Redo

Implementing Undo/Redo in a Web Application that uses Ajax

Implementing Undo/Redo in a Web Application that uses Ajax
  1. How do you implement redo and undo?

How do you implement redo and undo?

If “UNDO” string is encountered, pop the top element from Undo stack and push it to Redo stack. If “REDO” string is encountered, pop the top element of Redo stack and push it into the Undo stack. If “READ” string is encountered, print all the elements of the Undo stack in reverse order.

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