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How to get all possible combinations of a list’s elements?
...ave a list with 15 numbers in, and I need to write some code that produces all 32,768 combinations of those numbers.
27 An...
How to validate a url in Python? (Malformed or not)
...
Actually, I think this is the best way.
from django.core.validators import URLValidator
from django.core.exceptions import ValidationError
val = URLValidator(verify_exists=False)
try:
val('http://www.google.com')
except Val...
How to disable/enable the sleep mode programmatically in iOS?
...back by overriding the viewWillDisappear:
override func viewWillDisappear(_ animated: Bool) {
UIApplication.shared.isIdleTimerDisabled = false
}
More about UIApplication Class.
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Detect if stdin is a terminal or pipe?
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Summary
For many use cases the POSIX function isatty() is all what it is needed to detect if stdin is connected to a terminal. A minimal example:
#include <unistd.h>
#include <stdio.h>
int main(int argc, char **argv)
{
if (isatty(fileno(stdin)))
puts("stdin is co...
Order discrete x scale by frequency/value
... rearrange it so that it is ordered by the value of the y-axis (i.e., the tallest bar will be positioned on the left).
5 An...
Regular Expression For Duplicate Words
...)\s+\b\1\b/
A good selection of test strings can be found here: http://callumacrae.github.com/regex-tuesday/challenge1.html
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Difference between EXISTS and IN in SQL?
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The exists keyword can be used in that way, but really it's intended as a way to avoid counting:
--this statement needs to check the entire table
select count(*) from [table] where ...
--this statement is true as soon as one match is found
exists ( select * from [table] ...
Invoking JavaScript code in an iframe from the parent page
...oes not work for my gadget, here is my code document.getElementById('remote_iframe_0').contentWindow.my.create_element_gadget('verify_user');" remote_iframe_0 is created programmaticaly by a apache shindig server but window.parent.document.getElementById('remote_iframe_0').contentWindow.my.cr...
Center image in div horizontally [duplicate]
.../* for the img inside your div */
display: block;
margin: 0 auto;
That's all.
Note, that you'll also have to set an initial min-width for your outer div.
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Assert a function/method was not called using Mock
...y to test my application, but I want to assert that some function was not called. Mock docs talk about methods like mock.assert_called_with and mock.assert_called_once_with , but I didn't find anything like mock.assert_not_called or something related to verify mock was NOT called .
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