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How is a CRC32 checksum calculated?

...e polynomial for CRC32 is: x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1 Wikipedia CRC calculation Or in hex and binary: 0x 01 04 C1 1D B7 1 0000 0100 1100 0001 0001 1101 1011 0111 The highest term (x32) is usually not explicitly written, so it can i...
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How are booleans formatted in Strings in Python?

... answered Feb 13 '10 at 22:07 danbendanben 70.8k1818 gold badges113113 silver badges140140 bronze badges ...
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Array.Copy vs Buffer.BlockCopy

...| edited Feb 15 '17 at 12:09 Ajay 16.3k99 gold badges4646 silver badges9090 bronze badges answered Sep 7...
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How does Java handle integer underflows and overflows and how would you check for it?

...tic boolean willAdditionOverflow(int left, int right) { if (right < 0 && right != Integer.MIN_VALUE) { return willSubtractionOverflow(left, -right); } else { return (~(left ^ right) & (left ^ (left + right))) < 0; } } public static boolean willSubtracti...
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Enable 'xp_cmdshell' SQL Server

...f the xp_cmdshell MSDN docs: http://msdn.microsoft.com/en-us/library/ms190693.aspx: -- To allow advanced options to be changed. EXEC sp_configure 'show advanced options', 1 GO -- To update the currently configured value for advanced options. RECONFIGURE GO -- To enable the feature. EXEC sp_config...
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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?

...) and actually use true and false. In a C compiler, this is equivalent to 0 and 1. (note that removing the parentheses will break that due to order of operations) share | improve this answer ...
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How to find out which fonts are referenced and which are embedded in a PDF document

...BAAAAA+Arial-Black TrueType yes yes yes 53 0 CAAAAA+Tahoma TrueType yes yes yes 28 0 DAAAAA+Wingdings-Regular TrueType yes yes yes 43 0 EAAAAA+Webdings TrueType yes yes yes ...
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What does glLoadIdentity() do in OpenGL?

...lent of 1, is not exactly correct. The matrix actually looks like this: 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 That is the identity matrix. Boon is correct, mathematically, that any matrix multiplied with that matrix (or a matrix that looks like that; diagonal ones, all else 0s) will result in the origi...
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How to get different colored lines for different plots in a single figure?

... E.g.: import matplotlib.pyplot as plt import numpy as np x = np.arange(10) plt.plot(x, x) plt.plot(x, 2 * x) plt.plot(x, 3 * x) plt.plot(x, 4 * x) plt.show() And, as you may already know, you can easily add a legend: import matplotlib.pyplot as plt import numpy as np x = np.arange(10) plt...
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Git diff against a stash

... answered Oct 6 '11 at 16:50 AmberAmber 421k7070 gold badges575575 silver badges516516 bronze badges ...