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You're viewing a comment by Chip Camden and its responses.
How about if you're filtering data to pass to a legacy system that only understands ASCII?
archving 7-bit ASCII documents in the Planetary Data System
tr -d '\n\r -z' < blah.txt | wc -c
should return zero. I've used this 'trick' many times.
How would I use this, then? Drop all invalid characters? Replace them all with a fixed value? Check for bad strings and abort? Besides being kind of hard to read, this is pretty limiting in what your options are when you encounter such a character.
I'd use something like #map which is easier to understand, and more flexible in what it can do when it encounters a non-ASCII character.
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