Description

To avoid heavy nesting, add a pipe operator |> which allow to chain expression together

The 2 following expression are totally equivalent

Without

a = List.sort(List.map(List.filter([1,2,4,5,6], (val) => val < 5), (val) => 10 / val))

• Can lead to long expression, hard to read
• Can be hard to know how many parentheses are needed at the end of the line
• Hard to see which lambda is used by which function

With Pipe |>

a = [1,2,4,5,6]
  |> List.filter($, (val) => val < 5)
  |> List.map($, (val) => 10 / val)
  |> List.sort($)

• the $ is used as the replacement to the result of the previous Expression in the chain (compatible with any existing function)
• more verbose but each expression is now separated and easier to read
• a will be = to the result of the last line