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Why does the indexing start with zero in 'C'?
...t array refers (0 elements away), so it should be denoted as array[0].
For more info:
http://developeronline.blogspot.com/2008/04/why-array-index-should-start-from-0.html
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What are the Dangers of Method Swizzling in Objective-C?
...hat sharp knives are safer.
Method swizzling can be used to write better, more efficient, more maintainable code. It can also be abused and lead to horrible bugs.
Background
As with all design patterns, if we are fully aware of the consequences of the pattern, we are able to make more informed de...
How do I detect unsigned integer multiply overflow?
...(ISO/IEC 14882:2003 3.9.1.4). My use of 'overflow' in the question was the more colloquial meaning, intended to include the well-defined wrapping of unsigned types, since I was interested in unsigned ints representing mathematical positive integers, not positive integers mod 2^32 (or 2^64). The dist...
How do I add multiple arguments to my custom template filter in a django template?
...
It's easy like this.
@register.filter(name='one_more')
def one_more(_1, _2):
return _1, _2
def your_filter(_1_2, _3)
_1, _2 = _1_2
print "now you have three arguments, enjoy"
{{ _1|one_more:_2|your_filter:_3 }}
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...is subtyped (alternatively, vary with subtyping, hence the "co-" prefix). More concretely:
trait List[+A]
List[Int] is a subtype of List[AnyVal] because Int is a subtype of AnyVal. This means that you may provide an instance of List[Int] when a value of type List[AnyVal] is expected. This is r...
Recommended add-ons/plugins for Microsoft Visual Studio [closed]
... is an alternative (obviously not as powerful) for TD.NET which provides a more intuitive (R#-like!) UI (nowhere near as powerful or complete, but does the job)
– Ruben Bartelink
May 19 '09 at 10:57
...
Get month name from number
... = datetime.datetime.now()
mydate.strftime("%B")
Returns: December
Some more info on the Python doc website
[EDIT : great comment from @GiriB] You can also use %b which returns the short notation for month name.
mydate.strftime("%b")
For the example above, it would return Dec.
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What is the instanceof operator in JavaScript?
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CSS \9 in width property
...amp; 9, while in all other browsers, #myElement would be 300 pixels wide.
More info
EDIT:
This answer was written in 2011. It should now be noted that this hack also works in IE 10.
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Reflection - get attribute name and value on property
...ribute type and to return data in a dictionary (note that this can be made more dynamic by passing types into the routine):
public static Dictionary<string, string> GetAuthors()
{
Dictionary<string, string> _dict = new Dictionary<string, string>();
PropertyInfo[] props = ...