I have data like this

[{"name": "swimming"},{"name": "Politics"},{"name": "Gamer"}]

and I have profiles like

[
   {
      "username":"abc",
      "passions":[
         {
            "name":"Snooker"
         }
      ]
   },
   {
      "username":"abc",
      "passions":[
         {
            "name":"Coding"
         }
      ]
   },
   {
      "username":"xyz",
      "passions":[
         {
            "name":"swimming"
         }
      ]
   },
   {
      "username":"abc",
      "passions":[
         {
            "name":"Politics"
         },
         {
            "name":"swimming"
         }
      ]
   }
]

What I need to do is show first those profiles whose passions are matching with that first data array and then the other rest remaining will show.

CodePudding user response：

I'm sure there are better ways to do this, but this works.

  final passions = [{"name": "swimming"},{"name": "Politics"},{"name": "Gamer"}];
  
  final users = 
[
   {
      "username":"abc",
      "passions":[
         {
            "name":"Snooker"
         }
      ]
   },
   {
      "username":"efg",
      "passions":[
         {
            "name":"Coding"
         }
      ]
   },
   {
      "username":"hij",
      "passions":[
         {
            "name":"swimming"
         }
      ]
   },
   {
      "username":"klm",
      "passions":[
         {
            "name":"Politics"
         },
         {
            "name":"swimming"
         }
      ]
   }
];
  
  var matches = [];
  
  users.forEach((u) {
    passions.forEach((p) {
      if (p['name'] == (u['passions'] as List)[0]['name']) {
        matches.add(u['username']);
      }
    });
  });
  
  print(matches.toString());

CodePudding user response：

Just give this function a profile list and Finally returns the sort list

  List passions = [{"name": "swimming"}, {"name": "Politics"}, {"name": "Gamer"} ];

  List sortListPrfile(List profiles) {
    //profiles is a list of result server
    List _items = []; // It will be returned eventually
    List _noItemCommon = []; //Items that are not common
    for (var profile in profiles) {
      for (var passion in passions) {
        if (profile["passions"][0]["name"] == passion['name']) {
          _items.add(profile);
        } else {
          _noItemCommon.add(profile);
        }
      }
    }
    _items.addAll(_noItemCommon);
    return _items;
  }