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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's the difference between the Dependency Injection and Service Locator patterns?
Both patterns seem like an implementation of the principle of inversion of control. That is, that an object should not know how to construct its dependencies.
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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?
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Constant pointer vs Pointer to constant [duplicate]
I want to know the difference between
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What are forward declarations in C++?
At: http://www.learncpp.com/cpp-tutorial/19-header-files/
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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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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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Qt events and signal/slots
In the Qt world, what is the difference of events and signal/slots?
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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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How do I delete rows in a data frame?
I have a data frame named "mydata" that looks like this this:
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