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Optimistic vs. Pessimistic locking
...essential that the data is accurately read, with no un-shown changes - the extra locking overhead is worth it.
Oh, and Microsoft SQL server defaults to page locking - basically the row you're reading and a few either side. Row locking is more accurate but much slower. It's often worth setting your...
Confusion between numpy, scipy, matplotlib and pylab
...ort matplotlib.pyplot as plt.
Pylab is the same thing as pyplot, but with extra features (its use is currently discouraged).
pylab = pyplot + numpy
See more information here: Matplotlib, Pylab, Pyplot, etc: What's the difference between these and when to use each?
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Proper Repository Pattern Design in PHP?
...ximum performance, controllers should only receive the data they need—no extra fields.
Implementation should leverage some type of data mapper for ease of development.
Implementation should have the ability to perform complex data lookups.
The Solution
I'm splitting my persistent storage (datab...
Do I need all three constructors for an Android custom view?
...
can I add extra parameters to constructor and How can I use them ?
– Mohammed Subhi Sheikh Quroush
Dec 18 '13 at 13:09
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Threading in a PyQt application: Use Qt threads or Python threads?
... (although the caveat above still applies.)
Non-blocking I/O
Threads add extraordinarily complexity to your application. Especially when dealing with the already complex interaction between the Python interpreter and compiled module code. While many find event-based programming difficult to follow...
What are the differences between “=” and “
...on); and when isolated from surrounding logical structure, by braces or an extra pair of parentheses.
A confession: I lied earlier. There is one additional difference between the = and <- operators: they call distinct functions. By default these functions do the same thing but you can overrid...
Re-raise exception with a different type and message, preserving existing information
...ng the exception; it's specifically about not handling it, but adding some extra information (an additional class and a new message) so that it can be handled further up the call stack.
– bignose
Apr 27 '09 at 3:24
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Best Practices for securing a REST API / web service [closed]
...the caller already knows that credentials are required, Digest requires an extra roundtrip to exchange the nonce value. With Basic, the callers simply sends the credentials the first time.
Once the identity of the client is established, authorization is really just an implementation problem. Howeve...
Best way to remove from NSMutableArray while iterating?
...
Extra memory needs to be allocated to do inverse. It's not an in-place algorithm and not a good idea in some cases. When you remove directly you just shift the array (which is very efficient since it won't move one by one, it...
Logging in Scala
...ess isTraceEnabled is true so there's no cost in generating a nice message string. This works around the slf4j's interpolation mechanism which requires parsing the error message. With this model, you can interpolate any number of values into the error message.
If you have a separate trait that mi...