大约有 47,000 项符合查询结果（耗时：0.0626秒） [XML]
Simulate first call fails, second call succeeds
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answered Aug 2 '12 at 20:51
Jon SkeetJon Skeet
1211k772772 gold badges85588558 silver badges88218821 bronze badges
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Why does the MongoDB Java driver use a random number generator in a conditional?
...hat this piece of code amounts to
if (!_ok && Math.random() <= 0.1)
return res;
The commit that originally introduced this logic had
if (_ok == true) {
_logger.log( Level.WARNING , "Server seen down: " + _addr, e );
} else if (Math.random() < 0.1) {
_logger.log( Level.WARNING ...
How to make an immutable object in Python?
..."b"])
It does not solve the problem that attributes can be accessed via [0] etc., but at least it's considerably shorter and provides the additional advantage of being compatible with pickle and copy.
namedtuple creates a type similar to what I described in this answer, i.e. derived from tuple an...
Reading file contents on the client-side in javascript in various browsers
...as been proposed as a standard and implemented in most browsers (as of IE 10, which added support for FileReader API described here, though not yet the File API). The API is a bit more complicated than the older Mozilla API, as it is designed to support asynchronous reading of files, better support ...
Regular expression for a string that does not start with a sequence
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edited May 22 '09 at 20:05
answered May 22 '09 at 18:57
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PowerShell script not accepting $ (dollar) sign
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answered Oct 23 '09 at 18:23
Shankar R10NShankar R10N
4,42811 gold badge1818 silver badges2424 bronze badges
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Alter column, add default constraint
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answered Jan 19 '10 at 17:07
SQLMenaceSQLMenace
122k2323 gold badges194194 silver badges218218 bronze badges
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Get Folder Size from Windows Command Line
...d up sizes recursively (the following is a batch file):
@echo off
set size=0
for /r %%x in (folder\*) do set /a size+=%%~zx
echo %size% Bytes
However, this has several problems because cmd is limited to 32-bit signed integer arithmetic. So it will get sizes above 2 GiB wrong1. Furthermore it will l...
Python `if x is not None` or `if not x is None`?
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1029
There's no performance difference, as they compile to the same bytecode:
Python 2.6.2 (r262:7...
Use NUnit Assert.Throws method or ExpectedException attribute?
...actice?
– SamuelDavis
Feb 22 '13 at 0:03
5
@SamuelDavis - in general you wouldn't want to test di...