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Remove an entire column from a data.frame in R
Does anyone know how to remove an entire column from a data.frame in R? For example if I am given this data.frame:
6 Answer...
Select datatype of the field in postgres
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Wayne ConradWayne Conrad
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IIS7 deployment - duplicate 'system.web.extensions/scripting/scriptResourceHandler' section
...ploy a .net 3.5 website on the default app pool in IIS7 having the framework section set to 4.0, I get the following error.
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What is the facade design pattern?
...rmal classes. What is important is how they are structured and how they work together to solve a given problem in the best possible way.
The Facade design pattern simplifies the interface to a complex system; because it is usually composed of all the classes which make up the subsystems of the com...
Checking if an object is a given type in Swift
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If you want to check against a specific type you can do the following:
if let stringArray = obj as? [String] {
// obj is a string array. Do something with stringArray
}
else {
// obj is not a string array
}
You can use "as!" and that...
Java: Get first item from a collection
...trs , how can I get the first item out? I could just call an Iterator , take its first next() , then throw the Iterator away. Is there a less wasteful way to do it?
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What is the difference between Class.getResource() and ClassLoader.getResource()?
...ing a stand-alone Java application that continuously loaded a file from disk using the getResourceAsStream ClassLoader method. I was able to edit the file, and the changes were reflected immediately, i.e., the file was reloaded from disk without caching.
However:
I'm working on a project with seve...
Check OS version in Swift?
I'm trying to check system information in Swift. I figured out, that it could be achieved by code:
19 Answers
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How do getters and setters work?
...getMyField()
{
//include validation, logic, logging or whatever you like here
return this.myField;
}
public void setMyField(String value)
{
//include more logic
this.myField = value;
}
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Rotating videos with FFmpeg
I have been trying to figure out how to rotate videos with FFmpeg. I am working with iPhone videos taken in portrait mode. I know how to determine the current degrees of rotation using MediaInfo (excellent library, btw) but I'm stuck on FFmpeg now.
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