To come up with a functioning MongoDB query that determines whether a user is part of a group requires an understanding of how you’re structuring your database and groups collection. One way to structure that is like so: { “_id” : ObjectId(“594ea5bc4be3b65eeb8705d8”), “group_name”: “…”, “group_members”: [ { “user_id”: ObjectId(“<same one from users collection”), “user_name”: “Alice”, … Read more
I don’t understand your document structure at all… and the only “user” array I could find in here was a field called “3”. Your code does in fact work and appends a document into the “3” array. The below is the result after running your code. Perhaps you could be more clear as to what … Read more
The best resource on python is docs.python.org, it has the CPython reference, other than that it’s mostly learning the syntax, which is gonna be a little different than ruby, but is pretty simple to master. Any of the online tutorials should give you syntactic examples. If you have specific questions, ask those here. One tip, … Read more
You can put the array through Array.protoype.map, which replaces each value in the array with whatever the callback function returns. In the callback function you can return an array version of the object. For example: var result = yourArray.map(function (item) { return [item.text, item.count]; }); More array methods can be found on the MDN docs … Read more
You need to write a backend API that will be used by your frontend/desktop application. The technology you use is up to you – it can be Node, Python, Ruby, Java, Go, Lua, Perl or even C. If you use Node then you can use Express, if you use Python then you can use Django, … Read more