(PECL ds >= 1.0.0)
Ds\Map::__construct — Creates a new instance.
Creates a new instance, using either a traversable
object or an array for the initial values.
valuesA traversable object or an array to use for the initial values.
Example #1 Ds\Map::__construct() example
<?php
$map = new \Ds\Map();
var_dump($map);
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
var_dump($map);
?>
以上例程的输出类似于：
object(Ds\Map)#1 (0) {
}
object(Ds\Map)#2 (3) {
[0]=>
object(Ds\Pair)#1 (2) {
["key"]=>
string(1) "a"
["value"]=>
int(1)
}
[1]=>
object(Ds\Pair)#3 (2) {
["key"]=>
string(1) "b"
["value"]=>
int(2)
}
[2]=>
object(Ds\Pair)#4 (2) {
["key"]=>
string(1) "c"
["value"]=>
int(3)
}
}