ruby substring remove

To remove a substring from a Ruby string, you can use the gsub method. Here's a step-by-step explanation of how to do it:

  1. Start with a Ruby string.
  2. Call the gsub method on the string and pass in two arguments:
  3. The substring you want to remove.
  4. An empty string '' as the replacement.
  5. The gsub method will search for all occurrences of the substring in the string and replace them with the empty string.
  6. The modified string with the removed substring is returned as the result.

Here's an example that demonstrates this process:

string = "Hello, World!"
substring = "o"

result = string.gsub(substring, '')
puts result

Output:

Hell, Wrld!

In this example, the gsub method removes all occurrences of the letter "o" from the string "Hello, World!". The resulting string is "Hell, Wrld!".

Note that the gsub method is case-sensitive, so it will only remove exact matches of the substring. If you want to perform a case-insensitive removal, you can use the gsub! method instead.

string = "Hello, World!"
substring = "o"

string.gsub!(Regexp.new(substring, Regexp::IGNORECASE), '')
puts string

Output:

Hell, Wrld!

In this case, the gsub! method with the Regexp::IGNORECASE flag is used to remove all occurrences of the letter "o" (regardless of case) from the string "Hello, World!". The resulting string is "Hell, Wrld!".

I hope this explanation helps! Let me know if you have any further questions.