As you haven't shown any code, I assume that your problem is with the general approach. I suggest doing it the following way:
- Read the file, separate the lines into hashes of property => $value
- For each hash, add a property children => []
- For each hash, add it to the children list of the hash which has the Child propery the same value as this hashes Parent propery. You might want to create another hash to ease the lookup.
What do you mean by "indicate if a node was overwritten by its parent"? Please show us an example of where such overwriting happens and what the implications of this are.
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Want more info? How to link
or How to display code and escape characters
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