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How to correctly implement custom iterators and const_iterators?
...fits your container: input, output, forward etc.
Use base iterator classes from standard library. For example, std::iterator with random_access_iterator_tag.These base classes define all type definitions required by STL and do other work.
To avoid code duplication iterator class should be a template...
Inno Setup for Windows service?
...e switch --start to your c# application and start windows service directly from the program by using ServiceController class (msdn.microsoft.com/en-us/library/…).
– lubos hasko
Sep 20 '09 at 2:52
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Ways to iterate over a list in Java
...hanges what object e is referring to rather than changing the actual store from which iterator.next() retrieved the value.
– jacobq
Aug 23 '13 at 19:34
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rsync error: failed to set times on “/foo/bar”: Operation not permitted
I'm getting a confusing error from rsync and the initial things I'm finding from web searches (as well as all the usual chmod'ing) are not solving it:
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How to change the font size on a matplotlib plot
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From the matplotlib documentation,
font = {'family' : 'normal',
'weight' : 'bold',
'size' : 22}
matplotlib.rc('font', **font)
This sets the font of all items to the font specified by the kwargs object, ...
Fastest way to convert JavaScript NodeList to Array?
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With ES6, we now have a simple way to create an Array from a NodeList: the Array.from() function.
// nl is a NodeList
let myArray = Array.from(nl)
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How do I write data into CSV format as string (not file)?
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since i use this quite a lot to stream results asynchronously from sanic back to the user as csv data i wrote the following snippet for Python 3.
The snippet lets you reuse the same StringIo buffer over and over again.
import csv
from io import StringIO
class ArgsToCsv:
def __i...
Python creating a dictionary of lists
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You can use defaultdict:
>>> from collections import defaultdict
>>> d = defaultdict(list)
>>> a = ['1', '2']
>>> for i in a:
... for j in range(int(i), int(i) + 2):
... d[j].append(i)
...
>>> d
defaultdict(<t...
How to split text without spaces into list of words?
...logarithm of the inverse of the probability to avoid overflows.
The code
from math import log
# Build a cost dictionary, assuming Zipf's law and cost = -math.log(probability).
words = open("words-by-frequency.txt").read().split()
wordcost = dict((k, log((i+1)*log(len(words)))) for i,k in enumerat...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
Following on from this question , can someone explain the following in Scala:
4 Answers
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