Rewriting Javascript Objects to Dart Maps/Lists

Question

I'm trying to convert the following javascript object to a Dart map:

var users = { 
    1 : {
      first_name: 'James',
      last_name: 'Smith',
      email: '[email protected]',
    },
    2 : {
      first_name: 'Robin',
      last_name: 'Doe',
      email: '[email protected]',
    }

I've tried:

var users = { 
    "1" : {
      first_name: 'James',
      last_name: 'Smith',
      email: '[email protected]',
    },
    "2" : {
      first_name: 'Robin',
      last_name: 'Doe',
      email: '[email protected]',
    }

but I'm unable to use it as a map with the numbers in quotes or without(throws errors).

var keys = users.getKeys(); //NoSuchMethodError : method not found: 'getKeys'
assert(keys.length == 2);
assert(new Set.from(keys).contains('2'));

Juan Mellado · Accepted Answer · 2012-12-16 19:46:06Z

5

Use (single or double) quotes for attribute names:

var users = {
   "1" : {
     "first_name": "James",
     "last_name": "Smith",
     "email": "[email protected]",
   },
   "2" : {
     "first_name": "Robin",
     "last_name": "Doe",
     "email": "[email protected]"
   }
 };

Also, getKeys method does not exists, use keys instead:

 var keys = users.keys;
 assert(keys.length == 2);
 assert(keys.contains("2"));
 assert(users["1"]["first_name"] == "James");

answered Dec 16, 2012 at 19:46

Juan Mellado

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