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undo&redo.md

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Day 04 - operate single char efficiently & undo / redo

  • x -> delete the current character
  • X -> delete the character before the current
  • s -> delete the current character and insert
  • S -> delete the current row and insert
  • r -> replace the current character
  • R -> replace multiple characters
  • u -> undo
  • ctrl + r -> redo