滚轮选择框扩展 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
WheelView, like number picker, but can be any strings.original code from WheelView: 效果类似android4.0以上原生的DatePicker 18Thanks @wildcontrol to sponsor this extensionDemo picture:this demo used 3 extensionsAll the blocks
来源：https://wangsk789.github.io/wheelview/
更多滚轮拓...
How to identify CAAnimation within the animationDidStop delegate?
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To make explicit what's implied from above (and what brought me here after a few wasted hours): don't expect to see the original animation object that you allocated passed back to you by
- (void)animationDidStop:(CAAnimation*)animation finished:(BOOL)flag...
Is there a simple, elegant way to define singletons? [duplicate]
...nly the `self` argument. Also, the decorated class cannot be
inherited from. Other than that, there are no restrictions that apply
to the decorated class.
To get the singleton instance, use the `instance` method. Trying
to use `__call__` will result in a `TypeError` being raised.
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JUnit Testing Exceptions [duplicate]
...t the exception?
for newer junit (>= 4.7), you can use something like (from here)
@Rule
public ExpectedException exception = ExpectedException.none();
@Test
public void testRodneCisloRok(){
exception.expect(IllegalArgumentException.class);
exception.expectMessage("error1");
new Rod...
Is there a method to generate a UUID with go language
...rectly identify it as version 4. This is done to distinguish random UUIDs from ones generated via other algorithms (e.g. version 1 UUIDs based on your MAC address and time).
share
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improve this an...
How to detect orientation change?
...e additional correct code because the compiler will no longer try infer it from your usage. Hence, if you add "@obj" to your rotate() func in your Swift 3.0 solution, the code will compile without the warning.
– Mythlandia
Jul 22 '18 at 6:20
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Constructors in Go
...struct a sensible default. (While this looks strange to most people coming from "traditional" oop it often works and is really convenient).
Provide a function func New() YourTyp or if you have several such types in your package functions func NewYourType1() YourType1 and so on.
Document if a zero ...
Regular expression to match a line that doesn't contain a word
...de the end anchor into the search string: change the string to "not match" from "hede" to "hede$"
– Nyerguds
May 4 '16 at 10:42
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What's an appropriate HTTP status code to return by a REST API service for a validation failure?
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From RFC 4918 (and also documented at http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml):
The 422 (Unprocessable Entity) status code means the server
understands the content type of the request...