Ruby has a few methods for changing the case of strings. To convert to lowercase, use downcase: Similarly, upcase capitalizes every letter and capitalize capitalizes the first letter of the string but lowercases the rest: If you want to modify a string in place, you can add an exclamation point to any of those methods: … Read more
The are various ways: POSIX standard tr AWK Non-POSIX You may run into portability issues with the following examples: Bash 4.0 sed Perl Bash Note: YMMV on this one. Doesn’t work for me (GNU bash version 4.2.46 and 4.0.33 (and same behaviour 2.05b.0 but nocasematch is not implemented)) even with using shopt -u nocasematch;. Unsetting that … Read more
It’s in the standard library, and that’s the most straight forward way I can see to implement such a function. So yes, just loop through the string and convert each character to lowercase. Something trivial like this: or if you prefer one liners, then you can use this one by J.F. Sebastian:
You have to use the String method .toLowerCase() or .toUpperCase() on both the input and the string you are trying to match it with. Example:
Use .lower() – For example: The official 2.x documentation is here: str.lower()The official 3.x documentation is here: str.lower()