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IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
...
Somehow the JDK language jars were removed from the classpath. All I had to do was reapply the JSDK home path.
Goto:
File -> Project Structure -> Platform Settings -> SDKs
Re-apply the JSDK home path.
Doing this added about 15 jars to the classpath. Apparently these are impo...
How to TryParse for Enum value?
....Val1|MyEnum.Val2" which is a combination of two enum values. If you just call Enum.IsDefined with this string, it will return false, even though Enum.Parse handles it correctly.
Update
As mentioned by Lisa and Christian in the comments, Enum.TryParse is now available for C# in .NET4 and up.
MSDN...
nodejs get file name from absolute path?
... extension from filename, you can use
https://nodejs.org/api/path.html#path_path_basename_path_ext
path.basename('/foo/bar/baz/asdf/quux.html', '.html');
share
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improve this answer
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Socket客户端使用指导 · App Inventor 2 中文网
...务器必须接受原始 TCP，不能填 WebSocket 网址。
when 按钮_连接.Click() {
Socket客户端1.Connect()
}
when 按钮_断开.Click() {
Socket客户端1.Disconnect()
}
when Socket客户端1.Disconnected() {
标签1.Text = "连接已断开"
}
TCP 接收块不保证恰好是一条...
App Inventor 2 SideBarV2 侧边栏拓展 · App Inventor 2 中文网
...用 Show 和 Hide 控制显示：
when Screen1.Initialize() {
SidebarV2_1.Create(
垂直布局_内容,
["首页", "消息", "设置"],
["home", "message", "settings"],
"sidebar_background.png")
}
when 按钮_菜单.Click() {
SidebarV2_1.Show()
}
when SidebarV2_1.AfterSelecting...
How to correctly implement custom iterators and const_iterators?
...e, std::iterator with random_access_iterator_tag.These base classes define all type definitions required by STL and do other work.
To avoid code duplication iterator class should be a template class and be parametrized by "value type", "pointer type", "reference type" or all of them (depends on impl...
sed one-liner to convert all uppercase to lowercase?
I have a textfile in which some words are printed in ALL CAPS. I want to be able to just convert everything in the textfile to lowercase, using sed . That means that the first sentence would then read, 'i have a textfile in which some words are printed in all caps.'
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How to sign an android apk file
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https://developer.android.com/studio/publish/app-signing.html
Okay, a small overview without reference or eclipse around, so leave some space for errors, but it works like this
Open your project in eclipse
Press right-mouse - > tools (android tools?) - > export signed application (apk?)
G...
How to write log to file
... answered Nov 13 '13 at 22:56
Allison AAllison A
4,62966 gold badges2525 silver badges3232 bronze badges
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App Inventor 2 手势识别扩展教程 - GestureDetector · App Inventor 2 中文网
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when GestureDetector1.DoubleTapAtPoint(X, Y) {
// 双击触发
标签_状态.Text = join("双击 @ ", X, ",", Y)
}
when GestureDetector1.LongClick(X, Y) {
// 长按触发
标签_状态.Text = join("长按 @ ", X, ",", Y)
}
when GestureDetector1.ThumbEnabled(起点X, 起点Y, 终点X, 终...