Deduplicate - Count connected components

[hobovsky]

From #39

1. Topological Image Processing: 4-Connected Components

• 5 kyu
• Satisfaction 85% with 113 completions
• No pending issues
• 3 languages + 1 pending translation (Julia and C exclusive)
• Published Feb 2020, author active

2. Island Count

• 6 kyu
• Satisfaction 95% with 224 completions
• No pending issues
• JS only
• Published Oct 2015, author inactive

3. Count the Islands

• 6 kyu
• 8-way neighbourhood
• Satisfaction 96% with 446 completions
• No pending issues
• 3 languages, no pending translations (C++ exclusive)
• Published Jul 2015, author inactive

[Blind4Basics]

keep 1 only

2. use test expect / no random tests / less than 5 tests

3. nothing special against this one except the inactive author and the rank, which seems not really good...

[mmccoyd]

• border in the input, and input as string seems funky making it a different problem.
• but also simplifies out of bound issues compared to 3, well it would if input was an array.

2. getting rid of seems fine.

• It did seem maybe under rated, so letting it lapse seems fine (at least underrated for rust with iterative lifetimes vs recursion, but that is more a rust thing)
• 8-way adds interesting complexity if you go beyond a vanilla search. (but not if you stick to a simple solution...)
• I've been working on a rust translation, but it can apply to whatever remains

-- logmkeys

[armeanco]

Retire: Island Count

[EloiseRosen]

vote for keep 1, retire the others