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How to push new branch without history
...n <new_branch>
Create a new orphan branch, named <new_branch>, started from <start_point> and switch to it. The first commit made on this new branch will have no parents and it will be the root of a new history totally disconnected from all the other branches and commits.
The index...
When does System.gc() do something?
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The Java Language Specification does not guarantee that the JVM will start a GC when you call System.gc(). This is the reason of this "may or may not decide to do a GC at that point".
Now, if you look at OpenJDK source code, which is the backbone of Oracle JVM, you will see that a call to Sys...
How to set NODE_ENV to production/development in OS X
...
in package.json:
{
...
"scripts": {
"start": "NODE_ENV=production node ./app"
}
...
}
then run in terminal:
npm start
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How to disable an Android button?
...s because AS/IDEA code completion doesn't suggest android:enabled when you start to type it. (Even to this day.)
– Kevin Krumwiede
Aug 5 '18 at 18:36
2
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When to use Task.Delay, when to use Thread.Sleep?
... you want to run some code before the delay:
var sw = new Stopwatch();
sw.Start();
Task delay = Task.Delay(5000);
Console.WriteLine("async: Running for {0} seconds", sw.Elapsed.TotalSeconds);
await delay;
Guess what this will print? Running for 0.0070048 seconds.
If we move the await delay above ...
Find the day of a week
...way...
The wday component of a POSIXlt object is the numeric weekday (0-6 starting on Sunday).
as.POSIXlt(df$date)$wday
## [1] 3 3 4
which you could use to subset a character vector of weekday names
c("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
"Friday", "Saturday")[as.POSIXlt(...
Execute another jar in a Java program
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The following works by starting the jar with a batch file, in case the program runs as a stand alone:
public static void startExtJarProgram(){
String extJar = Paths.get("C:\\absolute\\path\\to\\batchfile.bat").toString();
ProcessBu...
Remove underline from links in TextView - Android
...gth(), URLSpan.class);
for (URLSpan span: spans) {
int start = s.getSpanStart(span);
int end = s.getSpanEnd(span);
s.removeSpan(span);
span = new URLSpanNoUnderline(span.getURL());
s.setSpan(span, start, end, 0);
}
t...
Creating a new empty branch for a new project
...some documentation. For that we would want to create a new empty branch to start storing our files, and I would want other users of the network to clone that branch.
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Cannot kill Python script with Ctrl-C
...cess alive. We can make them daemons:
f = FirstThread()
f.daemon = True
f.start()
s = SecondThread()
s.daemon = True
s.start()
But then there's another problem - once the main thread has started your threads, there's nothing else for it to do. So it exits, and the threads are destroyed instantly....