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Sequence contains no matching element
I have an asp.net application in which I am using linq for data manipulation. While running, I get the exception "Sequence contains no matching element".
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Automatically deleting related rows in Laravel (Eloquent ORM)
When I delete a row using this syntax:
13 Answers
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Using querySelector with IDs that are numbers
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It is valid, but requires some special handling. From here: http://mathiasbynens.be/notes/css-escapes
Leading digits
If the first character of an identifier is numeric, you’ll need to escape it based on its Unicode code point. For example, the code point fo...
SQL Server: Is it possible to insert into two tables at the same time?
My database contains three tables called Object_Table , Data_Table and Link_Table . The link table just contains two columns, the identity of an object record and an identity of a data record.
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How to put Google Maps V2 on a Fragment using ViewPager
I am trying to do a tab layout same in Play Store. I got to display the tab layout using a fragments and viewpager from androidhive. However, I can't implement google maps v2 on it. I searched the internet for hours already, but I can't find a tutorial on how to do it. Can some one please show m...
JPA - Returning an auto generated id after persist()
I'm using JPA (EclipseLink) and Spring. Say I have a simple entity with an auto-generated ID:
7 Answers
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How do you perform a left outer join using linq extension methods
Assuming I have a left outer join as such:
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How to continue a Docker container which has exited
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You can restart an existing container after it exited and your changes are still there.
docker start `docker ps -q -l` # restart it in the background
docker attach `docker ps -q -l` # reattach the terminal & stdin
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Cast an instance of a class to a @protocol in Objective-C
...ct (a UIViewController) which may or may not conform to a protocol I've defined.
2 Answers
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SQLAlchemy: cascade delete
I must be missing something trivial with SQLAlchemy's cascade options because I cannot get a simple cascade delete to operate correctly -- if a parent element is a deleted, the children persist, with null foreign keys.
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