Is it possible for Perl to preserve case in a substitution?
105512
How to replace string and preserve its uppercase/lowercase
145107
Complexity of Regex substitution
123434
nginx case insensitive rewrite
97799
Is there any way to use a "constant" as hash key in Perl?
111925
What's the difference between !, %, and @ in replacement tokens?
155399
regex implementation to replace group with its lowercase version
63211
Replacements/Substitutions in Mathematica
39634
Are PHP functions case sensitive?
136176
How can I capitalize the first letter of each word in a string in Perl?
110215
Script to convert filenames to lowercase depending on extension
5512
How do I do a case-insensitive string comparison?
62812
How to convert a string to lower case in Bash?
80152
substitution rules excluding subscripted variables
139964
Better exception for non-exhaustive patterns in case
75716
How can I find the location of a regex match in Perl?
120527
Changing switch variable inside a case
35274
What is wrong with this substitution?