32 lines
1.1 KiB
Markdown
32 lines
1.1 KiB
Markdown
# Tree Building
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Refactor a tree building algorithm.
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Some web-forums have a tree layout, so posts are presented as a tree. However
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the posts are typically stored in a database as an unsorted set of records. Thus
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when presenting the posts to the user the tree structure has to be
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reconstructed.
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Your job will be to refactor a working but slow and ugly piece of code that
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implements the tree building logic for highly abstracted records. The records
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only contain an ID number and a parent ID number. The ID number is always
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between 0 (inclusive) and the length of the record list (exclusive). No record
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has a parent ID lower than its own ID and no record, except the root record,
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has a parent ID that's equal to its own ID.
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To run the tests simply run the command `go test` in the exercise directory.
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If the test suite contains benchmarks, you can run these with the `-bench`
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flag:
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go test -bench .
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For more detailed info about the Go track see the [help
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page](http://exercism.io/languages/go).
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## Submitting Incomplete Problems
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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