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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...blem 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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How to map and remove nil values in Ruby
I have a map which either changes a value or sets it to nil. I then want to remove the nil entries from the list. The list doesn't need to be kept.
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“Invalid signature file” when attempting to run a .jar
...id signature file digest for Manifest main attributes
Bottom line :
It's probably best to keep the official jar as
is and just add it as a dependency in the manifest file for your
application jar file.
share
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How does one make a Zip bomb?
...
Citing from the Wikipedia page:
One example of a Zip bomb is the file
45.1.zip which was 45.1 kilobytes of compressed data, containing nine
layers of nested zip files in sets of
10, each bottom layer archive
contai...
What are the best practices for structuring a large Meteor app with many HTML template files? [close
...ingle HTML template file. Is there some large open source Meteor project with many different HTML template files we can use as a best practice example? Doesn't seem practical to put everything a large app needs all in one template file.
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Loading cross-domain endpoint with AJAX
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jQuery Ajax Notes
Due to browser security restrictions, most Ajax requests are subject to the same origin policy; the request can not successfully retrieve data from a different domain, subdomain, port, or protocol.
Script and JSONP requests are not subject to th...
Best way to reverse a string
I've just had to write a string reverse function in C# 2.0 (i.e. LINQ not available) and came up with this:
48 Answers
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Make .gitignore ignore everything except a few files
I understand that a .gitignore file cloaks specified files from Git's version
control. I have a project (LaTeX) that generates lots of extra files (.auth,
.dvi, .pdf, logs, etc) as it runs, but I don't want those to be tracked.
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Multiple types were found that match the controller named 'Home'
...could use namespaces when declaring your routes. So in the main route definition in Global.asax:
routes.MapRoute(
"Default",
"{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = UrlParameter.Optional },
new[] { "AppName.Controllers" }
);
and in your ~/Ar...
How to update Identity Column in SQL Server?
I have SQL Server database and I want to change the identity column because it started
with a big number 10010 and it's related with another table, now I have 200 records and I want to fix this issue before the records increases.
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