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App Inventor 2 中的“2”是什么意思？ - App Inventor 2 中文网 - 清泛网 ...
...公测，此版本也称为App Inventor 1 或 App Inventor Classic，简称AI1。
2013年12月App Inventor 2发布，简称AI2。
AI两个版本的区别：
1、功能区别：AI1官方不再开发更新，因此功能及新组件没有AI2多。
2、代码编辑器区别：AI1基于Java Web St...
How to convert C# nullable int to int
...r are all correct; I just wanted to add one more that's slightly cleaner:
v2 = v1 ?? default(int);
Any Nullable<T> is implicitly convertible to its T, PROVIDED that the entire expression being evaluated can never result in a null assignment to a ValueType. So, the null-coalescing operator ?...
Finding quaternion representing the rotation from one vector to another
...
Quaternion q;
vector a = crossproduct(v1, v2);
q.xyz = a;
q.w = sqrt((v1.Length ^ 2) * (v2.Length ^ 2)) + dotproduct(v1, v2);
Don't forget to normalize q.
Richard is right about there not being a unique rotation, but the above should give the "shortest arc," which...
App Inventor 2 创建类似于儿童模式的APP？ - App Inventor 2 中文网 - 清...
（by ChatGPT）
在MIT App Inventor（AI2）中创建类似于儿童模式的应用程序，可以限制设备上某些应用程序和功能的访问，但由于其功能有限，与Android Studio相比，这可能具有一定挑战性。然而，仍然可以使用AI2实现一定程度的应用程...
【持续更新】App Inventor 2 中文拓展一览 - App Inventor 2 中文网 - 清泛...
【持续更新】App Inventor 2 中文拓展一览ai2_extensions本文档描述您在使用App Inventor 2构建应用程序时所能用到的拓展，以打造界面更加酷炫、功能更加强大的App。更多拓展请移步至《原版最全拓展一览》。【实用小技巧】从 aia项目...
How to train an artificial neural network to play Diablo 2 using visual input?
...
I can see that you are worried about how to train the ANN, but this project hides a complexity that you might not be aware of. Object/character recognition on computer games through image processing it's a highly challenging task (not say crazy for FPS and RPG games). I ...
Parsing command-line arguments in C?
...care of stuff like, for example:
-?, --help for help message, including email address
-V, --version for version information
--usage for usage message
Doing it yourself, which I don't recommend for programs that would be given to somebody else, as there is too much that could go wrong or lower qual...
Logical operator in a handlebars.js {{#if}} conditional
...ho developed Handlebars.
Handlebars.registerHelper('ifCond', function(v1, v2, options) {
if(v1 === v2) {
return options.fn(this);
}
return options.inverse(this);
});
You can then call the helper in the template like this
{{#ifCond v1 v2}}
{{v1}} is equal to {{v2}}
{{else}}
{{v1...
Android - How to get application name? (Not package name)
...ou really use a label in android:name. If you hardcoded a string, then it fails.
– Snicolas
Aug 29 '13 at 15:20
2
...
facebook: permanent Page Access Token?
...om the Facebook docs, make a GET request to
https://graph.facebook.com/v2.10/oauth/access_token?grant_type=fb_exchange_token&client_id={app_id}&client_secret={app_secret}&fb_exchange_token={short_lived_token}
entering in your app's ID and secret and the short-lived token generated ...