arrays - How to create dynamic Map key in javascript? -


I have tried to create a map like the example below ... 

  Var myMap = {"one": 1, "two": "two", "three": 3.0};   
 Therefore, I repeat them to:   (code of myMap) for {my>} {window.alert ("myMapmap property \ "" + Key + "\" = "+ map [key]); }   
 If my data is  dynamic  ... and I want to add each of them to the map ... how should the code be? And I hope the key is not stable ... I mean the data taken from other sources like the database, which was not previously defined.  
  
 
 
 
 
 
 
  var data source = ...; Whereas (var o = dataSource.get ()) {myMap [o.key] = o.value; } (Var key in myMap) {alert ("key:" + "value:" + myMap [key]); }   
 You can just type the object using an array such as syntax.  
 How and where you can get your data

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