Expressions And Operators: Pipe
The binary pipe operator,
|>, evaluates the result of a left-hand expression and stores the result in
$$, the pre-defined pipe variable. The right-hand expression must contain at least one occurrence of
With the pipe operator, you can chain function calls, as shown in the code below.
$x = vec[2,1,3] |> Vec\map($$, $a ==> $a * $a) // $$ with value vec[2,1,3] |> Vec\sort($$); // $$ with value vec[4,1,9]
Written in another way, the code above is syntactically equivalent to:
Vec\sort(Vec\map(vec[2, 1, 3], $a ==> $a * $a)) // Evaluates to vec[1,4,9]
Await cannot be used as an expression to the right of the pipe operator.