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Select multiple columns in data.table by their numeric indices
... this without with? for example DT[,list(b:c), as I found it convenient to transform the columns directly in the data table, e.g I can do DT[,list(1/b,2*c)], but this does not work with with.
– jamborta
Nov 14 '12 at 18:00
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PHP: How to handle
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When to use LIBXML_NOCDATA ?
I add the issue when transforming XML to JSON.
$xml = simplexml_load_string("<foo><content><![CDATA[Hello, world!]]></content></foo>");
echo json_encode($xml, true);
/* prints
{
"content": {}
}
*/
Whe...
How do I convert a Ruby class name to a underscore-delimited symbol?
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Rails comes with a method called underscore that will allow you to transform CamelCased strings into underscore_separated strings. So you might be able to do this:
FooBar.name.underscore.to_sym
But you will have to install ActiveSupport just to do that, as ipsum says.
If you don't want t...
Convert Rows to columns using 'Pivot' in SQL Server
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If you are using SQL Server 2005+, then you can use the PIVOT function to transform the data from rows into columns.
It sounds like you will need to use dynamic sql if the weeks are unknown but it is easier to see the correct code using a hard-coded version initially.
First up, here are some quic...
Vertically align an image inside a div with responsive height
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.img-container {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%); /* add browser-prefixes */
}
Working JsBin solution: http://jsbin.com/ihilUnI/2/edit
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What is the role of the bias in neural networks? [closed]
...situations.
In a logistic regression, the expected value of the target is transformed by a link function to restrict its value to the unit interval. In this way, model predictions can be viewed as primary outcome probabilities as shown: Sigmoid function on Wikipedia
This is the final activation la...
Difference between wait() and sleep()
...sn't do that either). Don't forget Java runs on a VM, so your code will be transformed in something different according to the VM/OS/HW it runs on.
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How do I detect when someone shakes an iPhone?
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}
- (BOOL)canBecomeFirstResponder
{ return YES; }
@end
You can easily transform any UIView (even system views) into a view that can get the shake event simply by subclassing the view with only these methods (and then selecting this new type instead of the base type in IB, or using it when alloc...
Ensuring json keys are lowercase in .NET
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CamelCasePropertyNamesContratResolver do not transform the properties in lowercase, just the first char.
– ToXinE
Sep 18 '15 at 8:26
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Examples of GoF Design Patterns in Java's core libraries
...ce type)
javax.xml.parsers.DocumentBuilderFactory#newInstance()
javax.xml.transform.TransformerFactory#newInstance()
javax.xml.xpath.XPathFactory#newInstance()
Builder (recognizeable by creational methods returning the instance itself)
java.lang.StringBuilder#append() (unsynchronized)
java.lang.S...