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Delete duplicate records in SQL Server?
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You can do this with window functions. It will order the dupes by empId, and delete all but the first one.
delete x from (
select *, rn=row_number() over (partition by EmployeeName order by empId)
from Employee
) x
where rn > 1;
Run it as a select to see what w...
Returning JSON from PHP to JavaScript?
...le JSON for PHP is GPLv2 licensed, so your own code must be open-source in order to use it.
– Jamie Birch
Feb 14 '18 at 19:14
1
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Why should a function have only one exit-point? [closed]
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This became especially true when you needed to interject assignments in order to examine state (replaced with watch expressions in modern debuggers). It was also too easy to alter the control flow in ways that hid the problem or broke the execution altogether.
Single-exit methods were easier to ...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
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#include "boost/multi_index/member.hpp"
#include "boost/multi_index/ordered_index.hpp"
using boost::multi_index_container;
using namespace boost::multi_index;
struct stu_num{}; // 索引-学号
struct stu_name{}; // 索引-姓名
struct stu_age{}; // 索引-年龄 ...
Easiest way to compare arrays in C#
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This only works if they are in the same order though
– John Demetriou
Feb 12 '16 at 7:00
1
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What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
...eed to wrap up a map with some other characteristics, perhaps some sort of ordered map, like a TreeMap.
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Correct idiom for managing multiple chained resources in try-with-resources block?
...r comments: simplest is (2) to use Closeable resources and declare them in order in the try-with-resources clause. If you only have AutoCloseable, you can wrap them in another (nested) class that just checks that close is only called once (Facade Pattern), e.g. by having private bool isClosed;. In p...
Get position/offset of element relative to a parent container?
...ffsetLeft, elm.offsetTop);
p { position:relative; left:10px; top:85px; border:1px solid blue; }
span{ position:relative; left:30px; top:35px; border:1px solid red; }
<p>
<span>paragraph</span>
</p>
...
Html.DropdownListFor selected value not being set
... code has some conceptual issues:
First,
@Html.DropDownListFor(n => n.OrderTemplates, new SelectList(Model.OrderTemplates, "OrderTemplateId", "OrderTemplateName", 1), "Please select an order template")
When using DropDownListFor, the first parameter is the property where your selected value i...
How does the static modifier affect this code?
... part of declaration. Declaration happens before assignment no matter what order you present them in. A obj = new A(); int num1; int num2 = 0; gets turned into this: A obj; int num1; int num2; obj = new A(); num2 = 0;. Java does this so num1, num2 are defined by the time you reach the new A() constr...