This seems like a great way to explain it, both visually and "interactively". It reminds me of how I once explained relative and absolute paths, I established a comparison using real-world addresses:
If you want to go to John's house, you would go to 54th Street, number 203, 3rd floor, in New York, USA. That's absolute.
But if you are in John's house and just want to tell him to go to the kitchen, you don't say the whole address, just the relative part: Go to the kitchen.
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This seems like a great way to explain it, both visually and "interactively". It reminds me of how I once explained relative and absolute paths, I established a comparison using real-world addresses:
If you want to go to John's house, you would go to 54th Street, number 203, 3rd floor, in New York, USA. That's absolute.
But if you are in John's house and just want to tell him to go to the kitchen, you don't say the whole address, just the relative part: Go to the kitchen.