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How to pip install a package with min and max version range?
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edited Jun 15 '16 at 18:32
Leif Arne Storset
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answere...
Reduce, fold or scan (Left/Right)?
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Marc GrueMarc Grue
5,81333 gold badges1313 silver badges1818 bronze badges
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Which is faster in Python: x**.5 or math.sqrt(x)?
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math.sqrt(x) is significantly faster than x**0.5.
import math
N = 1000000
%%timeit
for i in range(N):
z=i**.5
10 loops, best of 3: 156 ms per loop
%%timeit
for i in range(N):
z=math.sqrt(i)
10 loops, best of 3: 91.1 ms per loop
Using Python 3.6.9 ...
Difference between numpy.array shape (R, 1) and (R,)
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554
1. The meaning of shapes in NumPy
You write, "I know literally it's list of numbers and list ...
how do I insert a column at a specific column index in pandas?
...insert(loc, column, value)
df = pd.DataFrame({'B': [1, 2, 3], 'C': [4, 5, 6]})
df
Out:
B C
0 1 4
1 2 5
2 3 6
idx = 0
new_col = [7, 8, 9] # can be a list, a Series, an array or a scalar
df.insert(loc=idx, column='A', value=new_col)
df
Out:
A B C
0 7 1 4
1 8 2 5
2 9 ...
Performance of foreach, array_map with lambda and array_map with static function
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FWIW, I just did the benchmark since poster didn't do it. Running on PHP 5.3.10 + XDebug.
UPDATE 2015-01-22 compare with mcfedr's answer below for additional results without XDebug and a more recent PHP version.
function lap($func) {
$t0 = microtime(1);
$numbers = range(0, 1000000);
$ret...
Can dplyr package be used for conditional mutating?
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5 Answers
5
Active
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Get operating system info
...s that, it sniffs your core operating system model, for example windows nt 5.1 as my own.
It then passes windows nt 5.1/i to Windows XP as the operating system.
Using: '/windows nt 5.1/i' => 'Windows XP', from an array.
You could say guesswork, or an approximation yet nonetheless pretty much ...
How to validate an Email in PHP?
How can I validate the input value is a valid email address using php5. Now I am using this code
7 Answers
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Understanding how recursive functions work
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edited Sep 5 '14 at 0:49
answered Sep 5 '14 at 0:43
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