> As my app matured, I found that I often wanted hierarchical folder-like functionality. In the process of prototyping some "remote" collaborating file systems

> As my app matured, I found that I often wanted hierarchical folder-like functionality. In the process of prototyping some "remote" collaborating file systems, I always wonder whether it is a good idea maintaining a flat map from path concatenated with "/" like an S3 to the file content, in term of efficiency or elegancy.