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Why doesn't String switch statement support a null case?
...owing note:
The prohibition against using null as a switch label prevents one from writing code that can never be executed. If the switch expression is of a reference type, that is, String or a boxed primitive type or an enum type, then a run-time error will occur if the expression evaluates to nul...
What is the use of the @ symbol in PHP?
...esses errors.
See Error Control Operators in the manual:
PHP supports one error control operator: the at sign (@). When prepended to an expression in PHP, any error messages that might be generated by that expression will be ignored.
If you have set a custom error handler function with set...
How to print out the method name and line number and conditionally disable NSLog?
...y ALog+DLog code with ULog as well. Very useful.
– neoneye
Sep 15 '11 at 14:34
This code causes an unused variable err...
What is Data Transfer Object?
...fer Object is an object that is used to encapsulate data, and send it from one subsystem of an application to another.
DTOs are most commonly used by the Services layer in an N-Tier application to transfer data between itself and the UI layer. The main benefit here is that it reduces the amount of ...
Java Delegates?
...
But see my example here of what one would do, even in Java 7, to accomplish the equivalent to a C# delegate.
– ToolmakerSteve
Jun 18 '15 at 21:36
...
How to efficiently build a tree from a flat structure?
...ind a npm module which implements a O(n) solution, I created the following one (unit tested, 100% code coverage, only 0.5 kb in size and includes typings. Maybe it helps someone: npmjs.com/package/performant-array-to-tree
– Philip Stanislaus
May 7 '17 at 17:29
...
How to set warning level in CMake?
...st too many warnings to list them all explicitely. If you want to unify it one way to do thatis two separate cmake_level - unified set of warnings, based for instance on clang, and native_level with the meaning specific for a compiler. One of them can be probably shortened to level. Sorry if I did n...
Create instance of generic type in Java?
...at the answer is no ( due to type erasure ), but I'd be interested if anyone can see something I'm missing:
27 Answers
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How to do an update + join in PostgreSQL?
...ery WHERE
As you can see, original subquery JOIN's ON clause have become one of WHERE conditions, which is conjucted by AND with others, which have been moved from subquery with no changes. And there is no more need to JOIN table with itself (as it was in subquery).
...
How to set default font family for entire Android app
... from list themes.xml, then create your custom style based on the original one. At the end, apply the style as the theme of the application.
<application
android:theme="@style/AppTheme" >
</application>
It will work only with built-in fonts like Roboto, but that was the question. ...