Delete characters
The String class defines the delete method for deleting characters. Very useful for filtering out unwanted characters. ⚠️ The method doesn’t delete sub-strings, but each character present in argument. delete! modifies the instance and returns nil if there has been no change.
delete doesn’t let you use a regular expression, but supports 2.5 special characters:
-to define a range of characters^for the negation of a set\to escape one of these 3 characters
The method definition is delete(*selectors), the splat operator allows multiple arguments. In this case, the intersection of each set determines the characters to be deleted.
Links to Ruby documentation for delete and selection rules.
