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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...ferent sizes, a pattern came up. Invariably, transposing a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
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MySQL: how to get the difference between two timestamps in seconds
... and the TIME_TO_SEC() functions as follows:
SELECT TIME_TO_SEC(TIMEDIFF('2010-08-20 12:01:00', '2010-08-20 12:00:00')) diff;
+------+
| diff |
+------+
| 60 |
+------+
1 row in set (0.00 sec)
You could also use the UNIX_TIMESTAMP() function as @Amber suggested in an other answer:
SELECT UNIX_...
ObjectiveC Parse Integer from String
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267
I really don't know what was so hard about this question, but I managed to do it this way:
[m...
What are the differences between git remote prune, git prune, git fetch --prune, etc
...g. So, in short, git remote prune and git fetch --prune operate on number 2 above. For example, if you deleted a branch using the git web GUI and don't want it to show up in your local branch list anymore (git branch -r), then this is the command you should use.
To remove a local branch, you shoul...
Objective-C - Remove last character from string
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edited Jan 11 '14 at 21:19
Albert Renshaw
14.7k1717 gold badges8787 silver badges169169 bronze badges
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Repeatedly run a shell command until it fails?
...whatever command you're already using:
untilfail ./runTest --and val1,val2 -o option1 "argument two"
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Remove an entire column from a data.frame in R
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421
You can set it to NULL.
> Data$genome <- NULL
> head(Data)
chr region
1 chr1 CD...
Omitting one Setter/Getter in Lombok
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answered Nov 3 '11 at 11:29
Michael PiefelMichael Piefel
12.8k55 gold badges6161 silver badges9191 bronze badges
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Log4Net, how to add a custom field to my logging
..._date, @thread, @log_level, @logger, @message, @exception, @CustomColumn)
2) Add the parameter definition for the custom column:
<parameter>
<parameterName value="@CustomColumn"/>
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.Pat...
How do I find a specific table in my EDMX model quickly?
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edited Oct 4 '12 at 20:29
answered Oct 4 '12 at 20:24
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