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What is a Context Free Grammar?
Can someone explain to me what a context free grammar is? After looking at the Wikipedia entry and then the Wikipedia entry on formal grammar, I am left utterly and totally befuddled. Would someone be so kind as to explain what these things are?
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what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
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Following are the three commands which appears same but have minute differences
hadoop fs {args}
hadoop dfs {args}
hdfs dfs {args}
hadoop fs <args>
FS relates to a generic file system which can point to any file s...
What's the role of GetHashCode in the IEqualityComparer in .NET?
I'm trying to understand the role of the GetHashCode method of the interface IEqualityComparer.
3 Answers
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nServiceBus vs Mass Transit vs Rhino Service Bus vs other?
Just doing some quick spikes into possibly using a messaging system to process files that are in a nicely decoupled work flow system.
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WPF Application that only has a tray icon
I am a total WPF newbie and wonder if anyone could give me some pointers how to write an application that starts minimized to tray. The idea is that it periodically fetches an RSS Feed and creates a Toaster-Popup when there are new feeds.
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What is the difference between URI, URL and URN? [duplicate]
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Uniform Resource Identifier (URI) is a string of characters used to identify a name or a resource on the Internet
A URI identifies a resource either by location, or a name, or both. A URI has two specializations known as URL and URN.
A Uniform Resource Locator (URL...
Chaining multiple filter() in Django, is this a bug?
I always assumed that chaining multiple filter() calls in Django was always the same as collecting them in a single call.
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Converting String array to java.util.List
How do I convert a String array to a java.util.List ?
6 Answers
6
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URL matrix parameters vs. query parameters
I'm wondering whether to use matrix or query parameters in my URLs. I found an older discussion to that topic not satisfying.
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Emacs mode for Stack Overflow's markdown
I am using Org-mode in Emacs to handle all my technical documentation. I would like to use Emacs to prepare questions that I have for Stack Overflow. Is there an Emacs mode for that, or even better, an extension for Org-mode to handle Stack Overflow formatting? Ideally it should include all formatti...