To remove part of a string in Ruby, you can use the slice! method or the gsub! method.
The slice! method removes the specified portion of the string and returns it as a new string. Here's an example:
str = "hello world"
removed_str = str.slice!(0, 5)
puts removed_str # "hello"
puts str # " world"
In this example, the slice! method removes the first 5 characters ("hello") from the str variable and returns them as removed_str.
The gsub! method allows you to remove specific character sequences from a string. Here's an example:
str = "goodbye moon"
str.gsub!('moon', '')
puts str # "goodbye"
In this example, the gsub! method removes the word "moon" from the str variable and updates the variable with the new string, which is "goodbye".