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Split (explode) pandas dataframe string entry to separate rows

... for _, row in a.iterrows()]).reset_index() Out[55]: index 0 0 a 1 1 b 1 2 c 1 3 d 2 4 e 2 5 f 2 Then you just have to rename the columns share | impr...
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How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?

...conds with'%Q tho. – Mini John Feb 10 '15 at 2:13 3 To follow up on @TheMiniJohn's answer. It loo...
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Setting different color for each series in scatter plot on matplotlib

... 280 I don't know what you mean by 'manually'. You can choose a colourmap and make a colour array ea...
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How do I do base64 encoding on iOS?

..., 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' }; @implementation NSString (NSStringAdditions) + (NSString *) base64StringFromData: (NSData *)data length: (int)length { unsigned long ixtext, lentext; long ctr...
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Interpolating a string into a regex

... answered Sep 29 '08 at 18:53 Jonathan LonowskiJonathan Lonowski 108k3131 gold badges188188 silver badges191191 bronze badges ...
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All falsey values in JavaScript

... Falsey values in JavaScript false Zero of Number type: 0 and also -0, 0.0, and hex form 0x0 (thanks RBT) Zero of BigInt type: 0n and -0n (new in 2020, thanks GetMeARemoteJob) "", '' and `` - strings of length 0 null undefined NaN document.all (in HTML browsers only) This is a ...
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Obfuscated C Code Contest 2006. Please explain sykes2.c

...>> ";;;====~$::199"[_*2&8|_/64]/(_&2?1:8)%8&1 : 10); } Introducing variables to untangle this mess: main(int i) { if(i^448) main(-~i); if(--i % 64) { char a = -~7[__TIME__-i/8%8][">'txiZ^(~z?"-48]; char b = a >> ";;;====~$::199"[i...
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C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术

...代码列在下面: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 #include <stdio.h> struct str{ int len; char s[0]; }; struct foo { struct str *a; }; int main(int argc, char** argv) { struct foo f={0}...
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What is the >>>= operator in C?

... The line: while( a[ 0xFULL?'\0':-1:&gt;&gt;&gt;=a&lt;:!!0X.1P1 ] ) contains the digraphs :&gt; and &lt;:, which translate to ] and [ respectively, so it's equivalent to: while( a[ 0xFULL?'\0':-1 ] &gt;&gt;= a[ !!0X.1P1 ] ) The literal 0xFUL...
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一分钟明白 VS manifest 原理 - C/C++ - 清泛网 - 专注C/C++及内核技术

...本,相反。 为什么我的manifest明明指明 name="Microsoft.VC80.DebugCRT" version="8.0.50608.0", 但是用depends.exe工具却发现引用的是8.00.50727.42呢? 因为在C:/WINDOWS/WinSxS/Policies下,有publisher configuration file也叫policy文件,如8.0.50727.42.policy文件...