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How to subtract a day from a date?
... Python datetime object is timezone-aware than you should be careful to avoid errors around DST transitions (or changes in UTC offset for other reasons):
from datetime import datetime, timedelta
from tzlocal import get_localzone # pip install tzlocal
DAY = timedelta(1)
local_tz = get_localzone() ...
How to make overlay control above all other controls?
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If you are using a Canvas or Grid in your layout, give the control to be put on top a higher ZIndex.
From MSDN:
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" WindowTitle="ZIndex Sample">
<Canvas>
<Rectangle ...
How do I edit an existing tag message in git?
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The <tag name>^{} thing didn't work for me. After some searching I determined that this is a Windows thing: cmd.exe uses ^ as a shell escape, so you need to double it up.
– Karl Knechtel
Aug 13 at 16:13
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What does !important mean in CSS?
...tribute' (?) discards the normal concerns as regards the 'later' rule overriding the 'earlier' ones.
Also, ordinarily, a more specific rule will override a less-specific rule. So:
a {
/* css */
}
Is normally overruled by:
body div #elementID ul li a {
/* css */
}
As the latter selec...
How do I automatically sort a has_many relationship in Rails?
...e adding a default order is cumbersome for some reason or you want to override your default in certain cases, it is trivial to specify it in the fetching action itself:
sorted = article.comments.order('created_at').all
sha...
ImportError: no module named win32api
...answered Mar 11 '16 at 19:43
Ciwidey DeveloperCiwidey Developer
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Do HTML WebSockets maintain an open connection for each client? Does this scale?
...urces. Often setting up the connection can be expensive but maintaining an idle connection it is almost free. The first limitation that is usually encountered is the maximum number of file descriptors (sockets consume file descriptors) that can be open simultaneously. This often defaults to 1024 but...
Operator overloading : member function vs. non-member function?
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A common way to avoid making your non-member operators require friend is to implement them in terms of the operation-assignment operators (which will almost certainly be public members). For example, you could define T T::operator+=(const T &a...
Preserve line endings
... files in binary mode, thus not requesting this special processing and considering lines to end at a line feed.`
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Do we still need end slashes in HTML5?
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img tags are Void Elements so they do not need an end tag.
Void elements
area, base, br, col, command, embed, hr, img, input, keygen, link, meta, param, source, track, wbr
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Void elements only have a start tag; end tags must n...