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How to hide elements without having them take space on the page?
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Try setting display:none to hide and set display:block to show.
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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...t.edu)
Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology
77 Massachusetts Avenue, Cambridge, MA 02139, USA
ABSTRACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and bu...
How can I restart a Java application?
...n by -Djava.home.)
You would presumably want to honor the original memory settings etc (-Xmx, -Xms, …) so you need to figure out which settings where used to start the first JVM. You could try using ManagementFactory.getRuntimeMXBean().getInputArguments() but there's no guarantee that this will r...
Changing Jenkins build number
...le) and update the build number in Jenkins to match it. I have tried to set the build number:
8 Answers
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Create space at the beginning of a UITextField
...now:
Swift 4.2
class TextField: UITextField {
let padding = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
override open func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.inset(by: padding)
}
override open func placeholderRect(forBounds bounds: CGR...
Which characters need to be escaped when using Bash?
...1!s/^/"/; $!s/$/"/'.
2b. More readable version of 2
There's an easy safe set of characters, like [a-zA-Z0-9,._+:@%/-], which can be left unescaped to keep it more readable
I\'m\ a\ s@fe\ \$tring\ which\ ends\ in\ newline"
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sed command: LC_ALL=C sed -e 's/[^a-zA-Z0-9,._+@%/-]/\\&/g; 1{$s/^$...
Switch on Enum in Java [duplicate]
...a. I'm guessing you intended to say you can’t, but you can. chars have a set range of values, so it's easy to compare. Strings can be anything.
A switch statement is usually implemented as a jump table (branch table) in the underlying compilation, which is only possible with a finite set of value...
Tuples( or arrays ) as Dictionary keys in C#
...uples are not the most performant when they're meant to be used as keys in sets since its Equals and GetHashCode implementation causes boxing for value types.
I would go with tuple based dictionary, but if I want more performance, I would use my own tuple with better implementation.
On a side n...
How to return multiple values? [duplicate]
...values, then you can use Java's built-in container classes like Map, List, Set etc. Check the java.util package's JavaDoc for more details.
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smart pointers (boost) explained
What is the difference between the following set of pointers? When do you use each pointer in production code, if at all?
4...