Apply logical AND on a column

Description

Check if all values in a Boolean column are TRUE. This method is an expression - not to be confused with pl$all() which is a function to select all columns.

Usage

<Expr>$all(drop_nulls = TRUE)

Arguments

drop_nulls Logical. Default TRUE, as name says.

Value

Boolean literal

Examples

library(polars)

pl$DataFrame(
  all = c(TRUE, TRUE),
  any = c(TRUE, FALSE),
  none = c(FALSE, FALSE)
)$select(
  # the first $all() selects all columns, the second one applies the AND
  # logical on the values
  pl$all()$all()
)

#> shape: (1, 3)
#> ┌──────┬───────┬───────┐
#> │ all  ┆ any   ┆ none  │
#> │ ---  ┆ ---   ┆ ---   │
#> │ bool ┆ bool  ┆ bool  │
#> ╞══════╪═══════╪═══════╡
#> │ true ┆ false ┆ false │
#> └──────┴───────┴───────┘