[javascript] How is a JavaScript hash map implemented?

Should you try this class Map:

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var myMap = new Map();_x000D_
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// setting the values_x000D_
myMap.set("1", 'value1');_x000D_
myMap.set("2", 'value2');_x000D_
myMap.set("3", 'value3');_x000D_
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myMap.size; // 3_x000D_
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// getting the values_x000D_
myMap.get("1");    // "value associated with "value1"_x000D_
myMap.get("2");       // "value associated with "value1"_x000D_
myMap.get("3");      // "value associated with "value3"
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Notice: key and value can be any type.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map

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