(PECL ds >= 1.0.0)
Ds\Set::join — Joins all values together as a string
Joins all values together as a string using an optional separator between each value.
glueAn optional string to separate each value.
All values of the set joined together as a string.
示例 #1 Ds\Set::join() example using a separator string
<?php
$set = new \Ds\Set(["a", "b", "c", 1, 2, 3]);
var_dump($set->join("|"));
?>以上示例的输出类似于：
string(11) "a|b|c|1|2|3"
示例 #2 Ds\Set::join() example without a separator string
<?php
$set = new \Ds\Set(["a", "b", "c", 1, 2, 3]);
var_dump($set->join());
?>以上示例的输出类似于：
string(11) "abc123"