Takto? Ale závorky jsem nenašel :(
var obj = {
items: [{id: 45,lable: "Test 1.2.1",parent_id: 2}, {
id: 12,lable: "Test 1.0",parent_id: 0}, {
id: 32,lable: "Test 1.1",parent_id: 12}, {
id: 2,lable: "Test 1.2",parent_id: 12}]
},
objDict : items.reduce(function(p, c) {
p[c.id] = c;
c.children = [];
return p;
}, {}),
tree : items.reduce(function(p, c) {
if (!c.parent_id) {
p = c;
} else {
this.objDict[c.parent_id].children.push(c);
}
return p;
}, {}),
processTree : function (node, element) {
var li = document.createElement('li');
li.innerText = node.lable;
element.appendChild(li);
if (node.children.length) {
var ul = document.createElement('ul');
li.appendChild(ul);
for (var i = 0; i < node.children.length; i++) {
this.processTree(node.children[i], ul);
}
}
}
obj.processTree(tree, document.getElementById("list"));