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What does ~~ (“double tilde”) do in Javascript?
...gives:
NOT 4210 = 111111111111111111111111110101012 = -4310
This differs from Math.floor(-43.2) in that negative numbers are rounded toward zero, not away from it. (The floor function, which would equal -44, always rounds down to the next lower integer, regardless of whether the number is positive...
SSO with CAS or OAuth?
...ites (including SO) for authentication, without actually using any service from the OAuth provider.
– Amir Ali Akbari
Oct 24 '13 at 10:40
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In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
...es which are equal when operands refer to the same object in memory.
(From Comparison Operators in Mozilla Developer Network)
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When should a class be Comparable and/or Comparator?
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The text below comes from Comparator vs Comparable
Comparable
A comparable object is capable of comparing itself with another object. The class itself must implements the java.lang.Comparable interface in order to be able to compare its instanc...
Using Pairs or 2-tuples in Java [duplicate]
My Hashtable in Java would benefit from a value having a tuple structure. What data structure can I use in Java to do that?
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Limiting floats to two decimal points
...exactly. The command line is just showing you the full floating point form from memory.
With floating point representation, your rounded version is the same number. Since computers are binary, they store floating point numbers as an integer and then divide it by a power of two so 13.95 will be repr...
The input is not a valid Base-64 string as it contains a non-base 64 character
...Replace("data:image/png;base64,", String.Empty);
byte[] image64 = Convert.FromBase64String(convert);
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How to call any method asynchronously in c#
...rd to play with new stuff. It was added to .NET 4.5.
Example code snippet from the link (which is itself from this MSDN sample code project):
// Three things to note in the signature:
// - The method has an async modifier.
// - The return type is Task or Task<T>. (See "Return Types" sec...
Java, Classpath, Classloading => Multiple Versions of the same jar/project
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@deckingraj: after some googling i found this from oracle docs: "In the delegation design, a class loader delegates classloading to its parent before attempting to load a class itself. [...] If the parent class loader cannot load a class, the class loader attempts to loa...
Safari 3rd party cookie iframe trick no longer working?
...he "Block Cookies" preference in Safari was set to the default setting of "From third parties and advertisers". http://support.apple.com/kb/HT5190
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