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Bubble sort and binary search were ok, just took a long time trying to implement it without pseudo code.
Linked list - reverse! took so long because I knew roughly what had to be done but didn't have a concrete algorithm. Had to google for a hint and discovered I had to use 3 pointers, prev, cur and head. Other methods were fine. Rspec is cool but couldn't figure out how to test the output matched for list.each and list.map methods.