Parsing of Ruby Regular Expressions

transfer character meaning:

serial number, for example,
\ D [0-9] numeric character
\ D [^ 0-9] Except for any number character
\ s [\ s \ t \ n \ f blank character
\ s [^ \ s \ t \ n \ f] any character except blank character
\ W [A-Za-z0-9 _] print character
\ W [^ A-Za-z0-9 _] any character except print character

*: Represents 0 or more characters in front
.: Represents any character
+: Represents one or more characters in front

= ~ : Used to compare the Regular Expression and string matching, and return the matching position.
!~ : Returns true if the string does not match

The match method is used to match and compare strings and return the matching position.