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Why is XOR the default way to combine hashes?
...bit) inputs, the AND function output probability distribution is 75% 0 and 25% 1. Conversely, OR is 25% 0 and 75% 1.
The XOR function is 50% 0 and 50% 1, therefore it is good for combining uniform probability distributions.
This can be seen by writing out truth tables:
a | b | a AND b
---+---+--...
What happens when a computer program runs?
...r on some systems (see Billy O'Neal's answer below for more details on Win32).
Other systems can be very different. DOS, for instance, ran in real mode, and its memory allocation when running programs looked much differently:
+-----------+ top of memory
| extended | above the high memory area,...
Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...la collections library re-implementation which is coming in the imminent 2.8 release. Those familiar with the library from 2.7 will notice that the library, from a usage perspective, has changed little. For example...
...
OSX - How to auto Close Terminal window after the “exit” command executed.
...Sandy Chapman
9,83733 gold badges5353 silver badges6262 bronze badges
answered Jul 28 '13 at 16:38
DukeDuke
2,37111 gold badge1313...
Which is generally best to use — StringComparison.OrdinalIgnoreCase or StringComparison.InvariantCul
...ion.
From MSDN's "New Recommendations for Using Strings in Microsoft .NET 2.0"
Summary: Code owners previously using the InvariantCulture for string comparison, casing, and sorting should strongly consider using a new set of String overloads in Microsoft .NET 2.0. Specifically, data that is des...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
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Out of memory errors
An example of misusing large images
...
What is this 'Lambda' everyone keeps speaking of?
...hat perform much more useful tasks. For example filter:
var numbers = [1, 2, 3, 4];
var even = [];
// keep all even numbers from above array
for (var i=0; i<numbers.length; i++) {
if (numbers[i] % 2 === 0) {
even.push(numbers[i]);
}
}
alert(even);
// Using the filter method...
Is there a Pattern Matching Utility like GREP in Windows?
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