Hi guys, I'm trying to develop my first app, but have a coding problem I can't seem to solve despite searching through forums and SwiftUI tutorials. I'm building a radiology teaching app and need to sort different pathology and anatomy into different categories, depending on the imaging study. I thought I could solve this by using multiple dictionaries but encounter an error when I try to use more than one Category declaration. I tried subdividing the items into sections and listing them as arrays in JSON data format, but this did not work either. "var chests: [Chest] = load("chest.json")     var chestcategories: [String: [Chest]] {         Dictionary(             grouping: chests,             by: { $0.category.rawValue }         )     }" "[     {         "id": 0,         "chestname": "Heart",         "chestimage": "heart",         "category": "anatomy",         "description": "Size, Shape, Margins",         "sectioncategory": "Chest"     },          {         "id": 1,         "chestname": "Lungs",         "chestimage": "lungs",         "category": "anatomy",         "description": "Airspace opacity, Pleural effusion, Pneumothorax",         "sectioncategory": "Chest"     },          {         "id": 2,         "chestname": "Airway",         "chestimage": "airway",         "category": "anatomy",         "description": "Caliber, Narrowing (Symmetric vs Asymmetric), Tracheal deviation",         "sectioncategory": "Chest"     },          {         "id": 3,         "chestname": "Diaphragm",         "chestimage": "diaphragm",         "category": "anatomy",         "description": "Is there air under the diaphragm?, Diaphragmetic hernias or defects, Shape (Right hemidiaphragm should be higher than left)",         "sectioncategory": "Chest"     }," In this example, I'd like to be able to sort and selectively display data based on both the category and sectioncategory variables. Thanks guys!