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How do I stop Entity Framework from trying to save/insert child objects?
... child entities. This is causing all sorts of integrity problems. How do I force EF to only save the entity I want to save and therefore ignore all child objects?
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How to create a drop-down list?
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Spinner dropdown = findViewById(R.id.spinner1);
//create a list of items for the spinner.
String[] items = new String[]{"1", "2", "three"};
//create an adapter to describe how the items are displayed, adapters are used in several places in android.
//There are multiple variations of this, but this...
How to add Options Menu to Fragment in Android
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Thanks for the help, I added the super method, and realised I had removed the @Override so added this back in, eclipse threw an error so I replaced the MenuInflater to import android.view.MenuInflater; instead of import android.supp...
How do you perform a left outer join using linq extension methods
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For a (left outer) join of a table Bar with a table Foo on Foo.Foo_Id = Bar.Foo_Id in lambda notation:
var qry = Foo.GroupJoin(
Bar,
foo => foo.Foo_Id,
bar => bar.Foo_Id,
(x,y) ...
SQL SELECT speed int vs varchar
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Int comparisons are faster than varchar comparisons, for the simple fact that ints take up much less space than varchars.
This holds true both for unindexed and indexed access. The fastest way to go is an indexed int column.
As I see you've tagged the question postgreql, yo...
Insert, on duplicate update in PostgreSQL?
Several months ago I learned from an answer on Stack Overflow how to perform multiple updates at once in MySQL using the following syntax:
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Find all tables containing column with specified name - MS SQL Server
Is it possible to query for table names which contain columns being
29 Answers
29
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What is the difference between single and double quotes in SQL?
... single quotes.
That's the primary use anyway. You can use single quotes for a column alias — where you want the column name you reference in your application code to be something other than what the column is actually called in the database. For example: PRODUCT.id would be more readable as pr...
Sort a list from another list IDs
.... You mention efficiency in your question. IndexOf is perfectly acceptable for your example and nice and simple. If you had a lot of data my answer might be better suited. stackoverflow.com/questions/3663014/…
– Jodrell
Mar 7 '13 at 17:20
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Get user profile picture by Id
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http://graph.facebook.com/" + facebookId + "/picture?type=square
For instance:
http://graph.facebook.com/67563683055/picture?type=square
There are also more sizes besides "square". See the docs.
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