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Best way to handle list.index(might-not-exist) in python?
...g "dirty" about using try-except clause. This is the pythonic way. ValueError will be raised by the .index method only, because it's the only code you have there!
To answer the comment:
In Python, easier to ask forgiveness than to get permission philosophy is well established, and no index will not...
Determine if map contains a value for a key?
What is the best way to determine if a STL map contains a value for a given key?
10 Answers
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Dynamic instantiation from string name of a class in dynamically imported module?
..., knowing its name in a string, but this class 'lives' in a dynamically imported module. An example follows:
7 Answers
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How to wait for the 'end' of 'resize' event and only then perform an action?
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I had luck with the following recommendation: http://forum.jquery.com/topic/the-resizeend-event
Here's the code so you don't have to dig through his post's link & source:
var rtime;
var timeout = false;
var delta = 200;
$(window).resize(function() {
rtime = new Date();...
How to hide UINavigationBar 1px bottom line
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For iOS 13:
Use the .shadowColor property
If this property is nil or contains the clear color, the bar displays no shadow
For instance:
let navigationBar = navigationController?.navigationBar
let navigationBarAppearenc...
Replace console output in Python
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An easy solution is just writing "\r" before the string and not adding a newline; if the string never gets shorter this is sufficient...
sys.stdout.write("\rDoing thing %i" % i)
sys.stdout.flush()
Slightly more sophisticated is a progress bar... this is something...
Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
...h. When I try to run ./manage.py runserver I am getting the following error:
25 Answers
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Case insensitive regular expression without re.compile?
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Pass re.IGNORECASE to the flags param of search, match, or sub:
re.search('test', 'TeSt', re.IGNORECASE)
re.match('test', 'TeSt', re.IGNORECASE)
re.sub('test', 'xxxx', 'Testing', flags=re.IGNORECASE)
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Does IE9 support console.log, and is it a real function?
In which circumstances is window.console.log defined in Internet Explorer 9?
7 Answers
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