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Java SafeVarargs annotation, does a standard or best practice exist?
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1) There are many examples on the Internet and on StackOverflow about the particular issue with generics and varargs. Basically, it's when you have a variable number of arguments of a type-parameter type:
<T> void foo(...
Is there documentation for the Rails column types?
...IMESTAMP datatype is stored as a unix timestamp. Its valid range goes from 1970 to 2038, and the time is stored as the number of seconds that have elapsed since the last epoch, which is supposedly standard, but in practice can differ from system to system. Recognizing that relative time was not a go...
Using reflect, how do you set the value of a struct field?
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158
Go is available as open source code. A good way to learn about reflection is to see how the co...
Create a devise user from Ruby console
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197
You can add false to the save method to skip the validations if you want.
User.new({:email =&...
correct way to use super (argument passing)
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107
Sometimes two classes may have some parameter names in common. In that case, you can't pop the...
How to open a file using the open with statement
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317
Python allows putting multiple open() statements in a single with. You comma-separate them. ...
PostgreSQL return result set as JSON array?
...row being converted to a single object. The result looks like this:
[{"a":1,"b":"value1"},{"a":2,"b":"value2"},{"a":3,"b":"value3"}]
9.3 and up
The json_agg function produces this result out of the box. It automatically figures out how to convert its input into JSON and aggregates it into an arr...
Initializing IEnumerable In C#
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187
Ok, adding to the answers stated you might be also looking for
IEnumerable<string> m_oE...
Is there an XSLT name-of element?
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158
This will give you the current element name (tag name)
<xsl:value-of select ="name(.)"/>...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
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191
There's a striking difference here.
valueOf is returning an Integer object, which may have it...