Script map : Manipulation d'un dictionnaire Map

<h1>Manipulation de dictionnaire Map</h1><script type="text/javascript">var dic = new Map([ ["acer", "érable"], ["quercus", "chêne"] ]);console.log(dic.size); // 3console.log(dic);      // Map(2) {"acer" => "érable", "quercus" => "chêne"}dic.set("malus", "pommier");dic.set("fagus", "hêtre");console.log(dic.get("malus"));    // pommierconsole.log(dic.has("populus"));  // falseconsole.log(dic.get("populus"));  // undefinedconsole.group("dic.forEach()");dic.forEach(function(valeur, cle) {  console.log(cle + " : " + valeur);});console.groupEnd();</script>