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Getting the last element of a list
...getting a list item by index will raise an IndexError if the expected item doesn't exist. This means that some_list[-1] will raise an exception if some_list is empty, because an empty list can't have a last element.
share
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REST API - why use PUT DELETE POST GET?
... malibu in the db with the associated colors. I say likely as the REST api does not need to be directly related to the database structure. It is just a masking interface so that the true data is protected (think of it like accessors and mutators for a database structure).
Now we need to move onto t...
Why `null >= 0 && null
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to me the answer does not provide an answer - null is treated in a special way by the Equals Operator (==). In a brief, it only coerces to undefined: - and what? Can you explain, why null >= 0? :)
– Andrey Deineko
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Django - what is the difference between render(), render_to_response() and direct_to_template()?
...xt, context_instance)
What the third parameter context_instance actually does? Being RequestContext it sets up some basic context which is then added to user_context. So the template gets this extended context. What variables are added is given by TEMPLATE_CONTEXT_PROCESSORS in settings.py. For in...
When to use generic methods and when to use wild-card?
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This is strange answer. It doesn't explain why you need to use ? at all. You could rewrite it as `public static <T1 extends Number, T2 extends Number> void copy(List<T1> dest, List<T2> src) and in this case it become obvious what is g...
Differences between action and actionListener
... self-documenting code. Moreover, like actionListener, the f:ajax listener does not support returning a navigation outcome.
<h:commandXxx ... action="#{bean.action}">
<f:ajax execute="@form" render="@form" />
</h:commandXxx>
For explanation on execute and render attributes, he...
What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...f files in one directory. I am not sure why, but sometimes the file system does not cope well with that situation. If anyone knows more about this I would love to hear it.
But I always try to use subdirectories to break things up a bit. Creation date often works well for this:
Images/2008/12/17/....
How to refer environment variable in POM.xml?
...alize my solution relies on the Spring framework, which is probably why it doesn't work for Daniel.
– EricGreg
Aug 17 '18 at 22:42
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Git: Show all of the various changes to a single line in a specified file over the entire git histor
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I know what git blame does; I am looking for a full history of revisions, not a single diff.
– findchris
Mar 30 '12 at 20:50
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Differences between .NET 4.0 and .NET 4.5 in High level in .NET
...following link.
To summarize:
Installation
.NET Framework 4.5 does not support Windows XP or Windows Server 2003, and therefore, if you have to create applications that target these operating systems, you will need to stay with .NET Framework 4.0. In contrast, Windows 8 and Windows Serv...