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Get the Row(s) which have the max count in groups using groupby
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341
In [1]: df
Out[1]:
Sp Mt Value count
0 MM1 S1 a 3
1 MM1 S1 n 2
2 ...
Check for array not empty: any?
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Marcel JackwerthMarcel Jackwerth
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How to change line width in ggplot?
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131
Whilst @Didzis has the correct answer, I will expand on a few points
Aesthetics can be set or ...
The most efficient way to implement an integer based power function pow(int, int)
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396
Exponentiation by squaring.
int ipow(int base, int exp)
{
int result = 1;
for (;;)
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Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...:
the_thing = 2
elif something == 'there':
the_thing = 3
else:
the_thing = 4
2.py
something = 'something'
options = {'this': 1, 'that': 2, 'there': 3}
for i in xrange(1000000):
the_thing = options.get(something, 4)
3.py
something = 'something'
options = {'t...
Replace only some groups with Regex
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315
A good idea could be to encapsulate everything inside groups, no matter if need to identify th...
How do I draw a grid onto a plot in Python?
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223
You want to use pyplot.grid:
x = numpy.arange(0, 1, 0.05)
y = numpy.power(x, 2)
fig = plt.figu...
Assign multiple columns using := in data.table, by group
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This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, b = 1:6)
f <- function(x) {list("hi", "hello")}
x[ , c("col1", "col2") := f(), by = a][]
# a b col1 col2
# 1: 1 1 hi hello
# 2: 2 2 hi hello
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Display numbers with ordinal suffix in PHP
...h','th','th');
if (($number %100) >= 11 && ($number%100) <= 13)
$abbreviation = $number. 'th';
else
$abbreviation = $number. $ends[$number % 10];
Where $number is the number you want to write. Works with any natural number.
As a function:
function ordinal($number) {
$ends...
C++ auto keyword. Why is it magic?
... templates on any compiler that even sort of attempted to implement C++98/03. As such, adding support for auto was apparently fairly easy for essentially all the compiler teams--it was added quite quickly, and there seem to have been few bugs related to it either.
When this answer was originally wr...