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What is the difference between a heuristic and an algorithm?
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An algorithm is typically deterministic and proven to yield an optimal result
A heuristic has no proof of correctness, often involves random elements, and may not yield optimal results.
Many problems for which no efficient algorithm to find an...
Temporarily switch working copy to a specific Git commit
...the log, pick the commit you want, note down the sha1 hash that is used to identify the commit. Next, run git checkout hash. After you are done, git checkout original_branch. This has the advantage of not moving the HEAD, it simply switches the working copy to a specific commit.
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How to do URL decoding in Java?
..., which is not the same as the encoding scheme
defined in RFC2396.
Basically:
String url = "https%3A%2F%2Fmywebsite%2Fdocs%2Fenglish%2Fsite%2Fmybook.do%3Frequest_type";
System.out.println(new java.net.URI(url).getPath());
will give you:
https://mywebsite/docs/english/site/mybook.do?request_t...
Updating address bar with new URL without hash or reloading the page
... answered Jul 27 '10 at 1:34
David MurdochDavid Murdoch
79.4k3838 gold badges139139 silver badges183183 bronze badges
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Make xargs execute the command once for each line of input
... per command line.
Trailing blanks cause an input line to be logically continued on
the next input line. Implies -x.
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What's the difference between a single precision and double precision floating point operation?
... as the greater data precision available with 64-bit data types is not typically required by 3D games, as well as the fact that processing 64-bit data uses twice as much RAM, cache, and bandwidth, thereby reducing the overall system performance.
From Webopedia:
The term double precision is som...
What is the use of “ref” for reference-type variables in C#?
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so you basically get a reference to the original reference
– lhahne
Jun 7 '09 at 11:17
2
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A non-blocking read on a subprocess.PIPE in Python
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Inside the thread, the call to out.readline blocks the thread, and main thread, and I have to wait until readline returns before everything else continues. Any easy way around that? (I'm reading multiple lines from my process, which is also another...
List all files and directories in a directory + subdirectories
...eSystemEntries exists in .NET 4.0+ and returns both files and directories. Call it like so:
string[] entries = Directory.GetFileSystemEntries(path, "*", SearchOption.AllDirectories);
Note that it won't cope with attempts to list the contents of subdirectories that you don't have access to (Unauth...
How to get file_get_contents() to work with HTTPS?
... following code worked fine when I was using the test server (which wasn't calling an SSL URL), but now when I am testing it on the working server with HTTPS, it's failing with the error message "failed to open stream".
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