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Split comma-separated strings in a column into separate rows
...n_info()
#Session info
# version R version 3.3.2 (2016-10-31)
# system x86_64, mingw32
#Packages
# data.table * 1.10.4 2017-02-01 CRAN (R 3.3.2)
# dplyr 0.5.0 2016-06-24 CRAN (R 3.3.1)
# forcats 0.2.0 2017-01-23 CRAN (R 3.3.2)
# ggplot2 * 2.2.1 2016-12-30...
Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
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HLGEMHLGEM
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What's the UIScrollView contentInset property for?
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While jball's answer is an excellent description of content insets, it doesn't answer the quest...
What are the benefits of using C# vs F# or F# vs C#? [closed]
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votes
General benefits of functional programming over imperative languages:
You c...
In Python, when should I use a function instead of a method?
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My general rule is this - is the operation performed on the object or by the object?
if it is...
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
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Why does this Java code compile?
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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(...