repl.txt

{{alias}}( x )
    Returns an accessor function for retrieving an element from an array-like
    object.

    An accessor function accepts the following arguments:

    - arr: input array.
    - idx: element index.

    If provided an array-like object having an unsupported data type, the
    function returns a default accessor function for accessing elements from
    any indexed array-like object.

    Otherwise, the function returns an accessor function which should *only* be
    provided an array instance having the same data type (e.g., if provided a
    Float64Array, the returned accessor function should only be provided
    instances of Float64Array).

    Accessor functions do *not* verify that provided input arrays are array
    instances having a specific data type, as doing so would introduce
    performance overhead. If array instances corresponding to other data types
    are provided to an accessor function, JavaScript runtimes will consider the
    function polymorphic, potentially triggering de-optimization. In order to
    ensure maximum performance, *always* ensure that an accessor function is
    monomorphic.

    Accessor functions do *not* perform bounds checking.

    Accessor functions do *not* verify that provided input arrays implement the
    get/set protocol.

    Parameters
    ----------
    x: ArrayLikeObject
        Input array.

    Returns
    -------
    f: Function
        Accessor function.

    Examples
    --------
    > var f = {{alias}}( [ 5, 6, 7, 8 ] );
    > var v = f( [ 1, 2, 3, 4 ], 2 )
    3

    See Also
    --------