| http://www.w3.org/ns/prov#value | - e catalogs in Ruby ????????? Operations on hashes, arrays, and other data structures such as stacks, trees, and graphs ????????? Working with general I/O, files, and persistent objects ????????? Database coverage including MySQL, SQLite, Oracle, DBI, and more ????????? Ruby-specific techniques in OOP and dynamic programming ????????? Graphical interfaces in Ruby (Tk, GTK+, Fox, and Qt) ?????
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