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Define an unmodifiable empty map
/* It's not possible to define an array as a constant
* Instead we can use the serialize-function */
$fruits = array("apple", "banana", "orange");
define("FRUITS", serialize($fruits));
echo FRUITS; // a:3:{i:0;s:5:"apple";i:1;s:6:"banana";i:2;s:6:"orange";}
$my_fruits = unserialize(FRUITS); // and normal array again
* Instead we can use the serialize-function */
$fruits = array("apple", "banana", "orange");
define("FRUITS", serialize($fruits));
echo FRUITS; // a:3:{i:0;s:5:"apple";i:1;s:6:"banana";i:2;s:6:"orange";}
$my_fruits = unserialize(FRUITS); // and normal array again
% Erlang data structures are immutable - updating a 'map' sees a modified copy created
Map = dict:new(),
; Clojure maps are immutable
(def m {})
(def m {})
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