Struct stdweb::Object

pub struct Object(_);

A type representing a JavaScript object.

Methods

impl Object

pub fn len(&self) -> usize

Returns the number of elements in this particular object.

pub fn to_iter(&self) -> impl ExactSizeIterator<Item = (String, Value)>

Retrieves an iterator over this object's keys and values.

When called, this method will pull all the objecy's keys and values from JavaScript, then return an iterator which accesses them in pairs.

Example:

use stdweb::{ js, unstable::TryInto, Object };

let obj: Object = js!( return { [1]: 2 } ).try_into()?;

let map: HashMap< i32, i32 > = obj
    .to_iter()
    .map( |(k, v)| Ok( ( k.parse()?, v.try_into()? ) ) )
    .collect::< Result< _, Box< dyn std::error::Error > > >()?;

assert_eq!( map[ &1 ], 2 );
panic!("ahhh");

Trait Implementations

impl JsSerialize for Object

impl<K, V> TryFrom<BTreeMap<K, V>> for Object where
    K: AsRef<str>,
    V: JsSerialize, 

type Error = Void

The type returned in the event of a conversion error.

fn try_from(source: BTreeMap<K, V>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a, K, V> TryFrom<&'a BTreeMap<K, V>> for Object where
    K: AsRef<str>,
    V: JsSerialize, 

type Error = Void

The type returned in the event of a conversion error.

fn try_from(source: &'a BTreeMap<K, V>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a, K, V> TryFrom<&'a mut BTreeMap<K, V>> for Object where
    K: AsRef<str>,
    V: JsSerialize, 

type Error = Void

The type returned in the event of a conversion error.

fn try_from(source: &'a mut BTreeMap<K, V>) -> Result<Self, Self::Error>

Performs the conversion.

impl<K, V> TryFrom<HashMap<K, V, RandomState>> for Object where
    K: AsRef<str> + Eq + Hash,
    V: JsSerialize, 

type Error = Void

The type returned in the event of a conversion error.

fn try_from(source: HashMap<K, V>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a, K, V> TryFrom<&'a HashMap<K, V, RandomState>> for Object where
    K: AsRef<str> + Eq + Hash,
    V: JsSerialize, 

type Error = Void

The type returned in the event of a conversion error.

fn try_from(source: &'a HashMap<K, V>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a, K, V> TryFrom<&'a mut HashMap<K, V, RandomState>> for Object where
    K: AsRef<str> + Eq + Hash,
    V: JsSerialize, 

type Error = Void

The type returned in the event of a conversion error.

fn try_from(source: &'a mut HashMap<K, V>) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Object> for Reference

type Error = Void

The type returned in the event of a conversion error.

fn try_from(value: Object) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Reference> for Object

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(reference: Reference) -> Result<Self, Self::Error>

Performs the conversion.

impl<'_r> TryFrom<&'_r Reference> for Object

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(reference: &Reference) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for Object

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl<'_r> TryFrom<&'_r Value> for Object

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: &Value) -> Result<Self, Self::Error>

Performs the conversion.

impl<E: Into<ConversionError>, V: TryFrom<Value, Error = E>> TryFrom<Object> for BTreeMap<String, V>

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(object: Object) -> Result<Self, Self::Error>

Performs the conversion.

impl<E: Into<ConversionError>, V: TryFrom<Value, Error = E>> TryFrom<Object> for HashMap<String, V>

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(object: Object) -> Result<Self, Self::Error>

Performs the conversion.

impl InstanceOf for Object

fn instance_of(reference: &Reference) -> bool

Checks whenever a given Reference if of type Self.

impl ReferenceType for Object

unsafe fn from_reference_unchecked(reference: Reference) -> Self

Converts a given reference into a concrete reference-like wrapper. Doesn't do any type checking; highly unsafe to use!

impl AsRef<Reference> for Object

fn as_ref(&self) -> &Reference

Performs the conversion.

impl From<Object> for Reference

fn from(value: Object) -> Self

Performs the conversion.

impl From<Object> for BTreeMap<String, Value>

fn from(object: Object) -> Self

Performs the conversion.

impl<'a> From<&'a Object> for BTreeMap<String, Value>

fn from(object: &'a Object) -> Self

Performs the conversion.

impl<'a> From<&'a mut Object> for BTreeMap<String, Value>

fn from(object: &'a mut Object) -> Self

Performs the conversion.

impl From<Object> for HashMap<String, Value>

fn from(object: Object) -> Self

Performs the conversion.

impl<'a> From<&'a Object> for HashMap<String, Value>

fn from(object: &'a Object) -> Self

Performs the conversion.

impl<'a> From<&'a mut Object> for HashMap<String, Value>

fn from(object: &'a mut Object) -> Self

Performs the conversion.

impl<K: AsRef<str>, V: JsSerialize> From<BTreeMap<K, V>> for Object

fn from(value: BTreeMap<K, V>) -> Self

Performs the conversion.

impl<'a, K, V> From<&'a BTreeMap<K, V>> for Object where
    K: AsRef<str>,
    V: JsSerialize, 

fn from(value: &'a BTreeMap<K, V>) -> Self

Performs the conversion.

impl<'a, K, V> From<&'a mut BTreeMap<K, V>> for Object where
    K: AsRef<str>,
    V: JsSerialize, 

fn from(value: &'a mut BTreeMap<K, V>) -> Self

Performs the conversion.

impl<K, V> From<HashMap<K, V, RandomState>> for Object where
    K: AsRef<str> + Hash + Eq,
    V: JsSerialize, 

fn from(value: HashMap<K, V>) -> Self

Performs the conversion.

impl<'a, K, V> From<&'a HashMap<K, V, RandomState>> for Object where
    K: AsRef<str> + Hash + Eq,
    V: JsSerialize, 

fn from(value: &'a HashMap<K, V>) -> Self

Performs the conversion.

impl<'a, K: Hash + Eq, V> From<&'a mut HashMap<K, V, RandomState>> for Object where
    K: AsRef<str>,
    V: JsSerialize, 

fn from(value: &'a mut HashMap<K, V>) -> Self

Performs the conversion.

impl Clone for Object

fn clone(&self) -> Object

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Eq for Object

impl PartialEq<Object> for Object

fn eq(&self, other: &Object) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Object) -> bool

This method tests for !=.

impl Debug for Object

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.