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super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inh
...ss. Change it like so:
class B(object):
and it will work.
super() and all subclass/superclass stuff only works with new-style classes. I recommend you get in the habit of always typing that (object) on any class definition to make sure it is a new-style class.
Old-style classes (also known as...
How do I create an average from a Ruby array?
...void integer division or your results will be wrong. Also, this isn't generally applicable to every possible element type (obviously, an average only makes sense for things that can be averaged). But if you want to go that route, use this:
class Array
def sum
inject(0.0) { |result, el| result...
lodash multi-column sortBy descending
...dash.com/docs#orderBy) in Lodash as of 4.3.0. The normal sort function is called _.sortBy(lodash.com/docs#sortBy)
– Nidhin David
Feb 12 '16 at 11:19
2
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What is the use of join() in Python threading?
...t clumsy ascii-art to demonstrate the mechanism:
The join() is presumably called by the main-thread. It could also be called by another thread, but would needlessly complicate the diagram.
join-calling should be placed in the track of the main-thread, but to express thread-relation and keep it as s...
Heroku Postgres - terminate hung query (idle in transaction)
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You can install the heroku-pg-extras add-on and run the following command to get the PID:
heroku pg:locks --app <your-app>
Then just do:
heroku pg:kill <pid> --app <your-app>
NOTE: --force option can be used to issue pg_terminate_...
How to run functions in parallel?
...find an answer to my question. I am trying to run multiple functions in parallel in Python.
6 Answers
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What does “program to interfaces, not implementations” mean?
...t worried about implementation and the interface signature determines what all operations can be done. This can be used to change the behavior of a program at run-time. It also helps you to write far better programs from the maintenance point of view.
Here's a basic example for you.
public enum La...
Python Nose Import Error
...stem path. The following fixed this:
source myvirtualenv/activate
pip install nose
which nosetests
/home/me/myvirtualenv/bin/nosetests
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Creating temporary files in bash
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Ignore they typo (extra space). mktemp -dt "$(basename $0).XXXXXXXXXX" is the correct way.
– i4niac
May 28 '14 at 2:06
3
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YouTube Video Embedded via iframe Ignoring z-index?
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@Dan, see my edit... you might already have a query string in your youtube embed code. (like ?rel=0 to not show relevant videos). If that's the case use &wmode=transparent (or opaque - I've heard opaque uses less system resources, so I use that mainly, unless I have a re...