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Extracting numbers from vectors of strings
...meric(gsub("([0-9]+).*$", "\\1", years))
or
# pattern is to just remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the element in first index
as.numeric(sapply(strsplit(years, " "), "[[", 1))
...
Checking if all elements in a list are unique
...
An early-exit solution could be
def unique_values(g):
s = set()
for x in g:
if x in s: return False
s.add(x)
return True
however for small cases or if early-exiting is not the common case then I would expect len(x) != len(set(x)) being t...
Sort JavaScript object by key
...
@Phil_1984_ This answer and top voted answer are very different. OP's question was how to sort an object literal. Top voted answer says you can't, then gives a workaround by storing sorted keys in an array, then iterating and prin...
User recognition without cookies or local storage
...as $name => &$profile) {
// Use shorter labels
$data = array_combine($labels, $profile->data);
if ($perceptron->testCase($data, $trainResult) == true) {
$score = $diff = 0;
// Determing the score and diffrennce
foreach ($unknown->data as $item =&g...
How to check if mod_rewrite is enabled in php?
I was wondering if it is possible to check if mod_rewrite is enabled on Apache AND IIS in PHP .
15 Answers
...
How to print matched regex pattern using awk?
...Relevant manual page: https://www.gnu.org/software/sed/manual/sed.html#Back_002dreferences-and-Subexpressions
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UnmodifiableMap (Java Collections) vs ImmutableMap (Google) [duplicate]
... edited Sep 24 '19 at 7:25
sP_
1,16311 gold badge1212 silver badges2626 bronze badges
answered Mar 25 '14 at 13:52
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Histogram Matplotlib
... compute the widths using np.diff, pass the widths to ax.bar and use ax.set_xticks to label the bin edges:
import matplotlib.pyplot as plt
import numpy as np
mu, sigma = 100, 15
x = mu + sigma * np.random.randn(10000)
bins = [0, 40, 60, 75, 90, 110, 125, 140, 160, 200]
hist, bins = np.histogram(x,...
How to get nice formatting in the Rails console
...ease of Ruby 2.0.0.
For rails 4/ruby 2 you could use just
puts object.to_yaml
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Difference between and
...P script (checkout.php) that process the above form's action:
<?php var_dump($_POST); ?>
Test the above on your local machine by creating the two files in a folder named /tmp/test/ then running the built-in PHP web server from shell:
php -S localhost:3000 -t /tmp/test/
Open your browser ...