65 lines
1.9 KiB
Markdown
65 lines
1.9 KiB
Markdown
# Pov
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Reparent a graph on a selected node.
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# Tree Reparenting
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This exercise is all about re-orientating a graph to see things from a different
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point of view. For example family trees are usually presented from the
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ancestor's perspective:
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```
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+------0------+
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+-1-+ +-2-+ +-3-+
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4 5 6 7 8 9
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```
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But the same information can be presented from the perspective of any other node
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in the graph, by pulling it up to the root and dragging its relationships along
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with it. So the same graph from 6's perspective would look like:
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```
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6
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+-----2-----+
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7 +-----0-----+
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+-1-+ +-3-+
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4 5 8 9
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```
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This lets us more simply describe the paths between two nodes. So for example
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the path from 6-9 (which in the first graph goes up to the root and then down to
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a different leaf node) can be seen to follow the path 6-2-0-3-9
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This exercise involves taking an input graph and re-orientating it from the point
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of view of one of the nodes.
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## Running the tests
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To run the tests run the command `go test` from within 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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Keep in mind that each reviewer will run benchmarks on a different machine, with
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different specs, so the results from these benchmark tests may vary.
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## Further information
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For more detailed information about the Go track, including how to get help if
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you're having trouble, please visit the exercism.io [Go language page](http://exercism.io/languages/go/about).
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## Source
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Adaptation of exercise from 4clojure [https://www.4clojure.com/](https://www.4clojure.com/)
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## Submitting Incomplete Solutions
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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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