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How do I compile and run a program in Java on my Mac?
...ional Java runtime and development environment out-of-the-box with OSX, so all you have to do is write a Java program and use the built-in tools to compile and run it.
Writing Your First Program
The first step is writing a simple Java program. Open up a text editor (the built-in TextEdit app works...
Postgres: INSERT if does not exist already
... if one modifies the table such that more columns are unique. In that case all the scripts must be modified. It would be nice if there was a more generic way to do this...
– Willem Van Onsem
Aug 1 '14 at 13:17
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Git blame — prior commits?
...he other answer), it is a better way of this solution, as you won't potentially misblame the other lines.
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How to prevent the activity from loading twice on pressing the button
... will even handle Button Selected States for you (if you provide them) and all the Material Design “goodies” you’d expect from a simple standard Widget. I can’t believe people use timers for this. Then you start seeing strange libraries to handle things like these…
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How to get controls in WPF to fill available space?
Some WPF controls (like the Button ) seem to happily consume all the available space in its' container if you don't specify the height it is to have.
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When to use generic methods and when to use wild-card?
...eed such kind of relation, then you are free not to use type parameters at all.
Some other difference between using wildcards and type parameters are:
If you have only one parameterized type argument, then you can use wildcard, although type parameter will also work.
Type parameters support multi...
Programmatically get the version number of a DLL
Is it possible to get the version number programmatically from any .NET DLL?
10 Answers
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How to make input type= file Should accept only pdf and xls
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You could do so by using the attribute accept and adding allowed mime-types to it. But not all browsers do respect that attribute and it could easily be removed via some code inspector. So in either case you need to check the file type on the server side (your second question).
Ex...
Is there a way to make AngularJS load partials in the beginning and not at when needed?
...cs.angularjs.org/api/ng.directive:script) to put your partials in the initially loaded HTML
You could also fill in $templateCache (http://docs.angularjs.org/api/ng.$templateCache) from JavaScript if needed (possibly based on result of $http call)
If you would like to use method (2) to fill in $tem...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...RACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor ...