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JavaScript isset() equivalent

...you often use if(array.foo) { ... } to do the same, but this is not exactly the same statement. The condition will also evaluate to false if array.foo does exists but is false or 0 (and probably other values as well). ...
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How is the AND/OR operator represented as in Regular Expressions?

I'm currently programming a vocabulary algorithm that checks if a user has typed in the word correctly. I have the following situation: The correct solution for the word would be "part1, part2". The user should be able to enter either "part1" (answer 1), "part2" (answer 2) or "part1, part2" (answer ...
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What are advantages of Artificial Neural Networks over Support Vector Machines? [closed]

ANN (Artificial Neural Networks) and SVM (Support Vector Machines) are two popular strategies for supervised machine learning and classification. It's not often clear which method is better for a particular project, and I'm certain the answer is always "it depends." Often, a combination of both alon...
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How to change maven logging level to display only warning and errors?

...our question I made a small investigation because I am also interested in the solution. Maven command line verbosity options According to http://books.sonatype.com/mvnref-book/reference/running-sect-options.html#running-sect-verbose-option -e for error -X for debug -q for only error Maven logging ...
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Access lapply index names inside FUN

Is there a way to get the list index name in my lapply() function? 12 Answers 12 ...
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Can ordered list produce result that looks like 1.1, 1.2, 1.3 (instead of just 1, 2, 3, …) with css?

Can an ordered list produce results that looks like 1.1, 1.2, 1.3 (instead of just 1, 2, 3, ...) with CSS? So far, using list-style-type:decimal has produced only 1, 2, 3, not 1.1, 1.2., 1.3. ...
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How do I implement an Objective-C singleton that is compatible with ARC?

How do I convert (or create) a singleton class that compiles and behaves correctly when using automatic reference counting (ARC) in Xcode 4.2? ...
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Length of generator output [duplicate]

Python provides a nice method for getting length of an eager iterable, len(x) that is. But I couldn't find anything similar for lazy iterables represented by generator comprehensions and functions. Of course, it is not hard to write something like: ...
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Split column at delimiter in data frame [duplicate]

I would like to split one column into two within at data frame based on a delimiter. For example, 6 Answers ...
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Error handling in C code

What do you consider "best practice" when it comes to error handling errors in a consistent way in a C library. 22 Answers ...