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Why is quicksort better than mergesort?
...nterview. They're both O(nlogn) and yet most people use Quicksort instead of Mergesort. Why is that?
29 Answers
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How can I validate a string to only allow alphanumeric characters in it?
... I think this answer is just plain wrong, assuming alphanumeric set is A-Z,a-z and 0-9 because this covers the whole range of Unicode letters and digits, which including non-Latin characters as well. For example, char.IsLetterOrDigit('ก') will return true. csharppad.com/gist/f96a6062f9f...
Create an Array of Arraylists
I am wanting to create an array of arraylist like below:
19 Answers
19
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0.1 float is greater than 0.1 double. I expected it to be false [duplicate]
... say the answer depends on the rounding mode when converting the double to float. float has 24 binary bits of precision, and double has 53. In binary, 0.1 is:
0.1₁₀ = 0.0001100110011001100110011001100110011001100110011…₂
^ ^ ^ ^
1 10 ...
Java Equivalent of C# async/await?
... that's the only way to learn. It is possible to use it without java agent settings in production; that should lower the bar a little (github.com/electronicarts/ea-async).
– thoredge
May 23 '18 at 7:49
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Really Cheap Command-Line Option Parsing in Ruby
... is that you'll get a warning (if you've enabled them) when accessing an unset global variable, but it's still falsey, so it works just fine for throwaway tools and quick scripts.
One caveat pointed out by FelipeC in the comments in "How to do really cheap command-line option parsing in Ruby", is t...
What does the unary plus operator do?
What does the unary plus operator do? There are several definitions that I have found ( here and here ) but I still have no idea what it would be used for. It seems like it doesn't do anything but there has be a reason for it, right?
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Multiple line code example in Javadoc comment
...ties issues (in particular with Generics), e.g.:
* <pre>
* {@code
* Set<String> s;
* System.out.println(s);
* }
* </pre>
Will give correct HTML output:
Set<String> s;
System.out.println(s);
While omitting the @code block (or using a <code> tag) will result in HTML...
Get final URL after curl is redirected
I need to get the final URL after a page redirect preferably with curl or wget.
10 Answers
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String formatting in Python 3
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