循环在MongoDB中不起作用

Question

I wrote script for search anagrams in my Mongo database:

print("Search anagrams");

var input = db.dbName.find();
var i = 0;

input.forEach(function(word) {
    var j = 0;
    var alphabetical = word.name.split("").sort().join("");

    input.forEach(function(worter) {
        if (i != j) {
            if (alphabetical == worter.name.split("").sort().join("")) {
                print(word.name + " : " + worter + " - " + i + ", " + j);
            }
        }
        j++;
    });
    i++;
});

but the first loop doesn't work. Do you have any idea why? Sample record from db:

{ "_id" : ObjectId("5491d807dacc815b3043ae24"), "name" : "monki" }

Answer 1

db.dbName.find() 

return cursor. It is not array. You iterate through cursor two times (outer loop and inner loop), and this may be a problem. Check if this work

input.forEach(function(word) {
 console.log(word);
}