Display all authors and their only one latest post

In @Sagive SEO answer get_users_of_blog() is a depricated function.

What is below code do

1. get all authors display name and id in $authorsList

2. Loop threw each author id and use WP_Query to get latest post of each author

      <?php
       $authors=get_users();
       $i=0;
       //get all users list
       foreach($authors as $author){
           $authorList[$i]['id']=$author->data->ID;
           $authorList[$i]['name']=$author->data->display_name;
           $i++;
       }
       ?>
       <ul>
           <?php 
           foreach($authorList as $author){
               $args=array(
                       'showposts'=>1,
                       'author'=>$author['id'],
                       'caller_get_posts'=>1
                      );
               $query = new WP_Query($args);
               if($query->have_posts() ) {
                   while ($query->have_posts()){
                       $query->the_post();
           ?>
           <li>
            <h2><?php echo $author['name']; ?></h2>
            <a href="https://wordpress.stackexchange.com/questions/63060/<?php echo get_permalink(); ?>"> <?php echo get_the_title(); ?> </a>
           </li>
           <?php
                   }
                   wp_reset_postdata();
               }
           }
           ?>
       </ul>
   

Important Link:

get_users()