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pandas: How do I split text in a column into multiple rows?
...43]: %timeit (pd.DataFrame(list(df.col.str.split())))
10 loops, best of 3: 86.1 ms per loop
In [144]: %timeit (df.col.str.split(expand=True))
10 loops, best of 3: 156 ms per loop
In [145]: %timeit (pd.DataFrame([ x.split() for x in df['col'].tolist()]))
10 loops, best of 3: 54.1 ms per loop
But ...
Why are my JavaScript function names clashing?
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JLRisheJLRishe
86.2k1414 gold badges107107 silver badges141141 bronze badges
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Why does this Java code compile?
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86
int x = x = 1;
is equivalent to
int x = 1;
x = x; //warning here
while in
int x = x + 1; ...
How to properly URL encode a string in PHP?
...(['subject'=>$subject, 'body'=>$body], null, '&', PHP_QUERY_RFC3986);.
– William Entriken
Aug 21 '19 at 13:34
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Using arrays or std::vectors in C++, what's the performance gap?
...sembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct S
{
int padding;
std::vector<int> v;
int * p;
std::vector<int>::iterator i;
};
int pointer_index (S & s) { return s.p[3]; }
// movq 32(...
Cannot use ref or out parameter in lambda expressions
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86
Under the hood, the anonymous method is implemented by hoisting captured variables (which is wh...
What is the purpose of `text=auto` in `.gitattributes` file?
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FlimmFlimm
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How to tell if JRE or JDK is installed
...ora OpenJDK JDK8
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.fc24.x86_64/jre/lib/amd64
#### FAIL: Fedora OpenJDK JDK8
/usr/java/jdk1.8.0_231-amd64/jre/lib/amd64
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How does Go compile so quickly?
...d with the language design, resulted in a really fast compiler working on 286-class hardware. I think that even now, modern Pascal compilers (e.g. FreePascal) are faster than Go compilers.
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i...
What do people find difficult about C pointers? [closed]
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86
I suspect people are going a bit too deep in their answers. An understanding of scheduling, act...