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echo that outputs to stderr
...the same file: the one file descriptor #2 was originally referring to. For more information see the Bash Hackers Illustrated Redirection Tutorial.
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SimpleTest vs PHPunit
...only use the assertTrue() method in simpletest. Web-tests, of course, get more complicated, but they don't have to be excessively so.
– Kzqai
May 10 '12 at 17:09
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What does “S3 methods” mean in R?
...ly, the user of your newly created funky model fitting package, it is much more convenient to be able to type predict(myfit, type="class") than predict.mykindoffit(myfit, type="class").
There is quite a bit more to it, but this should get you started. There are quite a few disadvantages to this way...
Vertically centering a div inside another div [duplicate]
...pact your rendering performance so I would suggest that you use one of the more modern solutions.
Here is an example
Tested in:
FF3.5+
FF4+
Safari 5+
Chrome 11+
IE9+
HTML
<div class="cn"><div class="inner">your content</div></div>
CSS
.cn {
display: table-cel...
What's the name for hyphen-separated case?
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What is an idempotent operation?
... idempotent operation is one that has no additional effect if it is called more than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set.
In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, ...
Create unique constraint with null columns
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Private vs Protected - Visibility Good-Practice Concern [closed]
...of thumb is: make everything as private as possible. This makes your class more encapsulated, and allows for changing the internals of the class without affecting the code using your class.
If you design your class to be inheritable, then carefully choose what may be overridden and accessible from...
What is the most ridiculous pessimization you've seen? [closed]
... @RazorStorm On later machines where bandwidth and cache are more precious, the opposite would be true. The bitmask/shift is cheap, but you want to fit as much in cache as possible and also minimize bandwidth.
– Jed
Jul 22 '13 at 18:02
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Why are quaternions used for rotations?
...ions are used in practice. Euler angles use the least memory; matrices use more memory but don't suffer from Gimbal lock and have nice analytical properties; and quaternions strike a nice balance of both, being lightweight, but free from Gimbal lock.
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