Function frame_support::storage::child::take_or_else

source · [−]
pub fn take_or_else<T: Codec + Sized, F: FnOnce() -> T>(
    child_info: &ChildInfo, 
    key: &[u8], 
    default_value: F
) -> T
Expand description

Return the value of the item in storage under key, or default_value() if there is no explicit entry. Ensure there is no explicit entry on return.