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Why '&&' and not '&'?

... = 00110010 (in decimal: 32+16+2 = 50) b = 01010011 (in decimal: 64+ 16+2+1 = 83) ---------------- a & b = 00010010 (in decimal: 16+2 = 18) a | b = 01110011 (in decimal: 64+32+16+2+1 = 115) while a logical operator only works in bool: a = true b = false ---------...
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Python - Create a list with initial capacity

... Ned BatchelderNed Batchelder 306k6464 gold badges503503 silver badges608608 bronze badges ...
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How can I export tables to Excel from a webpage [closed]

...sheet name as well. Same type of solution; stackoverflow.com/questions/17126453/… – Espen Schulstad Mar 13 '15 at 10:50 2 ...
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How do I safely pass objects, especially STL objects, to and from a DLL?

... datatypes have the same sizes regardless of whether your app is 32-bit or 64-bit. However, since the size of a given datatype is enforced by the compiler, not by any standard (all the standard guarantees is that 1 == sizeof(char) <= sizeof(short) <= sizeof(int) <= sizeof(long) <= sizeof...
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Difference between and

...x.B@157aa53 creating bean C: com.xxx.C@ec4a87 creating bean A: com.yyy.A@1d64c37 setting A.bbb with com.xxx.B@157aa53 setting A.ccc with com.xxx.C@ec4a87 Even if the bean for class A isn't obtained by scanning, the processing tools are still applied by <context:component-scan> on all beans r...
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How to securely save username/password (local)?

...gt; <value>AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAAQpgaPYIUq064U3o6xXkQOQAAAAACAAAAAAAQZgAAAAEAACAAAABlQQ8OcONYBr9qUhH7NeKF8bZB6uCJa5uKhk97NdH93AAAAAAOgAAAAAIAACAAAAC7yQicDYV5DiNp0fHXVEDZ7IhOXOrsRUbcY0ziYYTlKSAAAACVDQ+ICHWooDDaUywJeUOV9sRg5c8q6/vizdq8WtPVbkAAAADciZskoSw3g6N9EpX/8FOv+Fe...
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Actionbar notification count icon (badge) like Google has

...ounded_square"/> </RelativeLayout> drawable-xhdpi/ic_bell.png A 64x64 pixel image with 10 pixel wide paddings from all sides. You are supposed to have 8 pixel wide paddings, but I find most default items being slightly smaller than that. Of course, you'll want to use different sizes for d...
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How can I profile C++ code running on Linux?

... 0.9 0.81 0.081 0.181 0.47012987 0.1 0.8 0.64 0.064 0.245 0.636363636 0.1 0.7 0.49 0.049 0.294 0.763636364 0.1 0.6 0.36 0.036 0.33 0.857142857 0.1 0.5 0.25 0.025 ...
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Why does changing 0.1f to 0 slow down performance by 10x?

... depending on whether 0 or 0.1 is used. Here's the test code compiled on x64: int main() { double start = omp_get_wtime(); const float x[16]={1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.1,2.2,2.3,2.4,2.5,2.6}; const float z[16]={1.123,1.234,1.345,156.467,1.578,1.689,1.790,1.812,1.923,2...
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User Authentication in ASP.NET Web API

...g role) { string[] parts = UTF8Encoding.UTF8.GetString(Convert.FromBase64String(Request.Headers.Authorization.Parameter)).Split(':'); if (parts.Length != 2 || !Membership.ValidateUser(parts[0], parts[1])) throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.Unau...