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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
The "N+1 selects problem" is generally stated as a problem in Object-Relational mapping (ORM) discussions, and I understand that it has something to do with having to make a lot of database queries for something that seems simple in the object world.
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Why use iterators instead of array indices?
Take the following two lines of code:
27 Answers
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AppInventor2 .keystore 证书文件 - App版本升级的奥秘 · App Inventor 2 中文网
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Is there a better alternative than this to 'switch on type'?
Seeing as C# can't switch on a Type (which I gather wasn't added as a special case because is relationships mean that more than one distinct case might apply), is there a better way to simulate switching on type other than this?
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querySelector search immediate children
I have some jquery-like function:
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ng-repeat finish event
I want to call some jQuery function targeting div with table. That table is populated with ng-repeat .
15 Answers
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How can I generate an INSERT script for an existing SQL Server table that includes all stored rows?
I'm looking for a way to generate a "Create and insert all rows" script with SQL Management Studio 2008 R2.
4 Answers
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Redefining NULL
I'm writing C code for a system where address 0x0000 is valid and contains port I/O. Therefore, any possible bugs that access a NULL pointer will remain undetected and at the same time cause dangerous behaviour.
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Database sharding vs partitioning
I have been reading about scalable architectures recently. In that context, two words that keep on showing up with regards to databases are sharding and partitioning . I looked up descriptions but still ended up confused.
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Set cURL to use local virtual hosts
Using Apache or Ngnix I always create development sites based on real projects such as http://project1.loc which, after adding to my .hosts file, the browser has no problem using.
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