按数组下划线JS过滤数组

Question

I'm trying to filter out "Players" by their TeamID which is an array, based on the selected checkboxes in a multi-select ( Bootstrap Multiselect to be precise ).

I had it working but the requirements changed and players can be in multiple teams. (I'm sorry I have no JSFiddle / CodePen, Bootstrap Multiselect has no CDN and both of them aren't playing nice)

This is what I had for individual teams which worked.

var temp = [];

_.each(selected, function(i){
            temp.push(_.filter(allPlayers, function(obj){
                return obj.TeamID == i;
            }));
});

However I need to filter an array by an array.

JSON

var allPlayers = [{
     "TeamID": [100001, 100002],
     "PlayerID": 1,
     "PlayerName" : "Pete Tong"
    },
    {
     "TeamID": [100001, 100002],
     "PlayerID": 2,
     "PlayerName" : "Will Chamberlain"
    },
    {
     "TeamID": [100002, 100003],
     "PlayerID": 3,
     "PlayerName" : "Jane Doe"
    },
    {
     "TeamID": [100004],
     "PlayerID": 4,
     "PlayerName" : "John Doe"
}];

I've tried Filter two different structured arrays underscore js but it doesn't seem to work for my solution.

Selected Array

 var teams = $('#team-list option:selected');
 var selected = [];

 $(teams).each(function(index, team){
        selected.push($(this).val());
 });

Answer 1

This should work:

var temp = [];

_.each(selected, function(i){
            temp.push(_.filter(allPlayers, function(obj){
                return obj.TeamID.indexOf(i) !== -1;
            }));
});

Rather than comparing if the TeamID equals the selected id, you can check if the TeamID array contains the selected id.

Answer 2

if you use filter(), you don't need an extra outside variable:

var allPlayers = [{
     "TeamID": [100001, 100002],
     "PlayerID": 1,
     "PlayerName" : "Pete Tong"
    },
    {
     "TeamID": [100001, 100002],
     "PlayerID": 2,
     "PlayerName" : "Will Chamberlain"
    },
    {
     "TeamID": [100002, 100003],
     "PlayerID": 3,
     "PlayerName" : "Jane Doe"
    },
    {
     "TeamID": [100004],
     "PlayerID": 4,
     "PlayerName" : "John Doe"
}];



var selected=[100003, 100004]; // change this 

var filtered= allPlayers.filter(function(a){
    return selected.some(function(team){
      return a.TeamID.indexOf(team)!==-1;
    });
});

alert(JSON.stringify(filtered, null, "\t"));

demo: http://pagedemos.com/qejbsz722hs3/2

edit: added many to many searching.