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How to find where a method is defined at runtime?
We recently had a problem where, after a series of commits had occurred, a backend process failed to run. Now, we were good little boys and girls and ran rake test after every check-in but, due to some oddities in Rails' library loading, it only occurred when we ran it directly from Mongrel in pro...
Hidden Features of MySQL
I've been working with Microsoft SQL Server with many years now but have only just recently started to use MySQL with my web applications, and I'm hungry for knowledge.
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What is the default value for enum variable?
An enum variable, anyone know if it is always defaulting to the first element?
2 Answers
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Getting URL hash location, and using it in jQuery
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Editor's note: the approach below has serious security implications and, depending upon the version of jQuery you are using, may expose your users to XSS attacks. For more detail, see the discussion of the possible attack in th...
PostgreSQL - max number of parameters in “IN” clause?
...e source code located here, starting at line 850, PostgreSQL doesn't explicitly limit the number of arguments.
The following is a code comment from line 870:
/*
* We try to generate a ScalarArrayOpExpr from IN/NOT IN, but this is only
* possible if the inputs are all scalars (no RowExprs) and th...
How to Create Deterministic Guids
In our application we are creating Xml files with an attribute that has a Guid value. This value needed to be consistent between file upgrades. So even if everything else in the file changes, the guid value for the attribute should remain the same.
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Java 8 NullPointerException in Collectors.toMap
... don't understand this behaviour, maps can contain null pointers as value without any problems. Is there a good reason why values cannot be null for Collectors.toMap ?
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gitignore without binary files
How can binary files be ignored in git using the .gitignore file?
18 Answers
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MySQL SELECT only not null values
Is it possible to do a select statement that takes only NOT NULL values?
9 Answers
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How do I switch between the header and implementation file in Xcode 4?
How do I switch between the header and implementation file in Xcode 4?
7 Answers
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