CamelCase in AWK

Example for versions gawk 3.1.6

Variable $0 stores the whole string read (as opposed to variables $1, $2 etc. which store fields of the record). split splits the string into fragments which are separated with matches to the regular expression and writes the result to the array words. After this each element of the array is converted to correct case using functions substr, toupper and tolower. 

{   text = $0;
    split(text, words, /[^a-zA-Z]+/);
    for (i=1; i<=length(words); i++) {
        res = res toupper(substr(words[i],1,1)) tolower(substr(words[i],2));
    }
    print res
}