Think of it as unix pipes. F# uses the exact same notation and in fact in F# the |> notation is now more prevalent than "regular" function application notation because if read left to right instead right to left.
You could also think of it a one special case of the monadic (oops! I said the m-word) >>= operator in Haskell. On Sunday, September 20, 2015 at 11:08:59 AM UTC+2, Daniel Carrera wrote: > > Looking at the code examples from Gtk.jl I found this code example: > > w = Gtk.@Window() |> > (f = Gtk.@Box(:h) |> > (b = Gtk.@Button("1")) |> > (c = Gtk.@Button("2")) |> > (f2 = Gtk.@Box(:v) |> > Gtk.@Label("3") |> > Gtk.@Label("4"))) |> > showall > > > This is just a compact way to create a Gtk window and put some objects in > it. But I had never seen that `|>` operator before, and I can't figure out > what it's doing. Is this operator somehow unique to Gtk.jl ? It can see > that they use it to nest widgets inside containers, but it's not clear to > me how it does it. > > Cheers, > Daniel. >