{{alias}}( obj, predicate )
    Returns a partial object copy containing properties for which a predicate
    returns a truthy value.

    Parameters
    ----------
    obj: Object
        Source object.

    predicate: Function
        Predicate function.

    Returns
    -------
    out: Object
        New object.

    Examples
    --------
    > function predicate( key, value ) {
    ...     return ( value > 1 );
    ... };
    > var obj1 = { 'a': 1, 'b': 2 };
    > var obj2 = {{alias}}( obj1, predicate )
    { 'b': 2 }

    See Also
    --------