#ecmascript
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Our team at @globaldev are producing some superb in-depth articles right now.
Whatever your level of Ruby you’ll learn something from @matsadler 's Ruby Tips which follows his epic Ruby 2.0.0 in Detail from earlier in the year.
Meanwhile @james_allardice delves into the many changes in ECMAScript 6 (aka JavaScript). The days of rollover JS are long gone.