Trait agnes::access::DataIndex

pub trait DataIndex<DTypes>: Debug where
    DTypes: DTypeList, {
    type DType: DataType<DTypes>;
    fn get_datum(&self, idx: usize) -> Result<Value<&Self::DType>>;
    fn len(&self) -> usize;

    fn is_empty(&self) -> bool { ... }
    fn iter(&self) -> DataIterator<DTypes, Self::DType>
    where
        Self: Sized,
    { ... }
}

Trait that provides access to values in a data field.

Associated Types

type DType: DataType<DTypes>

The data type contained within this field.

Required Methods

fn get_datum(&self, idx: usize) -> Result<Value<&Self::DType>>

Returns the data (possibly NA) at the specified index, if it exists.

fn len(&self) -> usize

Returns the length of this data field.

Provided Methods

fn is_empty(&self) -> bool

Returns whether or not this field is empty.

Important traits for DataIterator<'a, DTypes, T>

impl<'a, DTypes, T> Iterator for DataIterator<'a, DTypes, T> where
    DTypes: DTypeList,
    T: 'a + DataType<DTypes>,  type Item = Value<&'a T>;

fn iter(&self) -> DataIterator<DTypes, Self::DType> where
    Self: Sized, 

Returns an iterator over the values in this field.

Implementors

• impl<DTypes, T> DataIndex<DTypes> for FieldData<DTypes, T> where     DTypes: DTypeList,     T: DataType<DTypes>,  type DType = T;

• impl<'a, 'b, DI, R, DTypes> DataIndex<DTypes> for Reindexed<'a, 'b, R, DI> where     DTypes: DTypeList,     R: 'a + Reindexer<DTypes>,     DI: 'b + DataIndex<DTypes>,  type DType = DI::DType;

• impl<'a, DTypes, T> DataIndex<DTypes> for Framed<'a, DTypes, T> where     T: DataType<DTypes>,     DTypes: DTypeList,     DTypes::Storage: MaxLen<DTypes>,  type DType = T;

• impl<'a, DTypes, T> DataIndex<DTypes> for OwnedOrRef<'a, DTypes, T> where     DTypes: DTypeList,     T: 'a + DataType<DTypes>,  type DType = T;

• impl<DTypes, U, T> DataIndex<DTypes> for Selection<DTypes, U, T> where     DTypes: DTypeList,     T: DataType<DTypes>,     U: DataIndex<DTypes, DType = T>,  type DType = T;