Well an uppercase ASCII char is a different char than its lowercase counterpart. I would argue that not differentiating between them is an arbitrary rule that doesn’t make any sense, and in many cases, is more computationally difficult as it involves more comparisons and string manipulations (converting everything to lower case).
And the result is that you ultimately get files with visually distinct names, that aren’t actually treated as distinct, and so there is a disconnect from how we process information and how the computer is doing it.
‘A’ != ‘a’, they are just as unequal as ‘a’ and ‘b’
Edit: I would say the use case is exactly the same as programming case sensitivity, characters have meaning and capitalizing them has intent. Casing strategies are immensely prevalent in programming and carry a lot of weight for identifying programmers’ intent (properties vs backing fields as an example) similar intent can be shown with file names.
Case insensitive handling protects end-users from doing “bad” things and confusion.
I work with a lot of users and a lot of files in my job.
I don’t remember a single case, where someone had an issue because of upper- or lowercase confusions.
If I have four files, a.txt, A.txt, b.txt, and B.txt, in what order do they appear when I sort alphabetically?
edit: I don’t understand why this was downvoted?
On Mac when I rename a folder from “FOO” to “foo” git sees them as the same folder so no change is committed. In JavaScript I import a file from “foo” so locally that works. Commit my code and someone else pulls in my changes on their machine. But on their machine the folder is still “FOO” so importing from “foo” doesn’t work.
Think the other way around: What’s the use case for case insensitive file names? Does it justify the effort and complexity for the filesystem and the programs to know the difference between lower and upper space chars?
What’s the use case for case insensitive file names?
Human comprehension.
Readme, readme, README, and ReadMe are not meaningfully different to the average user.
And for dorks like us - oh my god, tab completion, you know I mean Documents, just take the fucking d!
In case you or others reading this don’t know: You can set bash’s tab-completion to be case-insensitive by putting
set completion-ignore-case on
Into your .inputrc (or globally /etc/inputrc)
For some extra fun, try interop between two systems that treat this differently. Create a SMB share on a Linux host, create a folder named TEST from a Windows client, then make Test, tEst, teSt, tesT, and test. Put a few different files in each folder on the Linux side, then try to manage ANY of it from the Windows client
