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How to append rows to an R data frame

...t(1,n=10),test(2,n=10),test(3,n=10), test(4,n=10)) autoplot(r) For 1E5 rows (measurements done on Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz): nr function time 4 data.frame 228.251 3 sqlite 133.716 2 data.table 3.059 1 rbindlist 169.998 0 placebo 0...

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SQL (MySQL) vs NoSQL (CouchDB) [closed]

... community wiki 4 revs, 2 users 96%Franci Penov 2 ...

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Ternary operator is twice as slow as an if-else block?

...i+4],0 0000007b 7E 2D jle 000000AA 0000007d 8B 44 B7 08 mov eax,dword ptr [edi+esi*4+8] 60: { 61: value += i > 0 ? 2 : 3; 00000081 85 C0 test eax,eax 00000083 7F 07 jg ...

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使用NPAPI编写浏览器插件的源码实例(windows 7/linux) - C/C++ - 清泛网 - ...

...in-part-two/ [2] http://rintarou.dyndns.org/2010/04/23/scriptable-plugin-%E6%8E%A2%E8%A8%8E-20090408/ [3] http://blogold.chinaunix.net/u3/94039/showart_2004756.html [4] https://developer.mozilla.org/en/Plugins [5] 如何在chrome的扩展中使用:http://code.google.com/chrome/extensions/npapi.h...

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Win10正式版官方原版ISO镜像下载大全（64位&32位） - 软件下载 - 清泛网 - ...

...s_10_multiple_editions_x64_dvd_6848463.iso|4303300608|94FD861E82458005A9CA8E617379856A|/ 【32位简体中文家庭/专业版】文件名：cn_windows_10_multiple_editions_x86_dvd_6846431.iso 体积：3.01GB SHA1：21B824F402927E76C65160B62EB8A4EBBABE9C6E： ...

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Fastest hash for non-cryptographic uses?

...5 9f9cfa3b5b339773b8d6dd77bbe931dd 5 - sha1 ca2bd798e47eab85655f0ce03fa46b2e6e20a31f 6 - adler32 f5f2aefc 7 - tiger192,3 d11b7615af06779259b29446948389c31d896dee25edfc50 8 - tiger160,3 d11b7615af06779259b29446948389c31d896dee 9 - tiger128,3 d11b7615af06779259b29446948389c3 10 - ripemd128 5f221a4574a...

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How to convert hex to rgb using Java?

...are hex character 0-9A-F, A=10, F=15 The decimal value is X*16+Y If RR = B7, the decimal for B is 11, so value is 11*16 + 7 = 183 public int[] getRGB(String rgb){ int[] ret = new int[3]; for(int i=0; i<3; i++){ ret[i] = hexToInt(rgb.charAt(i*2), rgb.charAt(i*2+1)); } re...

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How to permanently disable region-folding in Visual Studio 2008

...(for free): http://visualstudiogallery.msdn.microsoft.com/0ca60d35-1e02-43b7-bf59-ac7deb9afbca Auto Expand regions when a file is opened Optionally prevent regions from being collapsed (but still be able to collapse other code) Give the #region / #end region lines a smaller, lighter background so...