大约有 30,000 项符合查询结果(耗时:0.0707秒) [XML]

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Why is x86 ugly? Why is it considered inferior when compared to others? [closed]

..., but lack of architectural registers was still a significant weakness for 32-bit x86. x86-64's increase from 8 to 16 integer and vector registers is one of the biggest factors in 64bit code being faster than 32-bit (along with the more efficient register-call ABI), not the increased width of each ...
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What is the difference between float and double?

... ARM) float is indeed a IEEE single-precision floating point number (binary32), and double is a IEEE double-precision floating point number (binary64). share | improve this answer | ...
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What are the mechanics of short string optimization in libc++?

...tore a short string (i.e. largest capacity() without an allocation). On a 32 bit machine, 10 chars will fit in the short string. sizeof(string) is 12. On a 64 bit machine, 22 chars will fit in the short string. sizeof(string) is 24. A major design goal was to minimize sizeof(string), while maki...
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Example images for code and mark-up Q&As [closed]

...d interface that defines the URLs and makes them easy to access. Details: 32x32 pixel PNG (4 colors x 5 shapes) with partial transparency (along the edges). Categories: png icons       Sprite Sheets Chess Pieces as originally seen ...
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Converting strings to floats in a DataFrame

... jpp 124k2323 gold badges154154 silver badges204204 bronze badges answered May 24 '13 at 12:54 JeffJeff ...
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What platforms have something other than 8-bit char?

...turned up for example in OMAP2. There are other DSPs out there with 16 and 32 bit char. I think I even heard about a 24-bit DSP, but I can't remember what, so maybe I imagined it. Another consideration is that POSIX mandates CHAR_BIT == 8. So if you're using POSIX you can assume it. If someone late...
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What data type to use for hashed password field and what length?

...ex digits by half. MD5 generates a 128-bit hash value. You can use CHAR(32) or BINARY(16) SHA-1 generates a 160-bit hash value. You can use CHAR(40) or BINARY(20) SHA-224 generates a 224-bit hash value. You can use CHAR(56) or BINARY(28) SHA-256 generates a 256-bit hash value. You can use CHAR...
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Efficient way to determine number of digits in an integer

...++; } return digits; } // partial specialization optimization for 32-bit numbers template<> int numDigits(int32_t x) { if (x == MIN_INT) return 10 + 1; if (x < 0) return numDigits(-x) + 1; if (x >= 10000) { if (x >= 10000000) { if (x >= 100...
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Java String to SHA1

... 32 SHA-1 (and all other hashing algorithms) return binary data. That means that (in Java) they pro...
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How to support UTF-8 encoding in Eclipse

... You can set a default encoding-set whenever you run eclipse.exe. Open eclipse.ini in your eclipse home directory Or STS.ini in case of STS(Spring Tool Suite) put the line below at the end of the file -Dfile.encoding=UTF-8 ...