How can we query arrays containing in-memory JavaScript objects using mongo-style syntax, rather than querying Mongo collections?

If I can construct a query in MongoDB to return objects with height not equal to 4 from a collection like this:

var mongoQuery = { height: { "$ne": 4 } };

Is there a way to apply a similar query logic to an in-memory array of objects using existing libraries or methods? For example:

var myArr = [{height: 5}, {height: 4}, {height:3}]

Are there any tools available that allow me to use MongoDB-like syntax on arrays instead of database collections? Such as:

var result = someUtil(myArr, {height: {"$ne": 4}});  //returns all objects with height != 4

Clarification: I am looking for a solution that can translate various MongoDB operators, not just "!=" (not equal).

Answer №1

For those looking for mongodb-like queries, consider checking out sift.js. It might be the perfect tool for you. However, if your needs are simpler, libraries like lodash or underscore could be better suited.

Answer №2

Explore the choices available to you:

  • minimongo - A fork of Meteor.js minimongo designed for NPM
  • nedb - A JavaScript-based embedded database for Node.js, Electron, and browsers
  • sift.js - Utilize Mongodb queries in plain JavaScript
  • mingo - Implement MongoDB query language for working with in-memory objects

Each library offers unique advantages and disadvantages such as indexing or aggregation capabilities, so it is important to carefully evaluate your options based on your specific requirements.

Answer №3

Explore the underscore JavaScript library.

var output = _.find(myArr, function(item){ return item.height == 4 });

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