Struct MapNameSpace 

pub struct MapNameSpace(/* private fields */);

Available on crate feature lazy only.

Specialized expressions for DataType::Map.

Implementations

impl MapNameSpace

pub fn entries(self) -> Expr

Convert this Map to a List of Struct {key, value} entries.

Null maps remain null.

pub fn keys(self) -> Expr

Get the keys of every map as a List, in entry order.

Null maps remain null.

pub fn values(self) -> Expr

Get the values of every map as a List, in entry order.

Null maps remain null.

pub fn len(self) -> Expr

Get the number of entries of every map.

Null maps remain null.

pub fn contains_key(self, key: Expr) -> Expr

Check whether every map holds key.

Null maps remain null. Map keys are never null, so a null key is never found.

pub fn get(self, key: Expr) -> Expr

Look up key in every map, returning the map’s value dtype.

Maps that do not hold key yield null, as do null maps. Map keys are never null, so a null key is never found.