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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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Inverse dictionary lookup in Python
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answered Apr 2 '10 at 19:21
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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Rails: Default sort order for a rails model?
...eRecord::Base
default_scope { order(created_at: :desc) }
end
For Rails 2.3, 3, you need this instead:
default_scope order('created_at DESC')
For Rails 2.x:
default_scope :order => 'created_at DESC'
Where created_at is the field you want the default sorting to be done on.
Note: ASC is...
How do I translate an ISO 8601 datetime string into a Python datetime object? [duplicate]
I'm getting a datetime string in a format like "2009-05-28T16:15:00" (this is ISO 8601, I believe). One hackish option seems to be to parse the string using time.strptime and passing the first six elements of the tuple into the datetime constructor, like:
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Concatenating two one-dimensional NumPy arrays
...separate arguments.
From the NumPy documentation:
numpy.concatenate((a1, a2, ...), axis=0)
Join a sequence of arrays together.
It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a scalar.
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Undefined reference to `pow' and `floor'
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You need to compile with the link flag -lm, like this:
gcc fib.c -lm -o fibo
This will tell...
How to append contents of multiple files into one file
...) command, with shell redirection (>) into your output file
cat 1.txt 2.txt 3.txt > 0.txt
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jQuery Ajax calls and the Html.AntiForgeryToken()
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How to redirect output to a file and stdout
...e output.file
If you want to include stderr, do:
program [arguments...] 2>&1 | tee outfile
2>&1 redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout. It is also directed to the given output file as of the tee comm...