[grndn]

Here is the history of the |> symbol as best as I can tell:

1994: Isabelle/ML (part of Isabelle proof assistant tooling) (https://blogs.msdn.microsoft.com/dsyme/2011/05/17/archeologi...)

2005 and earlier: F#

2012: Elm

2013: Elixir (https://github.com/elixir-lang/elixir/pull/751)

2013: OCaml (https://ocaml.org/releases/4.01.0.html)

[aetherspawn]

Haskell has had the dot (.) operator which does the same thing for probably longer, but I have no reference sorry. Haskell is >30 years old.

[yorwba]

Dot has the arguments swapped.

  f |> g = g . f

[scns]

The $-operator is Haskell's equivalent to |>