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How can I use interface as a C# generic type constraint?
... @StephenHolt: I think think the creators of .NET, in deciding what constraints to allow, were focused on ones that would let generic classes and methods do things with generic types that they otherwise could not, rather than on preventing them from being used in nonsensical ways. That ...
CSS selector for first element with class
...s.
Note that in order for this to work, you will need to know in advance what the default styles will be for your other sibling elements so you can override the first rule. Additionally, since this involves overriding rules in CSS, you can't achieve the same thing with a single selector for use wi...
Clustered vs Non-Clustered
...t not unheard of. The issue with your scenario is actually the opposite of what you're assuming: you want unique values in a clustered index, not duplicates. Because the clustered index determines the physical order of the row, if the index is on a non-unique column, then the server has to add a bac...
Is R's apply family more than syntactic sugar?
...),mean))
user system elapsed
0.06 0.00 0.06
There you go. What did I win? ;-)
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...u need to reread the passage starting at the bottom of page 56 (basically, what I think you are asking for isn't type-safe without run time checks, which scala doesn't do, so you're out of luck). Translating their example to use your construct:
val x = new Slot[String]("test") // Make a slot
val y...
How to implement has_many :through relationships with Mongoid and mongodb?
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No magic. @CyrilDD, what are you referring to? map(&:physician_id) is short-hand for map{|appointment| appointment.physician.id}
– Steven Soroka
Dec 2 '14 at 3:07
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How to create a custom attribute in C#
...custom Attribute is fairly simple, it's very important that you understand what attributes are:
Attributes are metadata compiled into your program. Attributes themselves do not add any functionality to a class, property or module - just data. However, using reflection, one can leverage those attrib...
Creating a daemon in Linux
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+------+------+------+------+-----+-------+------+------+------+-----+
What you should see here is:
The daemon has no controlling terminal (TTY = ?)
The parent process ID (PPID) is 1 (The init process)
The PID != SID which means that our process is NOT the session leader
(because of the second...
Difference between git checkout --track origin/branch and git checkout -b branch origin/branch
...ation for this. setting up branch.autoSetupMerge to always simply performs what we are talking about. This setting defaults to true, which means the tracking will be performed only when checking out a remote branch. true does not setup tracking for locally created branches.
– b...
Fastest sort of fixed length 6 int array
...Overflow question ( this one ) I stumbled upon an interesting sub-problem. What is the fastest way to sort an array of 6 integers?
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