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Abort makefile if variable not set
... an auxiliary function for that:
# Check that given variables are set and all have non-empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. (optional) Error message to print.
check_defined = \
$(strip $(foreach 1,$1, \
$(call __check_defined,$...
Get Element value with minidom with Python
... It's just because of the way they designed it to work with html, to allow for elements such as this <nodeA>Some Text<nodeinthemiddle>__complex__structure__</nodeinthemiddle>Some more text</nodeA>, in this case do you think nodeA's nodeValue should contain all text incl...
jQuery Validate Plugin - Trigger validation of single field
I've got a form that can optionally be pre-populated via facebook connect. Once a user connects, their name and email are automatically filled in. The problem is that this doesn't trigger the remote validation to check if the email already exists.
...
Find out how much memory is being used by an object in Python [duplicate]
...and internal structures related to object types and garbage collection. Finally, some python objects have non-obvious behaviors. For instance, lists reserve space for more objects than they have, most of the time; dicts are even more complicated since they can operate in different ways (they have a ...
Changing the image source using jQuery
...
Yes. This finally did the trick. .destroy() doesn't go nearly far enough. Nuking all the html and than init again actually works when swapping out images of various sizes and such.
– Matt J.
Apr 11 '...
Chrome Dev Tools: How to trace network for a link that opens a new tab?
...e://net-export in the latest version of Chrome) for a detailed overview of all network events happening in your browser.
Other possible solution, depending on your specific problem, may be to enable 'Preserve log' on the 'Network' tab:
and force all links to open in the same tab by executing ...
Where are $_SESSION variables stored?
...ariable storage is determined by PHP's session.save_path configuration. Usually this is /tmp on a Linux/Unix system. Use the phpinfo() function to view your particular settings if not 100% sure by creating a file with this content in the DocumentRoot of your domain:
<?php
phpinfo();
?>
...
How to clone all remote branches in Git?
..., StackOverflow has grown quite a bit in terms of quality.
This "answer" really does not address the question at all. In fact, few of the top-voted answers do.
Here are two answers that will work as of git v2.28.0:
https://stackoverflow.com/a/4754797/430062
https://stackoverflow.com/a/7216269/43006...
Best way to detect when a user leaves a web page?
...
Thanks to Service Workers, it is possible to implement a solution similar to Adam's purely on the client-side, granted the browser supports it. Just circumvent heartbeat requests:
// The delay should be longer than the heartbeat by a ...
Coalesce function for PHP?
...HP 7 introduced a real coalesce operator:
echo $_GET['doesNotExist'] ?? 'fallback'; // prints 'fallback'
If the value before the ?? does not exists or is null the value after the ?? is taken.
The improvement over the mentioned ?: operator is, that the ?? also handles undefined variables without...