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What is the difference between loose coupling and tight coupling in the object oriented paradigm?
...e another.
This scenario arises when a class assumes too many responsibilities, or when one concern is spread over many classes rather than having its own class.
Loose coupling is achieved by means of a design that promotes single-responsibility and separation of concerns.
A loosely-coupled clas...
How to determine if a list of polygon points are in clockwise order?
...on-convex polygon, such as a crescent. Here's a simple one that will work with non-convex polygons (it'll even work with a self-intersecting polygon like a figure-eight, telling you whether it's mostly clockwise).
Sum over the edges, (x2 − x1)(y2 + y1). If the result is positive the curve is cloc...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
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Here's an implementation that uses a lockfile and echoes a PID into it. This serves as a protection if the process is killed before removing the pidfile:
LOCKFILE=/tmp/lock.txt
if [ -e ${LOCKFILE} ] && kill -0 `cat ${LOCKFILE}`; then
echo "already running"
exit
fi
# make sur...
Simulator slow-motion animations are now on?
A while ago I was experimenting, trying to see if i could get navigation items to animate and scroll between each other.
11...
Is it possible to change the package name of an Android app on Google Play?
I would like to know whether it is technically possible, not whether it is easy or not, to change the actual package name of an Android app that is on Google Play. What I mean by package name is the name that will show up in the URL. Please, can anyone tell me why this is / is not possible?
Thanks!
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custom listview adapter getView method being called multiple times, and in no coherent order
...any times. In your particular case you are doing the worst thing possible with a ListView by giving it a height=wrap_content. This forces ListView to measure a few children out of the adapter at layout time, to know how big it should be. This is what provides ListView with the convertViews you see p...
what is the difference between const_iterator and iterator? [duplicate]
...ss when we are traversing the vector in "read only wise", we prefer const_iterator , right?
3 Answers
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What's the best way to put a c-struct in an NSArray?
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NSValue doesn't only support CoreGraphics structures – you can use it for your own too. I would recommend doing so, as the class is probably lighter weight than NSData for simple data structures.
Simply use an expression like the following:
[NSValue valueWithBytes:&p objCType:@encode(M...
What are some popular naming conventions for Unit Tests? [closed]
...
I am pretty much with you on this one man. The naming conventions you have used are:
Clear about what each test state is.
Specific about the expected behaviour.
What more do you need from a test name?
Contrary to Ray's answer I don't thin...
Difference between array_map, array_walk and array_filter
...nput array(s) while array_walk can; in particular, array_map never changes its arguments.
Array Keys Access:
array_map cannot operate with the array keys, array_walk can.
Return Value:
array_map returns a new array, array_walk only returns true. Hence, if you don't want to create an array as a...