There’s really only two possibilities: null for reference types and new myType() for value types (which corresponds to 0 for int, float, etc) So you really only need to account for two cases: object GetDefaultValue(Type t) { if (t.IsValueType) return Activator.CreateInstance(t); return null; } (Because value types always have a default constructor, that call to … Read more
Stop MySQL using the following command: sudo /etc/init.d/mysql stop Copy the existing data directory (default located in /var/lib/mysql) using the following command: sudo cp -R -p /var/lib/mysql /newpath edit the MySQL configuration file with the following command: sudo gedit /etc/mysql/my.cnf # or perhaps /etc/mysql/mysql.conf.d/mysqld.cnf Look for the entry for datadir, and change the path (which … Read more
A browser’s default styles are defined in its user agent stylesheet, the sources of which you can find here. Unfortunately, the Cascading and Inheritance level 3 spec does not appear to propose a way to reset a style property to its browser default. However there are plans to reintroduce a keyword for this in Cascading … Read more
Turns out all I needed to do was wrap the left-hand side of the expression in soft brackets: <span class=”gallery-date”>{{(gallery.date | date:’mediumDate’) || “Various”}}</span>
I would propose changing the function declaration as follows so you can do what you want: function foo($blah, $x = null, $y = null) { if (null === $x) { $x = “some value”; } if (null === $y) { $y = “some other value”; } code here! } This way, you can make a … Read more
No, they are identical. default(), for any value type (DateTime is a value type) will always call the parameterless constructor.
Windows Sublime Text 2 (Build 2181) The latest Build 2181 just added support for the -w (wait) command line argument. The following configuration will allow ST2 to work as your default git editor on Windows. This will allow git to open ST2 for commit messages and such. git config –global core.editor “‘c:/program files/sublime text 2/sublime_text.exe’ … Read more
It’s a new C++11 feature. It means that you want to use the compiler-generated version of that function, so you don’t need to specify a body. You can also use = delete to specify that you don’t want the compiler to generate that function automatically. With the introduction of move constructors and move assignment operators, … Read more
This is a bit of a grey area. You need to recall that R will always invoke a print method, and these print methods listen to some options. Including ‘scipen’ — a penalty for scientific display. From help(options): ‘scipen’: integer. A penalty to be applied when deciding to print numeric values in fixed or exponential … Read more
Switch cases should almost always have a default case. Reasons to use a default 1.To ‘catch’ an unexpected value switch(type) { case 1: //something case 2: //something else default: // unknown type! based on the language, // there should probably be some error-handling // here, maybe an exception } 2. To handle ‘default’ actions, where … Read more