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MPICH vs OpenMPI
...rts the Cray Gemini interconnect, but its usage is not supported by Cray. More recently, MPICH supported InfiniBand through a netmod (now deprecated), but MVAPICH2 has extensive optimizations that make it the preferred implementation in nearly all cases.
Feature Support from the Latest MPI Standar...
Replace string within file contents
...tice this was tagged with "homework". I won't delete my answer but will be more careful in future
– Gareth Davidson
Nov 9 '10 at 0:58
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How to trigger a file download when clicking an HTML button or JavaScript
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JavaScript checking for null vs. undefined and difference between == and ===
...values usually used to indicate the absence of something. undefined is the more generic one, used as the default value of variables until they're assigned some other value, as the value of function arguments that weren't provided when the function was called, and as the value you get when you ask an...
How can I get the line number which threw exception?
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If you need the line number for more than just the formatted stack trace you get from Exception.StackTrace, you can use the StackTrace class:
try
{
throw new Exception();
}
catch (Exception ex)
{
// Get stack trace for the exception with source fi...
How to store date/time and timestamps in UTC time zone with JPA and Hibernate
...erty:
<property name="hibernate.jdbc.time_zone" value="UTC"/>
For more details, check out this article.
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How accurate is python's time.sleep()?
...the OS is doing on both Windows and Linux if they are busy doing something more important sleep() from the docs "the suspension time may be longer than requested by an arbitrary amount because of the scheduling of other activity in the system".
– markmnl
May 8 ...
JavaScript closures vs. anonymous functions
...cope but not in another. Thus, this definition seems like a subset of the more general definition I'm used to (see kev's answer) where a closure is a closure is a closure regardless of the scope it is called, or even if it is never called!
– Briguy37
Oct 17 '1...
Reorder levels of a factor without changing order of values
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some more, just for the record
## reorder is a base function
df$letters <- reorder(df$letters, new.order=letters[4:1])
library(gdata)
df$letters <- reorder.factor(df$letters, letters[4:1])
You may also find useful Releve...
Determining Whether a Directory is Writeable
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Although what Christophe suggested is a more Pythonic solution, the os module does have the os.access function to check access:
os.access('/path/to/folder', os.W_OK) # W_OK is for writing, R_OK for reading, etc.
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