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Why is XOR the default way to combine hashes?
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Assuming uniformly random (1-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.
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Optional query string parameters in ASP.NET Web API
...VC4.
Now you can do:
public string GetFindBooks(string author="", string title="", string isbn="", string somethingelse="", DateTime? date= null)
{
// ...
}
and everything will work out of the box.
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Is it possible dynamically to add String to String.xml in Android?
Is it possible to have placeholders in string values in string.xml that can be assigned values at run time?
13 Answers
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How to convert std::string to lower case?
... aware of the function tolower() , however in the past I have had issues with this function and it is hardly ideal anyway as use with a std::string would require iterating over each character.
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“icon-bar” in twitter bootstrap navigation bar
... on narrow browser screens. You can resize your browser window (by making it narrow) to see how the navbar is replaced by that button.
The three span tags create three horizontal lines that look like a button, commonly known as the "burger" icon.
Take a look at icon-bar in bootstrap.css:
.navbar-...
Swipe to Delete and the “More” button (like in Mail app on iOS 7)
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How to Implement
It looks like iOS 8 opens up this API. Hints of such functionality are present in Beta 2.
To get something working, implement the following two methods on your UITableView's delegate to get the desired effect (see gist for ...
Bootstrap 3 Flush footer to bottom. not fixed
I am using Bootstrap 3 for a site I am designing.
13 Answers
13
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Linear Layout and weight in Android
... this funny weight value in the Android documentations.
Now I want to try it for the first time but it isn't working at all.
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git diff two files on same branch, same commit
sorry if this question exists, I surprisingly could not find it :/
6 Answers
6
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How to match, but not capture, part of a regex?
... assertions:
(?<=123-)((apple|banana)(?=-456)|(?=456))
Because even with non-capturing groups (?:…) the whole regular expression captures their matched contents. But this regular expression matches only apple or banana if it’s preceded by 123- and followed by -456, or it matches the empty ...