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Format floats with standard json module
...defect in the standard library json package). E.g., this code:
import json
from json import encoder
encoder.FLOAT_REPR = lambda o: format(o, '.2f')
print(json.dumps(23.67))
print(json.dumps([23.67, 23.97, 23.87]))
emits:
23.67
[23.67, 23.97, 23.87]
as you desire. Obviously, there should be an...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...osite key depends on all of its elements, it is impossible to calculate it from partial information.
Advanced features of Boost.MultiIndex key extractors
The Key Extractor concept allows the same object to extract keys from several different types, possibly through suitably defined overloads of op...
What's the function like sum() but for multiplication? product()?
...gested, it is not hard to make your own using reduce() and operator.mul():
from functools import reduce # Required in Python 3
import operator
def prod(iterable):
return reduce(operator.mul, iterable, 1)
>>> prod(range(1, 5))
24
Note, in Python 3, the reduce() function was moved to t...
How to cast int to enum in C++?
...at value. Otherwise the produced enum value will be whatever value results from converting the expression to the enum's underlying type. If VC++ does something different then I think it's non-conformant.
– bames53
Jul 12 '12 at 17:09
...
What is the rationale for all comparisons returning false for IEEE754 NaN values?
Why do comparisons of NaN values behave differently from all other values?
That is, all comparisons with the operators ==, =, where one or both values is NaN returns false, contrary to the behaviour of all other values.
...
What is the easiest way to initialize a std::vector with hardcoded elements?
...
If "list-initialization of an aggregate from an object of the same type" is your thing, probably there are bigger problems in your codebase... I can think of no application where it would justify the debugging problems.
– Adam Erickson
...
Static method behavior in multi-threaded environment in java
...haring the time among them.) So, when the thread schedular give the chance from current excuting thread (A) to thread (B), how is the thread (A) resume from where it was paused? I mean how does it know the resume point? Is it because of "Each thread also has a pointer into the code which points to ...
How can I stage and commit all files, including newly added files, using a single command?
...th a message with:
git coa "A bunch of horrible changes"
Explanation (from git add documentation):
-A, --all, --no-ignore-removal
Update the index not only where the working tree has a file matching but also where the index already has an
entry. This adds, modifies, and removes inde...
Does Flask support regular expressions in its URL routing?
...sk just in case anyone wants a working example of how this could be done.
from flask import Flask
from werkzeug.routing import BaseConverter
app = Flask(__name__)
class RegexConverter(BaseConverter):
def __init__(self, url_map, *items):
super(RegexConverter, self).__init__(url_map)
...
Difference between WebStorm and PHPStorm
...didn't help that much.
You should train your search-fu twice as harder.
FROM: http://www.jetbrains.com/phpstorm/
NOTE: PhpStorm includes all the functionality of WebStorm (HTML/CSS Editor, JavaScript Editor) and adds full-fledged support for PHP and Databases/SQL.
Their forum also has quite...