# Problems with deprecations of islower, lowercase, isupper, uppercase

**URL:** https://discourse.julialang.org/t/problems-with-deprecations-of-islower-lowercase-isupper-uppercase/7797
**Category:** Internals & Design
**Created:** [December 15, 2017, 8:19pm UTC](https://discourse.julialang.org/t/problems-with-deprecations-of-islower-lowercase-isupper-uppercase/7797 "2017-12-15T20:19:32Z")
**Posts on this page:** 1
**Showing post:** 40

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### Author: ![ScottPJones](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/scottpjones/32/146_2.png) [@ScottPJones](https://discourse.julialang.org/u/ScottPJones)
#### Post date: [December 18, 2017, 4:11pm UTC](https://discourse.julialang.org/t/problems-with-deprecations-of-islower-lowercase-isupper-uppercase/7797/40 "2017-12-18T16:11:41Z")

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> [@StefanKarpinski](#):
>
> The character set is how a string is encoded, not what is encoded.

Please go do some reading on the differences between character sets and encodings.  
Until you do so, it doesn’t seem to be useful to continue trying to discuss this with you.

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