aureooms/js-max-gap

import { iter , reduce } from '@aureooms/js-itertools' ;

export function from_sorted ( numbers ) {

    const it = iter( numbers ) ;

    const e = it.next( ) ;

    if ( e.done ) return -1 ;

    const f = e.value ;

    return reduce( ( [ p , g ] , x ) => [ x , Math.max( g , x - p ) ] , it , [ f , -1 ] )[1] ;

}