Convert a string to lowercase

Description

Transform to lowercase variant.

Usage

<Expr>$str$to_lowercase()

Value

A polars expression

Examples

library("polars")

pl$select(
  pl$lit(c("A", "b", "c", "1", NA))$str$to_lowercase()
)$to_series()

#> shape: (5,)
#> Series: 'literal' [str]
#> [
#>  "a"
#>  "b"
#>  "c"
#>  "1"
#>  null
#> ]