PHP Ds Map diff()用法及代码示例

Ds\Map::diff() 函数可以使用不在另一个Map中的键创建新Map。

用法

public Ds\Map Ds\Map::diff( Ds\Map $map )

Ds\Map::diff() 函数可以返回从当前实例中删除给定映射中存在的所有键的结果。

例子1

<?php  
   $map1 = new \Ds\Map(["1" => "10", "2" => 20, "3" => 30]);               
   $map2 = new \Ds\Map(["3" => "30", "4" => 40, "5" => 50]);
  
   echo "The difference between two maps:<br>";
   print_r($map1 -> diff($map2)); 
?>

例子2

<?php  
   $map1 = new \Ds\Map(["1" => "Tutorials", "2" => "Point", "3" => "India"]);          
   $map2 = new \Ds\Map([ 2" => "Point", "3" => "Tutorials", "4" => "Tutorix"]); 
  
   echo "The difference between two maps:<br>"; 
   print_r($map1 -> diff($map2)); 
?>