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How to delete a row by reference in data.table?
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the approach that i have taken in order to make memory use be similar to in-place deletion is to subset a column at a time and delete. not as fast as a proper C memmove solution, but memory use is all i care about here. something like this:
DT = data.table(c...
Tablix: Repeat header rows on each page not working - Report Builder 3.0
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How to ignore HTML element from tabindex?
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If these are elements naturally in the tab order like buttons and anchors, removing them from the tab order with tabindex=-1 is kind of an accessibility smell. If they're providing duplicate functionality removing them from the tab order is ok, and consider adding ari...
abort, terminate or exit?
...t successfully exits the
application, and calls atexit()
functions in LIFO order. I don't
normally see this in C++
applications, however, I do see it in
many unix based applications where it
sends an exit code at the end.
Usually a exit(0) indicates a
successful run of the application.
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How to use MDC with thread pools?
...ns, the newTaskFor methods for Runnable and Callable can be overwritten in order to wrap the argument (see accepted solution) when creating the RunnableFuture.
Note: Consequently, the executorService's submit method must be called instead of the execute method.
For the ScheduledThreadPoolExecutor...
How do I strip non alphanumeric characters from a string and keep spaces?
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In this case I would use the bang method (gsub! instead of gsub) in order to clean the input permanently.
#permanently filter all non-alphanumeric characters, except _
@search_query.gsub!(/\W/,'')
This avoids a situation where @seach_query is used elsewhere in the code without cleaning it...
Finding row index containing maximum value using R
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See ?order. You just need the last index (or first, in decreasing order), so this should do the trick:
order(matrix[,2],decreasing=T)[1]
share
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Should I index a bit field in SQL Server?
...eping track of "IsProcessed"), then an index would be good because it will order them by value and then be able to select the small working set very quickly. If you agree, add that and I will accept it.
– jeremcc
Oct 23 '08 at 21:01
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Can you have if-then-else logic in SQL? [duplicate]
... in dbs it is not optimal because this syntax is procedural - it would be orders of magnitude slower than a proper set based query.
– mson
Feb 28 '13 at 13:42
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C state-machine design [closed]
... can still see some of the content on state-machine.com/resources/articles.php, but even there most of the state machine-related links are dead. This is one of the only good links there: state-machine.com/resources/…
– Tatiana Racheva
Jan 25 '14 at 19:12
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