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What is a race condition?
...read scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in data is dependent on the thread scheduling algorithm, i.e. both threads are "racing" to access/change the data....
What are bitwise shift (bit-shift) operators and how do they work?
..., you would use the following math:
memoryOffset = (row * 320) + column
Now, back in that day and age, speed was critical, so we would use bitshifts to do this operation.
However, 320 is not a power of two, so to get around this we have to find out what is a power of two that added together make...
What does it mean if a Python object is “subscriptable” or not?
...which can be replayed.
For example, see: Application Scripting Framework
Now, if Alistair didn't know what he asked and really meant "subscriptable" objects (as edited by others), then (as mipadi also answered) this is the correct one:
A subscriptable object is any object that implements the __ge...
What is copy-on-write?
I would like to know what copy-on-write is and what it is used for? The term 'copy-on-write array' is mentioned several times in the Sun JDK tutorials but I didn't understand what it meant.
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Spring DAO vs Spring ORM vs Spring JDBC
...to the proper DataAccessException subclass.
As an example, suppose you're now using Hibernate, and your service layer catches HibernateException in order to react to it. If you change to JPA, your DAOs interfaces should not change, and the service layer will still compile with blocks that catches H...
How can you represent inheritance in a database?
...problems identified for the single table method:
Mandatory attributes can now be enforced with NOT NULL.
Adding a new subtype requires adding a new table instead of adding columns to an existing one.
There is also no risk that an inappropriate attribute is set for a particular subtype, such as th...
Freeze screen in chrome debugger / DevTools panel for popover inspection?
... (by hovering or however) and wait until Chrome breaks into the Debugger.
Now click on the Elements tab in the Chrome Inspector, and you can look for your element there.
You may also be able to click on the Find Element icon (looks like a magnifying glass) and Chrome will let you go and inspect an...
What does pylint's “Too few public methods” message mean
...ough if a class seems like the best choice, use it. pylint doesn't always know what's best.
Do note that namedtuple is immutable and the values assigned on instantiation cannot be modified later.
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Convert Year/Month/Day to Day of Year in Python
...ery simple solution:
from datetime import datetime
day_of_year = datetime.now().timetuple().tm_yday
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Scala Programming for Android
...er for mobile applications. Additionally, the IDE runs out of memory every now and then. I assume dex is not made for big libraries like the scala-library .
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