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Regular expression for floating point numbers

I have a task to match floating point numbers. I have written the following regular expression for it: 12 Answers ...
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What algorithms compute directions from point A to point B on a map?

How do map providers (such as Google or Yahoo! Maps) suggest directions? 18 Answers 18...
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How can I create a copy of an object in Python?

I would like to create a copy of an object. I want the new object to possess all properties of the old object (values of the fields). But I want to have independent objects. So, if I change values of the fields of the new object, the old object should not be affected by that. ...
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What are forward declarations in C++?

At: http://www.learncpp.com/cpp-tutorial/19-header-files/ 8 Answers 8 ...
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Where is the C auto keyword used?

In my college days I read about the auto keyword and in the course of time I actually forgot what it is. It is defined as: ...
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Convert javascript array to string

I'm trying to iterate over a "value" list and convert it into a string. Here is the code: 14 Answers ...
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Does functional programming replace GoF design patterns?

Since I started learning F# and OCaml last year, I've read a huge number of articles which insist that design patterns (especially in Java) are workarounds for the missing features in imperative languages. One article I found makes a fairly strong claim : ...
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Qt events and signal/slots

In the Qt world, what is the difference of events and signal/slots? 10 Answers 10 ...
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How do I delete rows in a data frame?

I have a data frame named "mydata" that looks like this this: 8 Answers 8 ...
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How to check whether an object is a date?

I have an annoying bug in on a webpage: 20 Answers 20 ...