In a multi-node tree, when I add a new row, I need to get the reference of that row, by its id, to fire the rowclick event programmatically.
In the following example, if I add the row with id 9, how to iterate through the tree to this node.
Note: children of children nodes are unlimited (for example: parent-children-children-children-children-children... )
Tree example
let data = [{
"id": 1,
"name": "parent 1"
}, {
"id": 2,
"name": " parent 2",
"children": [{
"id": 5,
"name": "parent-children 5",
},{
"id": 6,
"name": "parent-children 6",
"children": [{
"id": 7,
"name": "parent-children-children 7",
},{
"id": 8,
"name": "parent-children-children 8",
"children": [{
"id": 9,
"name": "parent-children-children-children 9",
},{
"id": 10,
"name": "parent-children-children-children 10",
}]
}]
}]
}, {
"id": 3,
"name": "parent 3"
}, {
"id": 4,
"name": "parent 4"
}]
Iteration on levels one and two of the nodes
getItemRow(id){
//If is a parent node
let myItem = this.parents.find(parent => parent.id === id);
if(myItem !== undefined){ return myItem }
//If is a second level children node (parent-children)
this.parents.forEach(function(parent){
let child = parent.children.find(child => child.id === id);
if(child !== undefined){ return child }
});
}
We can recursively search all nodes until we find the match:
getItemRow(id){
return findNodeWithId(id, this.parents)
}
findNodeWithId(id, rootArr) {
for (let el of rootArr) {
if (el.id === id) {
return el
}
if (el.children) {
const idFoundInChildren = findNodeWithId(id, el.children)
if (idFoundInChildren !== null) {
return idFoundInChildren
}
}
}
return null
}
You could take a recursion and find the object directly or by searching the children array.
const
find = (array, id) => {
let result;
array.some(o => result = o.id === id
? o
: find(o.children || [], id)
)
return result;
},
data = [{ id: 1, name: "parent 1" }, { id: 2, name: " parent 2", children: [{ id: 5, name: "parent-children 5" }, { id: 6, name: "parent-children 6", children: [{ id: 7, name: "parent-children-children 7" }, { id: 8, name: "parent-children-children 8", children: [{ id: 9, name: "parent-children-children-children 9" }, { id: 10, name: "parent-children-children-children 10" }] }] }] }, { id: 3, name: "parent 3" }, { id: 4, name: "parent 4" }];
console.log(find(data, 9));