[Tutor] Which is better in principle: to store (in file) calculated data or to re-calculate it upon restarting program?

[Alan Gauld]

On 30/07/2019 18:20, boB Stepp wrote:

> What is the likelihood of file storage corruption?  I have a vague
> sense that in earlier days of computing this was more likely to
> happen, but nowadays?  Storing and recalculating does act as a good
> data integrity check of the file data.

No it doesn't! You are quite likely to get a successful calculation
using nonsense data and therefore invalid results. But they look
valid - a number is a number...

Checking data integrity is what checksums are for.


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Alan G
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