What is difference between fail fast and fail safe?

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Tags

1. #exception
2. #thread
3. #structurally
4. #clone
5. #difference
6. #iterating
7. #throw
8. #original
9. #because
10. #called
11. #doesn
12. #modified
13. #iterator
14. #instead
15. #while
16. #collection
17. #contrary