Function polars::functions::concat_str

pub fn concat_str(
    s: &[Series], 
    delimiter: &str
) -> Result<ChunkedArray<Utf8Type>, PolarsError>

This is supported on crate feature concat_str only.

Casts all series to string data and will concat them in linear time. The concatenated strings are separated by a delimiter. If no delimiter is needed, an empty &str should be passed as argument.