A unit of measure as a canonical monomial and a denominator coefficient.

Evaluate returns a unit with a monomial and a denominator coefficient (per, default 1). Zero exponents are dropped. Names are not split on trailing digits (m2 stays %{"m2" => 1}). Inspect always formats the monomial with | and ^ (m^2, m | s, m | s^2). A single exponent-1 symbol prints as that symbol (N, mm). A coefficient greater than 1 prints after | (L | 100 km, 1 | 100 s).

same?/2 compares monomials and per. convertible?/3 takes a catalog and is true when both units have the same dimension vector (m and km of :length), ignoring per. compatible?/3 maps a unit monomial to a category formula and compares it to a category (cm | s vs :speed), also ignoring per.

Fields

• :monomial - A map of symbols to integer exponents
• :per - A positive integer denominator coefficient, default 1

Examples

%Elex.Unit{monomial: %{"m" => 1}}
%Elex.Unit{monomial: %{"m" => 1, "s" => -1}}
%Elex.Unit{monomial: %{"L" => 1, "km" => -1}, per: 100}