score:2
Accepted answer
var order = 0;
foreach (var task in childrenbyparentid[null].depthfirst(parent => childrenbyparentid[parent.id]))
task.displayorder = ++order;
score:0
root (0)
|
----------------
| |
a task (1) b task (3)
| |
c - a (2) d - b (4)
Source: stackoverflow.com
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