Map

  • construct()

    Returns and empty map

    Example: new Map() //Map {}

  • contains(key)

    Returns whether key is in the map

    Example 

    let map = Map{}
map.contains(2) //false

  • remove(key)

    Removes the key from the map. Throws KeyError if the key is not present

    Example

    let map = Map{1:2,2:3}
map.remove(1)
map //Map{2:3}

  • clear() Removes all keys from the map

    Example

    let map = Map{1:2,2:3}
map.clear()
map //Map{}

  • len()

    Returns the number of keys in the map

    Example

    let map = Map{1:2,2:3}
map.len() //2

  • keys()

    Returns an iterator to the keys of the map

    Example

    let map = Map{1:2,2:3}
map.keys().collect() //[1,2]