daft.functions.ascii_func#

def ascii_func(expr: Expression) -> Expression:
    """Returns the ASCII numeric value of the first character of the string.

    Returns 0 for empty strings. This is compatible with Spark's ascii function.

    Args:
        expr: The string expression

    Returns:
        Expression: an Int32 expression with the ASCII value

    Examples:
        >>> import daft
        >>> from daft.functions import ascii_func
        >>> df = daft.from_pydict({"x": ["A", "abc", ""]})
        >>> df = df.select(ascii_func(df["x"]))
        >>> df.show()
        ╭───────╮
        │ x     │
        │ ---   │
        │ Int32 │
        ╞═══════╡
        │ 65    │
        ├╌╌╌╌╌╌╌┤
        │ 97    │
        ├╌╌╌╌╌╌╌┤
        │ 0     │
        ╰───────╯
        <BLANKLINE>
        (Showing first 3 of 3 rows)

    """
    return Expression._call_builtin_scalar_fn("ascii", expr)