I think... I think I just used a Zipper to solve a tricky problem in #rustlang. I'm quite pleased with myself.
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Replying to @Gankra_

. Mutably building a tree with only iteration, no recursion. I'll gist my prototype tomorrow AM.1 reply 0 retweets 1 like -
Replying to @Gankra_
who said anything about "inventing"? But yes, there are a few vectors involved.
7:35 PM - 3 Nov 2016
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