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How do I use itertools.groupby()?
...owing example, items in xx are grouped by values in yy. In this case, one set of zeros is output first, followed by a set of ones, followed again by a set of zeros.
xx = range(10)
yy = [0, 0, 0, 1, 1, 1, 0, 0, 0, 0]
for group in itertools.groupby(iter(xx), lambda x: yy[x]):
print group[0], lis...
Practical uses of different data structures [closed]
... Space performance concerns how the amount of memory grows for larger data sets. Also, note that big-O notation ignores constant factors - for smaller data sets, an O(n^2) algorithm may still be faster than an O(n * log n) algorithm that has a higher constant factor. Complex algorithms often have mo...
When are you truly forced to use UUID as part of the design?
... random bits) to make the likeyhood of a collision between this very small set of UUIDs nearly impossible.
strictly speaking, UUIDs only need to be unique among the set of other UUIDs that they might be compared against. If you're generating a UUID to use as a database key, it doesn't matter if som...
Merge 2 arrays of objects
Lets have a look at an example.
33 Answers
33
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Is there a way to ignore header lines in a UNIX sort?
I have a fixed-width-field file which I'm trying to sort using the UNIX (Cygwin, in my case) sort utility.
12 Answers
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LINQ To Entities does not recognize the method Last. Really?
...r way get last element without OrderByDescending and load all entities:
dbSet
.Where(f => f.Id == dbSet.Max(f2 => f2.Id))
.FirstOrDefault();
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
浅析为什么char类型的范围是 -128~+127在C语言中， signed char 类型的范围为-128~127,每本教科书上也这么写，但是没有哪一本书上（包括老师）也不会给你为什么是-128~127，这...在C语言中， signed char 类型的范围为-128~127,每本教科书上...
Where does forever store console.log output?
I installed forever and am using it, finding it quite funny.
11 Answers
11
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What is the C# equivalent of friend? [duplicate]
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The closet equivalent is to create a nested class which will be able to access the outer class' private members. Something like this:
class Outer
{
class Inner
{
// This class can access Outer's private members
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Convert a Unicode string to a string in Python (containing extra symbols)
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See unicodedata.normalize
title = u"Klüft skräms inför på fédéral électoral große"
import unicodedata
unicodedata.normalize('NFKD', title).encode('ascii', 'ignore')
'Kluft skrams infor pa federal electoral groe'
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