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Combine --user with --prefix error with setup.py install
...his file present will cause issues when installing Python packages system-wide (i.e., without --user) as this user with this ~/.pydistutils.cfg.
The cause of this issue
This appears to be an issue with both OpenSUSE and RedHat, which has lead to a bug in virtualenv on these platforms.
The error s...
How to check if a variable exists in a FreeMarker template?
...if it exists. I think that checking for existence and emptiness is a good idea in a lot of cases, and makes your template more robust and less prone to silly errors. In other words, if you check to make sure your variable is not null AND not empty before using it, then your template becomes more f...
Database cluster and load balancing
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Database clustering is a bit of an ambiguous term, some vendors consider a cluster having two or more servers share the same storage, some others call a cluster a set of replicated servers.
Replication defines the method by which a set of servers remain synchronized without having to share t...
Shell script to delete directories older than n days
... start your search in.
-type d: only find directories
-ctime +10: only consider the ones with modification time older than 10 days
-exec ... \;: for each such result found, do the following command in ...
rm -rf {}: recursively force remove the directory; the {} part is where the find result gets su...
How unique is UUID?
How safe is it to use UUID to uniquely identify something (I'm using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a patter...
How to check if a table contains an element in Lua?
...eally add anything to the discussion. It probably would have been a better idea to edit interjay's answer.
– bcdan
Jun 10 '15 at 15:53
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Pass parameter to fabric task
...cordingly. (We hope to improve upon this in future versions of Fabric, provided an intuitive syntax can be found.)"
– Carl G
May 6 '14 at 15:39
4
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Should I use the Reply-To header when sending emails as a service to others?
Suppose we have an application that acts as a middleman, allowing Company A to send reports to their customers.
3 Answers
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Difference between var_dump,var_export & print_r
...bugging purposes, too, but does not include the member's type. It's a good idea to use if you know the types of elements in your array, but can be misleading otherwise. print_r by default prints the result, but allows returning as string instead by using the optional $return parameter.
Array (
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JSR-303 @Valid annotation not working for list of child objects
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You need to decorate addresses member of UserAddressesForm with @Valid annotation. See section 3.1.3 and 3.5.1 of JSR 303: Bean Validation. As I explained in my answer to the question Is there a standard way to enable JSR 303 Bean Validation using annotated method, this is the real use of @Va...