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How to update column with null value
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228
No special syntax:
CREATE TABLE your_table (some_id int, your_column varchar(100));
INSERT I...
Specify custom Date format for colClasses argument in read.table/read.csv
..., function(from) as.Date(from, format="%d/%m/%Y") )
tmp <- c("1, 15/08/2008", "2, 23/05/2010")
con <- textConnection(tmp)
tmp2 <- read.csv(con, colClasses=c('numeric','myDate'), header=FALSE)
str(tmp2)
Then modify if needed to work for your data.
Edit ---
You might want to run setClas...
Issue with virtualenv - cannot activate
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21 Answers
21
Active
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Create array of symbols
...original answer was written back in September '11, but, starting from Ruby 2.0, there is a shorter way to create an array of symbols! This literal:
%i[address city state postal country]
will do exactly what you want.
shar...
How do I prevent a Gateway Timeout with FastCGI on Nginx
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245
Proxy timeouts are well, for proxies, not for FastCGI...
The directives that affect FastCGI t...
Pass parameter to fabric task
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208
Fabric 2 task arguments documentation:
http://docs.pyinvoke.org/en/latest/concepts/invoking-t...
How to run a python script from IDLE interactive shell?
...or passing global/local variables.
In deprecated Python versions
Python2
Built-in function: execfile
execfile('helloworld.py')
It normally cannot be called with arguments. But here's a workaround:
import sys
sys.argv = ['helloworld.py', 'arg'] # argv[0] should still be the script name
execf...
Long-held, incorrect programming assumptions [closed]
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