题目：
The objective of ‘Duck, duck, goose‘ is to walk in a circle, tapping on each player‘s head until one is finally chosen.
Task: Given an array of Player objects (an array of associative arrays in PHP) and an index (1-based), return the name of the chosen Player.
Example:
duck_duck_goose([a, b, c, d], 1) should return a.name
duck_duck_goose([a, b, c, d], 5) should return a.name
duck_duck_goose([a, b, c, d], 4) should return d.name
// PHP only
duck_duck_goose([$a, $b, $c, $d], 1); // => $a["name"]
duck_duck_goose([$a, $b, $c, $d], 5); // => $a["name"]
duck_duck_goose([$a, $b, $c, $d], 4); // => $d["name"]
答案：
原文：http://www.cnblogs.com/tong24/p/7306274.html