• Keywords
• nan, NaN, inf, Inf, infinite and null
• foo.bar vs .foo.bar
• Cartesian Products
• Generator Expressions in Assignment Right-Hand Sides
• Backtracking (empty) in Assignment RHS Expressions and Reductions.
• Multi-arity Functions and Comma/Semi-colon Confusability
• index/1 is byte-oriented but match/1 is codepoint-oriented
• If A and B are arrays, B|.[A] is the same as B|indices(A)
• Overriding Operator Definitions