大约有 23,000 项符合查询结果（耗时：0.0443秒） [XML]
How do I (or can I) SELECT DISTINCT on multiple columns?
...hat happened on the same day for the same price. The sales that are unique based on day and price will get updated to an active status.
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In c# is there a method to find the max of 3 numbers?
...e your own helper method... I would be happy enough seeing this in my code base once, but not regularly.
(Note that this is likely to be more efficient than Andrew's LINQ-based answer - but obviously the more elements you have the more appealing the LINQ approach is.)
EDIT: A "best of both worlds"...
How to remove a single, specific object from a ConcurrentBag?
...m.Collections.Concurrent types are the way current way to go for .NET Core based implementations.
– Matthew Snyder
Jun 13 '19 at 14:58
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Check if a variable is of function type
...there might be logged error messages). Note: Revision 3 added isFunctionD (based on only typeof == "function") - and it seems to be much faster than Underscore's "fast" version.
– Joel Purra
Feb 2 '12 at 18:35
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Android: combining text & image on a Button or ImageButton
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@Stallman There is a xml-based and code-based solution for scaling: stackoverflow.com/questions/8223936/…
– OneWorld
Feb 12 '15 at 8:59
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How to convert string to boolean php
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"" (an empty string);
"0" (0 as a string)
If you need to set a boolean based on the text value of a string, then you'll need to check for the presence or otherwise of that value.
$test_mode_mail = $string === 'true'? true: false;
EDIT: the above code is intended for clarity of understanding....
How to programmatically close a JFrame
...at at application's quit point.
For example, if your application is frame based, you can add listener WindowAdapter and and call System.exit(...) inside its method windowClosing(WindowEvent e).
Note: you must call System.exit(...) otherwise your program is error involved.
Avoiding unexpected j...
Why does Ruby 1.9.2 remove “.” from LOAD_PATH, and what's the alternative?
...them (they reported "no such file to load" for all require statements that based off the project path). Was there a particular justification for doing this?
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In Windows Azure: What are web role, worker role and VM role?
...d to reflect the discontinuation of VM Role, and update to web/worker role baseline OS images to Windows Server 2012
Good link by @Vladimir. A bit more clarification: All roles (web, worker) are essentially Windows Server. Web and Worker roles are nearly identical:
Web roles are Windows Server VM...
Named string formatting in C#
... at {LastLoginDate}".FormatWith(user);
A third improved method partially based on the two above, from Phil Haack
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