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Repetition and regular expression searches are powerful tools that you
often use when you write code in Emacs Lisp. This chapter illustrates
the use of regular expression searches through the construction of
word count commands using
while loops and recursion.
Counting words 13.1 The
Use a regexp, but find a problem. 13.2 Count Words Recursively Start with case of no words in region. 13.3 Exercise: Counting Punctuation
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