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App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
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DynamicComponents 拓展
.aix 拓展下载（最新版 v2.3.0）：
com.yusufcihan.DynamicComponents.aix
完全支持 App Inventor 2 的动态组件扩展。它基于 Java 的反射功能，因此只需键入类名称即可搜索类来创建组件。因此，它对特定组...
Method call if not null in C#
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Wrong as per 2015 / C# 6.0... ? is he soltion. ReferenceTHatMayBeNull?.CallMethod() will not call the method when null.
– TomTom
Jan 13 '16 at 20:17
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What's an easy way to read random line from a file in Unix command line?
...c OS sort). GNU sort learned those flags in 2005 so you need GNU coreutils 6.0 or newer (eg CentOS 6).
– RJHunter
Apr 9 '15 at 7:09
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show 3...
SSL Error: unable to get local issuer certificate
I'm having trouble configuring SSL on a Debian 6.0 32bit server. I'm relatively new with SSL so please bear with me. I'm including as much information as I can.
Note: The true domain name has been changed to protect the identity and integrity of the server.
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Case insensitive 'Contains(string)'
...p) >= 0;
}
}
Note, that null propagation ?. is available since C# 6.0 (VS 2015), for older versions use
if (source == null) return false;
return source.IndexOf(toCheck, comp) >= 0;
USAGE:
string title = "STRING";
bool contains = title.Contains("string", StringComparison.OrdinalIgno...
Javascript: negative lookbehind equivalent?
... V8
✔️ Google Chrome 62.0
✔️ Microsoft Edge 79.0
✔️ Node.js 6.0 behind a flag and 9.0 without a flag
✔️ Deno (all versions)
✔️ SpiderMonkey
✔️ Mozilla Firefox 78.0
????️ JavaScriptCore: Apple is working on it
????️ Apple Safari
????️ iOS WebView (all browsers on...
Reset Entity-Framework Migrations
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One thing to be aware of, from EF 6.0 the _MigrationsHistory table contains migrations for multiple DBContexts. Deleting it can cause issues, you should only delete the rows where ContextKey = your migration name. Also after 2 above I had to enable-migrations...
Why generate long serialVersionUID instead of a simple 1L?
...ove comment was taken from Java Object Serialization Specification version 6.0
– user624558
Sep 24 '14 at 1:38
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Tools to get a pictorial function call graph of code [closed]
... called from a function in MS VS2005 using the Object browser, and in MSVC 6.0 also, this only shows functions called from a particular function in a non-graphical kind of display. Additionally, it does not show the function called starting from say main() , and then the functions called from it, a...
“The file ”MyApp.app“ couldn't be opened because you don't have permission to view it” when running
...<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
- <string>iOS</string>
+ <string>${PRODUCT_NAME}</string>
<key>CFBundlePackageType</key>
- <strin...