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What is the dependency inversion principle and why is it important?
... logging facility, the way you would use it should be relatively stable in time. If you can extract an interface that represents the concept of logging, this interface should be much more stable in time than its implementation, and call sites should be much less affected by changes you could make wh...
What is a callback?
What's a callback and how is it implemented in C#?
11 Answers
11
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Close and Dispose - which to call?
... SqlConnectionObject is:
An application can call Close more
than one time. No exception is
generated.
If you called Dispose method
SqlConnection object state will be
reset. If you try to call any
method on disposed SqlConnection
object, you will receive exception.
That said:
...
Should I use document.createDocumentFragment or document.createElement
...ildren.
This allows you to insert multiple nodes into the DOM at the same time:
var frag = document.createDocumentFragment();
var textNode = frag.appendChild(document.createTextNode("Some text"));
var br = frag.appendChild(document.createElement("br"));
var body = document.body;
body.appendChild(f...
What is the difference between a mutable and immutable string in C#?
...t immutable (rather, it is mutable)
so if you have to alter a string many times, such as multiple concatenations, then use StringBuilder.
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Create a “with” block on several context managers? [duplicate]
Suppose you have three objects you acquire via context manager, for instance A lock, a db connection and an ip socket.
You can acquire them by:
...
How to find a min/max with Ruby
...each.
@nicholasklick mentions another option, Enumerable#minmax, but this time returning an array of [min, max].
[4, 5, 7, 10].minmax
=> [4, 10]
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How to remove unused imports from Eclipse
...
Its for 1 file ata time
– minil
Jun 4 '13 at 5:45
6
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When should you not use virtual destructors?
...e of your class. This makes sure the correct destructor gets called at run time without the compiler having to know the class of an object on the heap at compile time. For example, assume B is a subclass of A:
A *x = new B;
delete x; // ~B() called, even though x has type A*
If your code is n...
Does HTTP use UDP?
This might be a silly question:
14 Answers
14
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