Please add a method to walk entries in case-insensitive alphabetical order #172
Description
Considering a directory ./test with entries a B c D, the command ls test prints entries in alphabetical order regardless of case.
Instead the following code:
use walkdir::WalkDir;
fn main() {
for entry in WalkDir::new("test").sort_by_file_name() {
println!("{}", entry.unwrap().into_path().display());
}
}prints entries in the following order:
test
test\B
test\D
test\a
test\c
The reason is clear and is due to the sort method, however it took me some time to detect this behavior in a larger code where I was relying on actual alphabetical sorting.
Although one can easily implement case-insensitive alphabetical order using the lower level sort_by or sort_by_key methods, the existence of an additional sort_by_file_name_case_insensitive method would better clarify the two actual behaviors, and would probably be of wider use than sort_by_file_name.
If you agree I can issue a PR.
As an additional note, for performance reasons maybe it would be preferable to use the sort_unstable / sort_unstable_by / sort_unstable_by_key methods instead of the sort / sort_by / sort_by_key methods.