Alina questions

• Ruby, Delayed jobs, Delayed:Backend:Activerecord
• ruby, `match': invalid byte sequence in UTF-8
• Ruby on Rails, select and deselect all checkboxes
• ruby: wrap each element of an array in additional quotes
• Scala: abstract classes with anonymous types
• R: roxygen2, imported packages do not appear in namespace
• Python: wordcloud, repetitve words
• round but .5 should be floored

Alina answers