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How do I find Waldo with Mathematica?

... in each image. Obtaining enough training examples. SVMs work best with at least 100 examples of each class. Commercial applications of boosting (e.g., the face-focusing in digital cameras) are trained on millions of positive and negative examples. A quick Google image search turns up some good da...
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Why is good UI design so hard for some Developers? [closed]

... There are people out there who focus on UI design. Learn about design. At least a little bit. Try to learn a few of the design concepts and techniques from the long list below. If you are more ambitious, read some books, attend a conference, take a class, get a degree. There are lot of ways to lear...
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When to use volatile with multi threading?

...lity or restrictions to what volatile does. For example, in MSVC 2010 (at least) Acquire and Release semantics do apply to certain operations on volatile variables. From the MSDN: When optimizing, the compiler must maintain ordering among references to volatile objects as well as references ...
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Knight's Shortest Path on Chessboard

...ny of the 24 points in the set S3 (defined similarly) to (x,y) requires at least two moves. Therefore, if |x1-x0|>4 or |y1-y0|>4, the shortest path from (x0,y0) to (x1,y1) is exactly two moves greater than the shortest path from (x0,y0) to S4. And the latter problem can be solved quickly with...
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Indenting #defines

...aining no new-line characters) or that follows white space containing at least one new-line character, and is ended by the next new-line character. The only possible dispute is the parenthetical expression '(at the start of translation phase 4)', which could mean that the comments before the h...
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Is Java Regex Thread Safe?

...r hand, you shouldn't share a Matcher between different threads. Or at least, if you ever did, you should use explicit synchronization. share | improve this answer | f...
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Choice between vector::resize() and vector::reserve()

...nt you request by reserve, the specification only requires it allocates at least that much, so some implementations may round up to some boundary and thus show higher capacity than 1000. – Jan Hudec Sep 13 '11 at 8:49 ...
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Useless use of cat?

...rit of Unix. grep does not cut and ls does not grep. Therefore at the very least grep foo file1 file2 file3 goes against the design spirit. The orthogonal way of doing it is cat file1 file2 file3 | grep foo. Now, grep foo file1 is merely a special case of grep foo file1 file2 file3, and if you do no...
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Is ASCII code 7-bit or 8-bit?

...I", or even "X3.4-1968", intending to include the national variants, or at least not clearly ruling it out, leading to arguments. Therefore, I personally would use Unicode as the normative reference for ASCII if I had to write a spec where it mattered. That's all I meant. – zw...
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Can hash tables really be O(1)?

...e number of items in the hash. The O(1) lookup performance claim makes at least two assumptions: Your objects can be equality compared in O(1) time. There will be few hash collisions. If your objects are variable size and an equality check requires looking at all bits then performance will beco...