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You have already activated X, but your Gemfile requires Y
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Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake you had matched the version in your Gemfile, so you didn't get any warning when simply using rake.
Yehuda Katz (one of t...
Overriding == operator. How to compare to null? [duplicate]
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Use object.ReferenceEquals(person1, null) instead of the == operator:
public static bool oper...
Uncaught TypeError: undefined is not a function on loading jquery-min.js
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answered Jun 4 '12 at 15:42
DustinDustin
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Example of UUID generation using Boost in C++
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Removing input background colour for Chrome autocomplete?
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How to generate gcc debug symbol outside the build target?
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edited May 7 '12 at 12:21
chmurli
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Plotting a list of (x, y) coordinates in python matplotlib
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answered Feb 3 '14 at 3:26
sashkellosashkello
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C++: Rounding up to the nearest multiple of a number
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