大约有 33,000 项符合查询结果（耗时：0.0577秒） [XML]
Usages of Null / Nothing / Unit in Scala
...mple is this:
implicit def zeroNull[B >: Null] =
new Zero[B] { def apply = null }
Nothing is used in the definition of None
object None extends Option[Nothing]
This allows you to assign a None to any type of Option because Nothing 'extends' everything.
val x:Option[String] = None
...
Can comments be used in JSON?
...ted data element called "_comment" (or something) that would be ignored by apps that use the JSON data.
You would probably be better having the comment in the processes that generates/receives the JSON, as they are supposed to know what the JSON data will be in advance, or at least the structure of...
How to use OpenFileDialog to select a folder?
...ember as a user I was blaming these poor programmers that made yet another app with this awful tree view dialog (which is just the FolderBrowserDialog). It is completely unusable: a bunch of root dirs, a missing favorites panel, and the most horrible — you can't even paste a path there! And now as...
How to get Ruby / Homebrew / RVM to work on Yosemite?
...t permitted" because of the rootless mode. You can find a workaround here: apple.stackexchange.com/questions/196224/…
– Jorge Ortiz
Feb 16 '16 at 10:17
add a comment
...
How can I check if an argument is defined when starting/calling a batch file?
...
:end
pause
✨ other stuff..✨
■ in %~1 - the ~ removes any wrapping " or '.
■ in %~s1 - the s makes the path be DOS 8.3 naming, which is a nice trick to avoid spaces in file-name while checking stuff (and this way no need to wrap the resource with more "s.
■ the ["%~1"]==[""] "can ...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
...n HTTP handshake (a higher software level than TCP) you have to tweak your app to handle both TCP and HTTP traffic. I can't recommend a way to do this just yet.
– crockpotveggies
Nov 15 '12 at 21:20
...
Gridview height gets cut
...verticalSpacing="20dp" />
Lastly you just need to ask it to expand:
mAppsGrid = (ExpandableHeightGridView) findViewById(R.id.myId);
mAppsGrid.setExpanded(true);
share
|
improve this answer
...
What package naming convention do you use for personal/hobby projects in Java?
...main name (ie. using com.john as your package name just because your name happens to be John is not a good idea).
If you're going to give the code to anybody else, you should use a globally unique package name, which according to Java conventions means you should register and use a domain name.
...
How to use WinForms progress bar?
...ker. If you have a loop that large in your WinForm it will block and your app will look like it has hanged.
Look at BackgroundWorker.ReportProgress() to see how to report progress back to the UI thread.
For example:
private void Calculate(int i)
{
double pow = Math.Pow(i, i);
}
private void...
Static link of shared library function in gcc
...es-696714/
http://linux.derkeiler.com/Newsgroups/comp.os.linux.development.apps/2004-05/0436.html
You need the static version of the library to link it.
A shared library is actually an executable in a special format
with entry points specified (and some sticky addressing issues
included). It does no...