हाँ, एक प्रश्न होगा:
var searchKeywords = ['a','b','c','d']
MyCollection = new Mongo.Collection('mycollection');
MyCollection.insert({
keywords: ['x','y','a','b']
});
// returns some ID
MyCollection.findOne({
keywords: { $in: searchKeywords }
})._id
// returns the same ID