random test. # I wanted to try and flush the string before it dies. note that ruby only has a finalizer , it does not have a destructor. I could have use ObjectSpace.define_finalizer self, proc {persist} and use GC.start at the command line to run the garbage collector however it would be after destroying an instance object.

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random test. # I wanted to try and flush the string before it dies. note that ruby only has a finalizer , it does not have a destructor. I could have use ObjectSpace.define_finalizer self, proc {persist} and use GC.start at the command line to run the garbage collector however it would be after destroying an instance object.

✓ Published0🌍 Public

Last edited Dec 11, 2013

Created on Dec 11, 2013

This example demonstrates a Ruby class called `PersistentString` that extends the built-in `String` class, showing how to add persistence and utility methods while retaining core string behavior. The code shows what the class does—such as saving data to files, checking palindromes, and reading/appending file contents—before explaining how it works, using instance methods like `persist` and class methods like `read_to` and `append_to`, with error handling via `STDERR.puts`. It relies on standard Ruby APIs like `File.open`, `File.exist?`, and `STDOUT.puts`, and the example uses interactive console sessions (e.g., `2.0.0-p247 :004 >`) to illustrate usage. The data source is user-provided strings, and the rendering approach is file-based output, not visual.

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