大约有 46,000 项符合查询结果（耗时：0.0276秒） [XML]
What is the attribute property=“og:title” inside meta tag?
...third-party website to Facebook when a page is shared (or liked, etc.). In order to make this possible, information is sent via Open Graph meta tags in the <head> part of the website’s code.
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How can I retrieve Id of inserted entity using Entity framework? [closed]
...here in-case people are looking to "solve" the problem I had.
Consider an Order object that has foreign key relationship with Customer. When I added a new customer and a new order at the same time I was doing something like this;
var customer = new Customer(); //no Id yet;
var order = new Order();...
When should I use the HashSet type?
...here's no such thing as the 45th element of a set. Items in a set have no ordering. The sets {1, 2, 3} and {2, 3, 1} are identical in every respect because they have the same membership, and membership is all that matters.
It's somewhat dangerous to iterate over a HashSet<T> because doing...
Synchronization vs Lock
...s a class called as Lock , which would basically serialize the control in order to access the critical resource. It gives method such as park() and unpark() .
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In SQL, how can you “group by” in ranges?
...on Tuffin, however when you have two ranges like 10-20 , 100-200, then the order does not work. you would have order like 10-20, 100-200,20-30 etc. Any tip for the order by?
– Zo Has
Mar 26 '14 at 5:22
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efficient way to implement paging
...1].[Name],
[t1].[Code]
FROM (
SELECT ROW_NUMBER() OVER (
ORDER BY [t0].[CodCity],
[t0].[CodCountry],
[t0].[CodRegion],
[t0].[Name],
[t0].[Code]) AS [ROW_NUMBER],
[t0].[CodCity],
[t0].[CodCountry],
[t0].[CodRegion],
...
PostgreSQL Crosstab Query
...ELECT *
FROM crosstab(
'SELECT section, status, ct
FROM tbl
ORDER BY 1,2' -- needs to be "ORDER BY 1,2" here
) AS ct ("Section" text, "Active" int, "Inactive" int);
Returns:
Section | Active | Inactive
---------+--------+----------
A | 1 | 2
B | ...
How do I convert this list of dictionaries to a csv file?
... dict_writer.writerows(toCSV)
EDIT: My prior solution doesn't handle the order. As noted by Wilduck, DictWriter is more appropriate here.
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What is the usefulness of PUT and DELETE HTTP request methods?
... led to URIs containing verbs, like for instance
POST http://example.com/order/1/delete
or even worse
POST http://example.com/deleteOrder/id/1
effectively tunneling CRUD semantics over HTTP. But verbs were never meant to be part of the URI. Instead HTTP already provides the mechanism and sema...
jQuery UI Sortable, then write order into a database
I want to use the jQuery UI sortable function to allow users to set an order and then on change, write it to the database and update it. Can someone write an example on how this would be done?
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