I was again working on a task for my hierarchical tree structure (see previous post here). This time I needed to find a specific object with a specific property value.
So here again my nested array:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | const aTreeData = [{ "NodeId": 1, "HierarchyLevel": 1, "type": "folder", "nodes": [{ "NodeId": 2, "HierarchyLevel": 2, "type": "folder", "nodes": [{ "NodeId": 3, "HierarchyLevel": 3, "type": "category" }] }, { "NodeId": 4, "HierarchyLevel": 2, "type": "category", "nodes": [{ "NodeId": 5, "HierarchyLevel": 3, "type": "file" }] } ] }, { "NodeId": 6, "HierarchyLevel": 1, "type": "folder", "nodes": [{ "NodeId": 7, "HierarchyLevel": 2, "type": "category" }] }] |
I needed a function that was able to find any object by providing only the NodeId value. Fortunately I stumbled accross some excellent code snippet by Scott Sauyet which is exactly doing what I needed:
I just had to change the properties to match my objects and it was working!
01 02 03 04 05 06 07 08 09 10 11 | const findNodeInTreeData = (aTreeData, nodeId) => { const deepFind = pred => ([x, ...xs] = []) => x && (pred(x) ? x : deepFind(pred)(x.nodes) || deepFind(pred)(xs)) const findByNodeId = id => obj => deepFind(o => o.NodeId == id)([obj]) return findByNodeId(nodeId)(aTreeData[0])}console.log(findNodeInTreeData(aTreeData, 5)) |