st: string function

["Lee Chuntao" <chtl@econ.hku.hk>]

Hi, listers

     A piece of cake for you all but urgent for me. I wonder if there is
some function that can find how many times a character occured in a string,
i.e., suppose the function is string1(), so that,
     string1("abcd","a" )=1
     string1("abac","a" )=2
     string1("a/b/c","/" )=2
     string1("abcd","/" )=0

thanks in advance

Chuntao




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