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How long do browsers cache HTTP 301s?
...e.
That is, it will remain cached for as long as the browser's cache can accommodate it. It will be removed from the cache if you manually clear the cache, or if the cache entries are purged to make room for new ones.
You can verify this at least in Firefox by going to about:cache and finding it un...
HTML Input=“file” Accept Attribute File Type (CSV)
...isplay Excel CSV files (.csv), do NOT use:
text/csv
application/csv
text/comma-separated-values (works in Opera only).
If you are trying to display a particular file type (for example, a WAV or PDF), then this will almost always work...
<input type="file" accept=".FILETYPE" />
...
Hidden Features of Java
....atomic subpackage that contains thread-safe primitives that implement the compare-and-swap operation and can map to actual native hardware-supported versions of these operations.
share
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Django auto_now and auto_now_add
...t using a custom save() method.
So, to make this work properly, I would recommend not using auto_now or auto_now_add and instead define your own save() method to make sure that created is only updated if id is not set (such as when the item is first created), and have it update modified every time...
python date of the previous month
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How to see which plugins are making Vim slow?
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'IF' in 'SELECT' statement - choose output value based on column values
...e = 'P', amount, amount * -1) as amount
FROM report
See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html.
Additionally, you could handle when the condition is null. In the case of a null amount:
SELECT id,
IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as amoun...
Mapping over values in a python dictionary
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There is no such function; the easiest way to do this is to use a dict comprehension:
my_dictionary = {k: f(v) for k, v in my_dictionary.items()}
In python 2.7, use the .iteritems() method instead of .items() to save memory. The dict comprehension syntax wasn't introduced until python 2.7.
N...
Split string every nth character?
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Check whether a path is valid
...medUriString():
The string is not correctly escaped.
http://www.example.com/path???/file name
The string is an absolute Uri that represents an implicit file Uri.
c:\\directory\filename
The string is an absolute URI that is missing a slash before the path.
file://c:/directory/filename
The str...