Preserving Insertion Order in Java Collections and Querying MongoDB with Java
When working with data collections and databases, maintaining the correct order and efficiently querying your data are crucial. Recently, I faced two common issues: querying for a specific array element in MongoDB and preserving insertion order when converting a stream to a set in Java. Let’s dive into how to solve these problems. Querying for the First Element in a MongoDB Array In MongoDB, you might need to query a document to check if a specific value is the first element in an array. This can be achieved with a simple query, without needing the $elemMatch operator. Here’s how you can do it: ...