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Why do we need boxing and unboxing in C#?
...replaced by async/await which are far cleaner and more efficient.
The .Net 1.1 Collections relied entirely on Boxing, because they came before Generics. These are still kicking around in System.Collections. In any new code you should be using the Collections from System.Collections.Generic, which in...
Why does changing 0.1f to 0 slow down performance by 10x?
...
int main() {
double start = omp_get_wtime();
const float x[16]={1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.1,2.2,2.3,2.4,2.5,2.6};
const float z[16]={1.123,1.234,1.345,156.467,1.578,1.689,1.790,1.812,1.923,2.034,2.145,2.256,2.367,2.478,2.589,2.690};
float y[16];
for(int i=0;i&l...
What is the difference between Ruby 1.8 and Ruby 1.9
...im
Decimal Is Still Not The Default
Ruby 1.9
irb(main):001:0> 1.2-1.1
=> 0.0999999999999999
Regex “Properties”
Ruby 1.9
/\p{Space}/
Ruby 1.8.6
/[:space:]/
Splat in Middle
Ruby 1.9
def foo(first, *middle, last)
(->a, *b, c {p a-c}).(*5.downto(1))
Fibers
Ruby 1....
What is Common Gateway Interface (CGI)?
...big deal, then simplicity is worth a lot.
What is its latest update?
1.1
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Webfonts or Locally loaded fonts?
...ternet Explorer (IE 4+)
TrueType and OpenType: Traditional formats (Safari 3.1+, FF 3.5+, Opera 10+)
WOFF: New standard for web fonts (FF 3.6+, Chrome 5+)
SVG: IOS <4.2
More information at The @Font-Face Rule And Useful Web Font Tricks
All of these services support the major font formats. With...
How do Trigonometric functions work?
...for the atan(), asin(), and acos() functions, where an overlapping -1.0 to 1.1 domain was divided into 21 equal intervals with anchor points at -19/20, -17/20, ..., 19/20, 21/20. Then only atan() of these 21 anchor points was stored. Again, with the help of inverse trig identities, a single Maclauri...
RESTful Alternatives to DELETE Request Body
While the HTTP 1.1 spec seems to allow message bodies on DELETE requests, it seems to indicate that servers should ignore it since there are no defined semantics for it.
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Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean
...uture requirements and they made EJB 1.0 and then 2.0 and then 3.0 and now 3.1 but EJB's target was for just some requirements (transaction, distributed component model, etc).
At the same time (in parallel) they realized that they need to support JSF too, then they made JSF managed beans and anothe...
What is an optional value in Swift?
...he provided constant and executes the block. In Xcode 8.3 and later (Swift 3.1), trying to print an optional like this will cause a useless warning. Use the optional's debugDescription to silence it:
print("\(mealPreference.debugDescription)")
What are optionals for?
Optionals have two use cases:
...
What does `someObject.new` do in Java?
...
When inner classes were added to Java in version 1.1 of the language they were originally defined as a transformation to 1.0 compatible code. If you look at an example of this transformation, I think it will make it a lot clearer how an inner class actually works.
Consider...