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`require': no such file to load — mkmf (LoadError)

...rch for a solution it turns out the -dev package is needed, not just ruby1.8. So if you have ruby1.9.1 doing sudo apt-get install ruby1.9.1-dev or to install generic ruby version, use (as per @lamplightdev comment): sudo apt-get install ruby-dev should fix it. Try locate mkmf to see if the fi...
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DROP IF EXISTS VS DROP?

...ke Sherrill 'Cat Recall'Mike Sherrill 'Cat Recall' 78.5k1616 gold badges103103 silver badges156156 bronze badges ...
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Group by multiple columns in dplyr, using string vector input

... B 0.24943935 3 A C -0.25783892 4 B A 0.15161805 5 B B 0.27189974 6 B C 0.20858897 7 ...
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Collections.emptyList() returns a List?

... answered Nov 20 '08 at 20:34 InverseFalconInverseFalcon 4,56611 gold badge1313 silver badges55 bronze badges ...
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Match whole string

... matchewmatchew 16.9k44 gold badges3838 silver badges4444 bronze badges 12 ...
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Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception?

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Differences in auto-unboxing between Java 6 vs Java 7

...ference type can be cast to a primitive type by unboxing conversion (§5.1.8). The Java 7 JLS also contains a table (table 5.1) of allowed conversions (this table is not included in the Java 5/6 JLS) from reference types to primitives. This explicitly lists casts from Object to primitives as a nar...
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Check if a string contains a substring in SQL Server 2005, using a stored procedure

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How to keep Maven profiles which are activeByDefault active even if another profile gets activated?

...| edited Aug 1 '16 at 15:28 Kariem 3,21422 gold badges3737 silver badges5454 bronze badges answered Sep ...
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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)

...gives an error – Accountant م Apr 18 '19 at 17:25 add a comment  |  ...