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How can I remove a flag in C?

...ation of the flag you want to unset. A Bitwise NOT inverts every bit (i.e. 0 => 1, 1 => 0). flags = flags & ~MASK; or flags &= ~MASK;. Long Answer ENABLE_WALK = 0 // 00000000 ENABLE_RUN = 1 // 00000001 ENABLE_SHOOT = 2 // 00000010 ENABLE_SHOOTRUN = 3 // 00000011 value ...
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NSIS学习笔记(持续更新) - C/C++ - 清泛网 - 专注C/C++及内核技术

...习笔记(持续更新)Q 如何使用C++开发插件,示例环境:VS2013Update4参考资料[3]来做S1:新建一个空的C++DLL项目,nsMessageBoxPlugin.S2:复制C: Program File...Q 如何使用C++开发插件,示例 环境:VS2013Update4 参考资料[3]来做 S1:新建一个空的C++DL...
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Why is a round-trip conversion via a string not safe for a double?

...mber->precision = precision; if (((FPDOUBLE*)&value)->exp == 0x7FF) { number->scale = (((FPDOUBLE*)&value)->mantLo || ((FPDOUBLE*)&value)->mantHi) ? SCALE_NAN: SCALE_INF; number->sign = ((FPDOUBLE*)&value)->sign; number->digits[0] =...
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How should I validate an e-mail address?

...am", as will org.apache.commons.validator.routines.EmailValidator) (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0...
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Remove insignificant trailing zeros from a number?

... first place since it was created as a Number, not a String. var n = 1.245000 var noZeroes = n.toString() // "1.245" share | improve this answer | follow | ...
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Does JavaScript have a method like “range()” to generate a range within the supplied bounds?

... Numbers [...Array(5).keys()]; => [0, 1, 2, 3, 4] Character iteration String.fromCharCode(...[...Array('D'.charCodeAt(0) - 'A'.charCodeAt(0) + 1).keys()].map(i => i + 'A'.charCodeAt(0))); => "ABCD" Iteration for (const x of Array(5).keys()) { co...
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What to do about Eclipse's “No repository found containing: …” error messages?

... 450 Quick answer Go to Help → Install new software → Here uncheck “Contact all update sites d...
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0.1 float is greater than 0.1 double. I expected it to be false [duplicate]

...loat. float has 24 binary bits of precision, and double has 53. In binary, 0.1 is: 0.1₁₀ = 0.0001100110011001100110011001100110011001100110011…₂ ^ ^ ^ ^ 1 10 20 24 So if we round up at the 24th digit, we'll get 0.1₁₀ ~ 0.00011...
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?

I first noticed in 2009 that GCC (at least on my projects and on my machines) have the tendency to generate noticeably faster code if I optimize for size ( -Os ) instead of speed ( -O2 or -O3 ), and I have been wondering ever since why. ...
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SVG get text element width

...| edited Jan 21 '13 at 18:04 RobM 7,08722 gold badges3838 silver badges3636 bronze badges answered Oct 2...