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Remove duplicate elements from array in Ruby

... Just another alternative if anyone cares. You can also use the to_set method of an array which converts the Array into a Set and by definition, set elements are unique. [1,2,3,4,5,5,5,6].to_set => [1,2,3,4,5,6] ...
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How to know when UITableView did scroll to bottom in iPhone

...r table view) to figure out if the last element is being displayed. Docs: http://developer.apple.com/library/ios/documentation/uikit/reference/UITableViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UITableViewDelegate/tableView:willDisplayCell:forRowAtIndexPath: ...
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Structure padding and packing

...It inserts the following "gaps" into your first structure: struct mystruct_A { char a; char gap_0[3]; /* inserted by compiler: for alignment of b */ int b; char c; char gap_1[3]; /* -"-: for alignment of the whole struct in an array */ } x; Packing, on the other hand prevents ...
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What are some compelling use cases for dependent method types?

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Where can I get a “useful” C++ binary search algorithm?

... There is a set of them: http://www.sgi.com/tech/stl/table_of_contents.html Search for: lower_bound upper_bound equal_range binary_search On a separate note: They were probably thinking that searching containers could term up more than one resu...
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Drop multiple tables in one shot in mysql

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psql: FATAL: role “postgres” does not exist

...not have any login password. Check this site for more articles like this: https://medium.com/@Nithanaroy/installing-postgres-on-mac-18f017c5d3f7 share | improve this answer | ...
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How to start working with GTest and CMake

...stall GoogleTest include(ExternalProject) ExternalProject_Add(gtest URL https://googletest.googlecode.com/files/gtest-1.7.0.zip # Comment above line, and uncomment line below to use subversion. # SVN_REPOSITORY http://googletest.googlecode.com/svn/trunk/ # Uncomment line below to freeze a ...
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Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie

...t, and 1 pixel down. You can read up more about coordinate systems here - http://en.wikipedia.org/wiki/Coordinate_system But what you need to know is that, in iOS, every view has it's OWN coordinate system, where the top left corner is the origin. X axis goes on increasing to the right, and y axis...
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Display image as grayscale using matplotlib

...ng like imshow(..., cmap=pyplot.cm.binary) For a list of colormaps, see http://scipy-cookbook.readthedocs.org/items/Matplotlib_Show_colormaps.html share | improve this answer | ...