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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
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Using Caps Lock as Esc in Mac OS X
...load Seil and install it:
3) After the installation you will have a new Application installed ( Mountain Lion and newer ) and if you are on an older OS you may have to check for a new System Preferences pane:
4) Check the box that says "Change Caps Lock" and enter "53" as the code for the esc...
Create request with POST, which response codes 200 or 201 and content
...2:40 GMT
Location: http://stackoverflow.com/a/36373586/12597
Content-Type: application/xml
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<questionID>1860645</questionID>
<answerID>36373586</answerID>
<primary>/a/36373586/12597</primary>
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<resour...
What parameters should I use in a Google Maps URL to go to a lat-lon?
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Is it possible to add more than one marker to an app? And if it works, how does the structure looks like?
– michael-mammut
May 12 '17 at 14:39
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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
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How can I check if an argument is defined when starting/calling a batch file?
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: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 ...
Design by contract using assertions or exceptions? [closed]
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Personally I prefer asserts for design by contract approaches. Exceptions are defensive and are doing the argument checking inside the function. Also, dbc preconditions don't say "I won't work if you use values out of the working range" but "I won't guarantee to provide the r...
Gridview height gets cut
...verticalSpacing="20dp" />
Lastly you just need to ask it to expand:
mAppsGrid = (ExpandableHeightGridView) findViewById(R.id.myId);
mAppsGrid.setExpanded(true);
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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.
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