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Why does the order of the loops affect performance when iterating over a 2D array?
...2]
x[0][3]
x[1][0] etc...
Meaning that you're hitting them all in order. Now look at the 1st version. You're doing:
x[0][0]
x[1][0]
x[2][0]
...
Method can be made static, but should it?
...
Performance, namespace pollution etc are all secondary in my view. Ask yourself what is logical. Is the method logically operating on an instance of the type, or is it related to the type itself? If it's the latter, make it a static method. Only move it into...
Workflow for statistical analysis and report writing
...nction. It's completely self-contained, including all the analysis, data, etc. And you can version control the whole file.
I use the StatET plugin for Eclipse for developing the reports, and Sweave is integrated (Eclipse recognizes latex formating, etc). On Windows, it's easy to use MikTEX.
I w...
Writing outputs to log file and console
...ath, redirect outputs and errors to log file, database connection details, etc ) which redirects all the outputs ( echo messages ) and errors to the log file from the executed script using the following code:
...
Pointers vs. values in parameters and return values
...eful use of pointers to items, items are small enough to copy efficiently, etc.). Sometimes you have to think about or measure the specifics of your situation, but that's a rough guide.
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impr...
Mixin vs inheritance
...add ColorAndDimension to a, say, Shape class, a Sprite class, a Car class, etc. And they will all have the same interface (say get/setColor, get/setHeight/Width, etc.)
So, in the generic case a mixin IS inheritance. But you can argue it's a matter of the role of the class in the overall domain as to...
Why is a boolean 1 byte and not 1 bit of size?
...bably) exist computers which support 4-bit byte, you don't have 4-bit bool etc.
However, if you can design such an architecture which can address 4-bit as basic addressable unit, then you will have bool of size 4-bit then, on that computer only!
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“You have mail” message in terminal, os X [closed]
... Hitting any key will cause it to continue to display more of the message, etc., until you read the end of it. Or you can scroll with your mouse/touchpad. You may be able to hit q to abort viewing the message (I can't test that just now, but try it).To delete all messages, you'd use command d *. To ...
Clang optimization levels
On gcc, the manual explains what -O3 , -Os , etc. translate to in terms of specific optimisation arguments ( -funswitch-loops , -fcompare-elim , etc.)
...
Hibernate dialect for Oracle Database 11g?
...*, ROWNUM rnum FROM (
SELECT * FROM TABLES INCLUDING JOINS, ORDERING, etc.) a
WHERE ROWNUM <= 10 )
WHERE rnum > 0;
But there can be other nuances.
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