大约有 47,000 项符合查询结果（耗时：0.0615秒） [XML]
How can I truncate a datetime in SQL Server?
...rect way (old):
dateadd(dd, datediff(dd,0, getDate()), 0)
This is older now, but it's still worth knowing because it can also easily adapt for other time points, like the first moment of the month, minute, hour, or year.
This correct way uses documented functions that are part of the ansi standa...
Pandas get topmost n records within each group
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Yes, I think that's it. Overlooked this somehow. Do you know good way to number records within group?
– Roman Pekar
Nov 19 '13 at 10:48
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Cross cutting concern example
...presenting single and specific functionality for primary requirements are known as core concerns.
OR
Primary functionlity of the system is knows as core concerns.
For example: Business logic
The concerns representing functionalities for secondary requirements are referred to as crosscutting concerns...
What's the purpose of using braces (i.e. {}) for a single-line if or loop?
...think of is nested if's:
if (cond1)
if (cond2)
doSomething();
Now, assume you now want to doSomethingElse() when cond1 is not met (new feature). So:
if (cond1)
if (cond2)
doSomething();
else
doSomethingElse();
which is obviously wrong, since the else associates with the ...
Android - Handle “Enter” in an EditText
...mpossible" and so on, usually without code. Often his answers are outdated now, so I try not to follow his recommendations.
– CoolMind
Feb 4 '19 at 10:22
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In Firebase, is there a way to get the number of children of a node without loading all the node dat
...way to count children without loading data, but we do plan to add it.
For now, one solution would be to maintain a counter of the number of children and update it every time you add a new child. You could use a transaction to count items, like in this code tracking upvodes:
var upvotesRef = new Fi...
Make xargs execute the command once for each line of input
... away with tr, but they are not available on OS X and other UNIX systems.
Now for the long explanation…
There are two issues to take into account when using xargs:
how does it split the input into "arguments"; and
how many arguments to pass the child command at a time.
To test xargs' behav...
Most used parts of Boost [closed]
When I discovered boost::lexical_cast I thought to myself "why didn't I know about this sooner!" - I hated having to write code like
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Error 'LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt' after
...stalled Visual Studio 2012 Release Preview, and it appears to be fine, but now when I try to use Visual Studio 2010 to compile C++ projects, I get the following error message:
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How does the algorithm to color the song list in iTunes 11 work? [closed]
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Pretty awesome solution. Now need a port from Mathematica to Objective-C, that is a hard struggle.
– loretoparisi
Dec 3 '12 at 20:29
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