Option::filter

pub fn filter(T -> bool pred) -> Option<T>

This option if its value passes pred, otherwise None.

Called on a Option value as value.filter(…).

Parameters#

Returns#

Option<T>

See also#

• Option
• Option::is_some: True when this is Some.
• Option::is_none: True when this is None.
• Option::unwrap_or: The value, or fallback when None.
• Option::unwrap_or_else: The value, or the result of f when None.
• Option::map: Some(f(value)), or None.
• Option::map_or: f(value), or fallback when None.
• Option::and_then: f(value) (itself an Option), or None.