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A Regex that will never be matched by anything
...a simple literal that I "know" won't appear in my input turns out to be fastest, in Python. With a 5MB input string, and using this in a sub() operation, (?!x)x takes 21% longer, (?!()) is 16%, and ($^) 6% longer. May be significant in some cases, though not in mine.
– Peter ...
Show the progress of a Python multiprocessing pool imap_unordered call?
...
I tested this for Python 2.7.6 and rs._number_left appears to be the number of chunks remaining. So if rs._chunksize isn't 1 then rs._number_left won't be the number of list items remaining.
– Allen
...
How to concatenate properties from multiple JavaScript objects
...
@Juan I believe you are incorrect, and I did some tests to make up my mind. Caching the length is an easy myth of optimization that's been obsolete for many years, and it makes the code (slightly) less readable. Actually, caching the length sometimes slows down the browser (...
Is there a recommended format for multi-line imports?
... NORMAL, RIDGE, END
)
This is the format which Django uses:
from django.test.client import Client, RequestFactory
from django.test.testcases import (
LiveServerTestCase, SimpleTestCase, TestCase, TransactionTestCase,
skipIfDBFeature, skipUnlessAnyDBFeature, skipUnlessDBFeature,
)
from dja...
Build a Basic Python Iterator
...have like a sequence, i.e. give it __getitem__ and __len__ methods. I have tested this on Python 2 and 3.
class CustomRange:
def __init__(self, low, high):
self.low = low
self.high = high
def __getitem__(self, item):
if item >= len(self):
raise Index...
Why is it slower to iterate over a small string than a small list?
... 9 LOAD_CONST 6 (('a', 'b', 'c'))
as tuples are immutable. Test:
>>> python3 -m timeit '[x for x in ("a", "b", "c")]'
1000000 loops, best of 3: 0.369 usec per loop
Great, back up to speed.
For Python 2:
def list_iterate():
[item for item in ["a", "b", "c"]]
dis.dis...
What are attributes in .NET?
...out some and certain frameworks frameworks use some (e.g. NUnit looks for [TestFixture] on a class and [Test] on a test method when loading an assembly).
So when creating your own custom attribute be aware that it will not impact the behaviour of your code at all. You'll need to write the other part...
List of special characters for SQL LIKE clause
...
Potential answer for SQL Server
Interesting I just ran a test using LinqPad with SQL Server which should be just running Linq to SQL underneath and it generates the following SQL statement.
Records
.Where(r => r.Name.Contains("lkjwer--_~[]"))
-- Region Parameters
DECLARE @...
How to make an HTTP POST web request
...se2.Data.Name;
Flurl.Http
It is a newer library sporting a fluent API, testing helpers, uses HttpClient under the hood, and is portable. It is available via NuGet.
using Flurl.Http;
POST
var responseString = await "http://www.example.com/recepticle.aspx"
.PostUrlEncodedAsync(new {...
NSIS学习笔记（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...---------------------------
!include logiclib.nsh
FindProcDLL::FindProc "Test.exe"
StrCmp $R0 1 0 +2
messagebox::show MB_SETFOREGROUND|MB_ICONHAND|MB_DEFBUTTON3|MB_TOPMOST "${PRODUCT_NAME}" "" \
'检测到程序正在运行，是否立即终止程序？$\n$\n\
【终止】终止程序，...