I have a text string "test.a..34"
   
  I wish to extract the text that comes after ".." (e.g. "34"), and the text that comes before ".." (e.g. "test.a").
   
  What is a good way to do this? Also, can you help me understand how to use "wildcards" such as "*" with sub, etc?
   
   
  #This seems to work, but I am unclear how it works:
  sub("\\*..", "", "test.a..34")
   
  #This does not work:
  sub("\\*..", "", "test.a..34")
   

       
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