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Which UUID version to use?
...eed to always generate the same UUID from a given name, you want a version 3 or version 5.
Version 3: This generates a unique ID from an MD5 hash of a namespace and name. If you need backwards compatibility (with another system that generates UUIDs from names), use this.
Version 5: This generates ...
Why did Rails4 drop support for “assets” group in the Gemfile
In Rails 3, gems used exclusively to generate assets in the asset pipeline were properly placed in the assets group of the Gemfile:
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Call apply-like function on each row of dataframe with multiple arguments from each row
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138
You can apply apply to a subset of the original data.
dat <- data.frame(x=c(1,2), y=c(3,4)...
scp (secure copy) to ec2 instance without password
I have an EC2 instance running (FreeBSD 9 AMI ami-8cce3fe5), and I can ssh into it using my amazon-created key file without password prompt, no problem.
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How to change Rails 3 server default port in develoment?
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132
First - do not edit anything in your gem path! It will influence all projects, and you will hav...
Can I have multiple :before pseudo-elements for the same element?
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3 Answers
3
Active
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Get fully qualified class name of an object in Python
...as, the module name is explicitly excluded from __qualname__
# in Python 3.
module = o.__class__.__module__
if module is None or module == str.__class__.__module__:
return o.__class__.__name__ # Avoid reporting __builtin__
else:
return module + '.' + o.__class__.__name__
bar = foo...
Display number with leading zeros
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In Python 2 (and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the same behavior c...
How to get indices of a sorted array in Python
...gt;> import numpy
>>> numpy.argsort(myList)
array([0, 1, 2, 4, 3])
http://docs.scipy.org/doc/numpy/reference/generated/numpy.argsort.html
This returns the arguments that would sort the array or list.
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how to get the current working directory's absolute path from irb
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edited May 18 '13 at 6:34
answered Dec 21 '09 at 1:31
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