// declare regular array (capacity doesn't matter so much)float foo[4]; // use as int-based array2.5 => foo[0]; // use as associative array with key "yoyo"4.0 => foo["yoyo"]; // access as associative (print)<<< foo["yoyo"] >>>; // access empty element<<< foo["gaga"] >>>;  // -> should print 0.0 // add a second associative element44.0 => foo["yiyi"]; // get the array keys with all of the keys in the arraystring keys[0];foo.getKeys(keys); <<< keys[0], keys[1] >>>; // call .help() on an array to get more information about its type, methods, etc.// foo.help();