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What are the differences between a UIView and a CALayer?
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224
On iOS, every UIView is backed by a Core Animation CALayer, so you are dealing with CALayers whe...
CUDA incompatible with my gcc version
...shipped with CUDA SDK.
I have installed the developers driver (version 270.41.19) and the CUDA toolkit,
then finally the SDK (both the 4.0.17 version).
...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
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144
To clarify on the "This is bad" - you could get all the wheels with 1 select (SELECT * from Wheel;), instead of N+1. With a large N, the pe...
Does Dispose still get called when exception is thrown inside of a using statement?
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answered Feb 5 '09 at 22:54
Jeff YatesJeff Yates
57.4k1818 gold badges133133 silver badges180180 bronze badges
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android button selector
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edited Feb 11 '14 at 15:12
Rudi Kershaw
10.1k55 gold badges4242 silver badges7171 bronze badges
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Why are Python lambdas useful? [closed]
...ions to do stuff. Example:
mult3 = filter(lambda x: x % 3 == 0, [1, 2, 3, 4, 5, 6, 7, 8, 9])
sets mult3 to [3, 6, 9], those elements of the original list that are multiples of 3. This is shorter (and, one could argue, clearer) than
def filterfunc(x):
return x % 3 == 0
mult3 = filter(filterfu...
Casperjs/PhantomJs vs Selenium
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184
They are attacking different problems. Since PhantomJS runs perfectly on the command-line, it is...
Multiple commands in gdb separated by some sort of delimiter ';'?
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answered Aug 11 '09 at 20:40
Sean BrightSean Bright
106k1717 gold badges128128 silver badges138138 bronze badges
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How does Rails keep track of which migrations have run for a database?
...chema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 20120620193144 into the schema_migrations table.
You are free at any point to introduce migrations with earlier versions. Rails will always run any new migrations fo...
Making an array of integers in iOS
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You can use a plain old C array:
NSInteger myIntegers[40];
for (NSInteger i = 0; i < 40; i++)
myIntegers[i] = i;
// to get one of them
NSLog (@"The 4th integer is: %d", myIntegers[3]);
Or, you can use an NSArray or NSMutableArray, but here you will need to wrap up eac...