Ruby Intermediate Quiz 5

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Quiz 5
1. Used to get all files in a directory.
2. Used to write to a file.
3. Used to read from a file.
4. Used to append to a file.
5. Used to close a file.
6. Used to parse JSON data.
7. Used to generate JSON from data.
8. Used to find all matches in a string.
9. Used to substitute a pattern in a string.
10. Used to split a string into an array.
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