Read, validate, transform, and write common data formats
Goal
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
Step-by-step
01
Inspect the schema
Know which fields are required and which are optional.
02
Parse with standard libraries
Do not build JSON parsers with string splitting.
03
Validate types
A field that exists can still have the wrong type.
04
Preserve encoding
Use UTF-8 consistently and handle delimiters/quotes correctly for CSV.
05
Write a round-trip test
Read a small file, write it back, and compare the important fields.
Verify before moving on
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
You should be able to demonstrate the result described in the lesson and explain why each step was necessary.
Troubleshooting
If a command or screen differs from the lesson, stop and verify the version you are using before forcing a change.
What you learned
You now understand the purpose of this part of the system and have a concrete result you can verify before continuing to the next lesson.