How to efficiently merge and sort two large arrays in Ruby without excessive memory usage?
I've been struggling with this for a few days now and could really use some help... I've been researching this but I'm a bit lost with I'm working on a Ruby script that needs to merge and sort two large arrays of integers..... The arrays can each contain up to 10 million elements, which raises concerns about memory usage and performance. I initially tried using the `Array#concat` method followed by `Array#sort`, but it seems to consume too much memory for very large data sets. Here's a simplified version of what I did: ```ruby array1 = (1..10_000_000).to_a.shuffle array2 = (5_000_000..15_000_000).to_a.shuffle merged_array = array1.concat(array2).sort ``` This leads to a `MemoryError` on my machine, and I suspect that holding such large arrays in memory at once is the scenario. I also attempted to use `Array#push` to build the merged array incrementally, but the sorting still seems inefficient. Is there a way to merge and sort these two large arrays without hitting memory limits? Would using external sorting methods or a more memory-efficient sorting algorithm help? A solution that maintains performance across large datasets would be ideal. I'm currently using Ruby 2.7.0. My team is using Ruby for this microservice. Am I approaching this the right way? Thanks in advance! I'm working with Ruby in a Docker container on Ubuntu 20.04.