大约有 43,000 项符合查询结果（耗时：0.0591秒） [XML]
String was not recognized as a valid DateTime “ format dd/MM/yyyy”
...There's an overload of ParseExact that accepts an array of format patterns and will parse the text if it matches any of them.
– Samuel Neff
Feb 27 '12 at 2:22
7
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How do I partially update an object in MongoDB so the new object will overlay / merge with the exist
...
If I understand the question correctly, you want to update a document with the contents of another document, but only the fields that are not already present, and completely ignore the fields that are already set (even if to another valu...
Multi-key dictionary in c#? [duplicate]
...<T1,T2>(item1, item2);
}
}
You get immutability, .GetHashcode and .Equals for free, which (while you're waiting for C# 4.0) is nice 'n simple...
One warning however: the default GetHashcode implementation (sometimes) only considers the first field so make sure to make the first field t...
Clear icon inside input text
...d browsers
If you need IE9 support here are some workarounds
Using a standard <input type="text"> and some HTML elements:
/**
* Clearable text inputs
*/
$(".clearable").each(function() {
var $inp = $(this).find("input:text"),
$cle = $(this).find(".clearable__clear")...
How to take emulator screenshots using Eclipse?
I need to take screenshots of an android application running on an emulator in Eclipse Galileo.
6 Answers
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How to implement __iter__(self) for a container object (Python)
... to the sequence.
The following will create an iterator that yields five, and then every item in some_list.
def __iter__(self):
yield 5
yield from some_list
Pre-3.3, yield from didn't exist, so you would have to do:
def __iter__(self):
yield 5
for x in some_list:
yield x
...
Disable single warning error
... answered Aug 23 '11 at 10:09
Andreas BrinckAndreas Brinck
45.6k1414 gold badges7979 silver badges112112 bronze badges
...
MySQL Orderby a number, Nulls last
... syntax to sort nulls last. Place a minus sign (-) before the column name and switch the ASC to DESC:
SELECT * FROM tablename WHERE visible=1 ORDER BY -position DESC, id DESC
It is essentially the inverse of position DESC placing the NULL values last but otherwise the same as position ASC.
A go...
Track all remote git branches as local branches
... branch --track ${i#remotes/origin/} $i; done
credits: Val Blant, elias, and Hugo
before git 1.9.1
Note: the following code if used in later versions of git (>v1.9.1) causes
(bug) All created branches to track master
(annoyance) All created local branch names to be prefixed with origin/
fo...
How to show google.com in an iframe?
... answered Jan 2 '12 at 12:21
Andreas KochAndreas Koch
1,72911 gold badge1212 silver badges88 bronze badges
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