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Why is there no xrange function in Python3?
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How to format numbers as currency string?
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Number.prototype.toFixed
This solution is compatible with every single major browser:
const profits = 2489.8237;
profits.toFixed(3) //returns 2489.824 (rounds up)
profits.toFixed(2) //returns 2489.82
profits.toFixed(7) //returns 2489.8237000 (pads the decim...
What is the difference between Non-Repeatable Read and Phantom Read?
...er A runs the same query twice.
In between, User B runs a transaction and commits.
Non-repeatable read: The A row that user A has queried has a different value the second time.
Phantom read: All the rows in the query have the same value before and after, but different rows are being selected (becau...
git-diff to ignore ^M
...in <file>."
$ git diff --cached --name-only -z | xargs -0 git add
# Commit
$ git commit -m "Fix CRLF"
core.autocrlf is described on the man page.
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Converting between datetime, Timestamp and datetime64
...he long value on numpy-1.8.0 installed as:
pip install git+https://github.com/numpy/numpy.git#egg=numpy-dev
The same example:
>>> from datetime import datetime
>>> import numpy
>>> numpy.datetime64('2002-06-28T01:00:00.000000000+0100').astype(datetime)
1025222400000000...
If unit testing is so great, why aren't more companies doing it? [closed]
The first real software company that I worked at was all about the unit testing (NUnit). I don't know that we were real sticklers for it back then -- I have no idea what our code coverage was like and I was writing most of the unit tests. Since then I've run into some companies that do lots of testi...
How does __proto__ differ from constructor.prototype?
..."map" that I think sheds full light over the matter
http://i.stack.imgur.com/KFzI3.png
I know I'm not the first one making this up but it was more interesting figuring it out that finding it :-). Anyway, after that I found e.g. this another diagram that I think says basicly the same:
Javascript...
How to sort objects by multiple keys in Python?
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def multikeysort(items, columns):
from operator import itemgetter
comparers = [((itemgetter(col[1:].strip()), -1) if col.startswith('-') else
(itemgetter(col.strip()), 1)) for col in columns]
def comparer(left, right):
for fn, mult in comparers:
res...
Optimistic vs. Pessimistic locking
...up through the TxID. This is how distributed transactions using two-phase commit protocols (such as XA or COM+ Transactions) work.
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