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Associativity of “in” in Python?
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1 in [] in 'a' is evaluated as (1 in []) and ([] in 'a').
Since the first condition (1 in [])...
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...
What optimizations can GHC be expected to perform reliably?
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+150
This GHC...
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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Rounding a double to turn it into an int (java)
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241
What is the return type of the round() method in the snippet?
If this is the Math.round() met...
How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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cannot load such file — bundler/setup (LoadError)
I'm setting Rails 4 application with Ruby 2.0, but I'm getting "Web application could not be started" and get this trace:
1...
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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