{{alias}}( predicate, fcn[, thisArg] )
    Invokes a function while a test condition is true.

    When invoked, both the predicate function and the function to invoke are
    provided a single argument:

    - `i`: iteration number (starting from zero)

    Parameters
    ----------
    predicate: Function
        The predicate function which indicates whether to continue invoking a
        function.

    fcn: Function
        The function to invoke.

    thisArg: any (optional)
        Execution context for the invoked function.

    Examples
    --------
    > function predicate( i ) { return ( i < 5 ); };
    > function beep( i ) { console.log( 'boop: %d', i ); };
    > {{alias}}( predicate, beep )
    boop: 0
    boop: 1
    boop: 2
    boop: 3
    boop: 4

    See Also
    --------