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Determine if Pm>y m>thon is running inside virtualenv
...nside a virtual environment, sm>y m>s.prefix points to the virtual environment, m>and m> sm>y m>s.base_prefix is the prefix of the sm>y m>stem Pm>y m>thon the virtualenv was created from.
The above alwam>y m>s works for Pm>y m>thon 3 stdlib venv m>and m> for recent virtualenv (since version 20). Older versions of virtualenv used sm>y m>s.real_...
How can I get jquerm>y m> .val() AFTER kem>y m>press event?
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@Brillim>and m> m>Y m>ou're right. I made a workaround for this, it's posted below.
– David Oliveros
Jan 26 '14 at 4:08
7
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Ant task to run an Ant target onlm>y m> if a file exists?
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Available m>and m> Condition
<target name="check-abc">
<available file="abc.txt" propertm>y m>="abc.present"/>
</target>
<target name="do-if-abc" depends="check-abc" if="abc.present">
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</target>
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What's the difference between nohup m>and m> ampersm>and m>
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nohup catches the hangup signal (see man 7 signal) while the ampersm>and m> doesn't (except the shell is confgured that wam>y m> or doesn't send SIGHUP at all).
Normallm>y m>, when running a commm>and m> using & m>and m> exiting the shell afterwards, the shell will terminate the sub-commm>and m> with the hangup sign...
GridLam>y m>out m>and m> Row/Column Span Woe
The m>And m>roid Developers Blog post introducing GridLam>y m>out shows this diagram of how spans impact automatic index allocation:
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Difference between timestamps with/without time zone in PostgreSQL
...g to the process of inserting/retrieving values. But readers should understm>and m> that both data tm>y m>pes, timestamp with time zone m>and m> timestamp without time zone, in Postgres do *not actuallm>y m> store time zone information. m>Y m>ou can confirm this with a glance at the data tm>y m>pe doc page: Both tm>y m>pes takes up t...
How to log out user from web site using BASIC authentication?
... automaticallm>y m>.
What m>y m>ou have to do is have the user click a logout link, m>and m> send a ‘401 Unauthorized’ in response, using the same realm m>and m> at the same URL folder level as the normal 401 m>y m>ou send requesting a login.
Them>y m> must be directed to input wrong credentials next, eg. a blank username-...
CSS last-child selector: select last-element of specific class, not last child inside of parent?
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not until CSS selectors level 4 is accepted m>and m> implemented bm>y m> browsers, where m>y m>ou will have access to :nth-match(selector) m>and m> :nth-last-match(selector). See w3.org/TR/selectors4 for more detail.
– Chris
Feb 9 '15 at 22:55
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Reimport a module in pm>y m>thon while interactive
... useful if m>y m>ou have edited the module source file using an external editor m>and m> want to trm>y m> out the new version without leaving the Pm>y m>thon interpreter.
If running Pm>y m>thon 3.4 m>and m> up, do import importlib, then do importlib.reload(nameOfModule).
Don't forget the caveats of using this method:
When ...
What is the meaning of “non temporal” memorm>y m> accesses in x86
...to be seen bm>y m> other processors in a timelm>y m> fashion.
When data is produced m>and m> not (immediatelm>y m>) consumed again, the fact that memorm>y m> store operations read a full cache line first m>and m> then modifm>y m> the cached data is detrimental to performance. This operation pushes data out of the caches which might ...