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Default value of BOOL
...L ivar, it will be initialized to NO, as the whole instance is filled with 0 on initialization.
(Note: When ARC is enabled, local object pointers will always be have a default value nil, but local variables of non-object types like BOOL are still initialized to garbage. See Local variables set to n...
What is a “memory stomp”?
...e are several common ways memory can be stomped.
One is allocating, say, 100 bytes of memory but then storing something past the 100th address. This memory might be used to hold something completely different. This is particularly hard to debug because the problem will appear when something tries t...
Python creating a dictionary of lists
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answered Jun 6 '09 at 23:00
mechanical_meatmechanical_meat
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How to migrate back from initial migration in Django 1.7?
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You can do the same with Django 1.7+ also:
python manage.py migrate <app> zero
This cl...
.NET 4.0 build issues on CI server
Anybody manage to get .NET 4.0 applications compiling on a CI server without installing Visual Studio 2010 on a CI server?
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What is the default initialization of an array in Java?
...hing that holds an object) that is null.
For int/short/byte/long that is a 0.
For float/double that is a 0.0
For booleans that is a false.
For char that is the null character '\u0000' (whose decimal equivalent is 0).
When you create an array of something, all entries are also zeroed. So your arra...
Floating elements within a div, floats outside of div. Why?
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10 Answers
10
Active
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How to sum a variable by group
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404
Using aggregate:
aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1...
How to check the version of GitLab?
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edited Jun 20 at 9:12
Community♦
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answered Mar 3 '14 at 4:03
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How do I select child elements of any depth using XPath?
...nhofnwellnhof
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