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Simple explanation of MapReduce?
... to the basics for Map and Reduce.
Map is a function which "transforms" items in some kind of list to another kind of item and put them back in the same kind of list.
suppose I have a list of numbers: [1,2,3] and I want to double every number, in this case, the function to "double every number" ...
Error: Can't set headers after they are sent to the client
... call res.setHeader(name, value) as often as you want until you call res.writeHead(statusCode). After writeHead, the headers are baked in and you can only call res.write(data), and finally res.end(data).
The error "Error: Can't set headers after they are sent." means that you're already in the Body ...
What is the purpose of class methods?
...n that operates on MyClass (factory, dependency injection stub, etc), make it a classmethod. Then it'll be available to subclasses.
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Designer Added then removed by Visual Studio on load/unload
...t keeps adding [Subtype]Designer[/Subtype] to my .vcproj then removing it on the next open and close of the project. There is only one class defined in StoredImageControl.cs . Anyone know how to shut this off as it is really messing up my revision control.
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Replace duplicate spaces with a single space in T-SQL
...en field does not have more than one space (I am not concerned about all white space, just space) between characters.
17 An...
CSS text-overflow: ellipsis; not working?
... in % (percentage) won't work.
The element must have overflow:hidden and white-space:nowrap set.
The reason you're having problems here is because the width of your a element isn't constrained. You do have a width setting, but because the element is set to display:inline (i.e. the default) it is i...
What's a reliable way to make an iOS app crash?
...t to test my app's crash reporting out in the field by deliberately having it crash when the user performs a particular action that a real user is unlikely to do accidentally.
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How can one close HTML tags in Vim quickly?
It's been a while since I've had to do any HTML-like code in Vim , but recently I came across this again. Say I'm writing some simple HTML :
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How do I select the “last child” with a specific class name in CSS? [duplicate]
How do I select the "last child" with the class name: list ?
6 Answers
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JavaScript moving element in the DOM
Let's say I have three <div> elements on a page. How can I swap positions of the first and third <div> ? jQuery is fine.
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