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How to re-raise an exception in nested try/except blocks?
I know that if I want to re-raise an exception, I simple use raise without arguments in the respective except block. But given a nested expression like
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Plot correlation matrix into a graph
...the ballpark:
library(lattice)
#Build the horizontal and vertical axis information
hor <- c("214", "215", "216", "224", "211", "212", "213", "223", "226", "225")
ver <- paste("DM1-", hor, sep="")
#Build the fake correlation matrix
nrowcol <- length(ver)
cor <- matrix(runif(nrowcol*nro...
Quit and restart a clean R session from within R?
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If you're in RStudio:
command/ctrl + shift + F10
You can also use
.rs.restartR()
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Find JavaScript function definition in Chrome
... Developer Tools rock, but one thing they don't seem to have (that I could find) is a way to find a JavaScript function's definition. This would be super handy for me because I'm working on a site that includes many external JS files. Sure grep solves this but in the browser would be much better. I ...
How do I do an OR filter in a Django query?
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There is Q objects that allow to complex lookups. Example:
from django.db.models import Q
Item.objects.filter(Q(creator=owner) | Q(moderated=False))
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When I catch an exception, how do I get the type, file, and line number?
...o error")
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_lineno)
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Limiting floats to two decimal points
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You are running into the old problem with floating point numbers that not all numbers can be represented exactly. The command line is just showing you the full floating point form from memory.
With floating point representation, your rounded version is the same numb...
When should I use genetic algorithms as opposed to neural networks? [closed]
Is there a rule of thumb (or set of examples) to determine when to use genetic algorithms as opposed to neural networks (and vice-versa) to solve a problem?
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OS X Bash, 'watch' command
I'm looking for the best way to duplicate the Linux 'watch' command on Mac OS X. I'd like to run a command every few seconds to pattern match on the contents of an output file using 'tail' and 'sed'.
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How can you zip or unzip from the script using ONLY Windows' built-in capabilities?
In Windows you can zip some files by
17 Answers
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