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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
... they result in incomplete updates. Two transactions race with each other; one of them successfully INSERTs; the other gets a duplicate key error and does an UPDATE instead. The UPDATE blocks waiting for the INSERT to rollback or commit. When it rolls back, the UPDATE condition re-check matches zero...
What's the best name for a non-mutating “add” method on an immutable collection?
... for "sequence + sequence", never "item + sequence". The problem that someone "might expect it to add two lists together rather than adding a single value to the other list" was explicitly given as a reason not to use one of the other original options.
– Ssswift
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Enterprise Library Unity vs Other IoC Containers [closed]
...ex.com/CommonServiceLocator
That leaves us with initialization, which is done in two ways: via code or via XML configuration (app.config/web.config/custom.config). Some support both, some support only one. I should note: some use attributes to help the IoC along.
So here is my assessment of the ...
What is the “Execute Around” idiom?
... know this is an old question/answer but I wanted to point this out for anyone looking at this question five and a half years later. Both of these language tools will help solve the problem this pattern was invented to fix.
– user439793
Aug 12 '14 at 14:40
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PHP Error handling: die() Vs trigger_error() Vs throw Exception
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The first one should never be used in production code, since it's transporting information irrelevant to end-users (a user can't do anything about "Cannot connect to database").
You throw Exceptions if you know that at a certain criti...
How to remove an item for a OR'd enum?
... (&) with some value (let's call that value 'X') and the complement of one or more set bits (let's call those bits Q and their complement ~Q), the statement X & ~Q clears any bits that were set in Q from X and returns the result.
So to remove or clear the BLUE bits, you use the following st...
How do you configure an OpenFileDialog to select folders?
...ept only folders. Ever since I've seen this I've wanted to know how it's done. I am aware of the FolderBrowserDialog, but I've never really liked that dialog. It starts too small and doesn't let me take advantage of being able to type a path.
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MySQL > Table doesn't exist. But it does (or it should)
...tadir of a MySQL installation and all the bases moved correctly except for one.
I can connect and USE the database. SHOW TABLES also returns me all the tables correctly, and the files of each table exists on the MySQL data directory.
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Visual Studio Project vs. Solution
...eptual feature of a VS project (what determines its 'granularity') is that one project produces one output: typically an executable or a library (dll). So, if you are going to code three executables that uses related code, you'll create one solution and at least three projects - probably more.
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Facebook API - How do I get a Facebook user's profile image through the Facebook API (without requir
... specify the picture size you want with the type argument, which should be one of square (50x50), small (50 pixels wide, variable height), normal (100 pixels wide, variable height), and large (about 200 pixels wide, variable height)" Via Graph API on Facebook
– user603284
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