method
    
    gsub
 
  gsub(*args)
  public
  Equivalent to $_.gsub…, except that $_ will be updated if substitution occurs. Available only when -p/-n command line option specified.
 
  gsub(*args)
  public
  Equivalent to $_.gsub…, except that $_ will be updated if substitution occurs. Available only when -p/-n command line option specified.