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How to create ENUM type in SQLite?
...u only need to use it if you want to determine the sequence of the ENUMs.
Foreign key constraints were introduced in SQLite version 3.6.19.
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Best practices for overriding isEqual: and hash
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Start with
NSUInteger prime = 31;
NSUInteger result = 1;
Then for every primitive you do
result = prime * result + var
For objects you use 0 for nil and otherwise their hashcode.
result = prime * result + [var hash];
For booleans you use two different values
result = prime * r...
What exactly is a Maven Snapshot and why do we need it?
...ot version in Maven is one that has not been released.
The idea is that before a 1.0 release (or any other release) is done, there exists a 1.0-SNAPSHOT. That version is what might become 1.0. It's basically "1.0 under development". This might be close to a real 1.0 release, or pretty far (right af...
Remove data.frame row names when using xtable
...'s quite easy too. I'm writing a report and I want to use xtable package for LaTeX table generation (note that memisc package does the job, but say I want to do this solely with xtable ).
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Is Java “pass-by-reference” or “pass-by-value”?
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Java is always pass-by-value.
Unfortunately, we never handle an object at all, instead juggling object-handles called references (which are passed by value of course). The chosen terminology and semantics easily confuse many beginners.
It goes like this:
p...
XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
I have been trying to figure out how to fix this problem for two days. I'm new to this kind of thing so I would appreciate it if someone could tell me how to fix it.
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Understanding :source option of has_one/has_many through of Rails
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Sometimes, you want to use different names for different associations. If the name you want to use for an association on the model isn't the same as the assocation on the :through model, you can use :source to specify it.
I don't think the above paragraph is much cle...
Android TextView padding between lines
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lineSpacingMultiplier works for me with float values like: android:lineSpacingMultiplier="0.8"
– Juan Saravia
Mar 25 '15 at 16:58
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What is the difference between shallow copy, deepcopy and normal assignment operation?
...pies:
The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, like lists or
class instances):
A shallow copy constructs a new compound object and then (to the extent possible) inserts references into it to the obje...
XML schema or DTD for logback.xml?
...ssions on the net about how great it would be to have an XML schema or DTD for logback.xml file to have at least the very basic validation and auto-completion in IDEs like IDEA or Eclipse, but I never saw any solution.
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