# Ds\Map::__construct

(PECL ds >= 1.0.0)

Ds\Map::__construct — Creates a new instance

### 说明

public Ds\Map::__construct(mixed `...$values`)

Creates a new instance, using either a traversable object or an array for the initial `values`.

### 参数

`values`

  A traversable object or an array to use for the initial values.

### 示例

示例 #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);
?>`

以上示例的输出类似于：

    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)
      }
    }

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