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How to initialize an array's length in JavaScript?

..., e.g. var data = []; var length = 5; // user defined length for(var i = 0; i < length; i++) { data.push(createSomeObject()); } share | improve this answer | follow...
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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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Resizing an image in an HTML5 canvas

...lement them yourself then! Oh come on, we're entering the new age of Web 3.0, HTML5 compliant browsers, super optimized JIT javascript compilers, multi-core(†) machines, with tons of memory, what are you afraid of? Hey, there's the word java in javascript, so that should guarantee the performance,...
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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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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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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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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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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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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...