Index of first unique values
Description
This finds the position of first occurrence of each unique value.
Usage
<Expr>$arg_unique()
Value
Expr
Examples
#> shape: (3, 1)
#> ┌─────┐
#> │ │
#> │ --- │
#> │ u32 │
#> ╞═════╡
#> │ 0 │
#> │ 1 │
#> │ 4 │
#> └─────┘