/* $DOC$
   $NAME$
      CharOnly()
   $CATEGORY$
      CT3 string functions
   $ONELINER$
      Intersectional set of two strings based on characters
   $SYNTAX$
      CharOnly( <cThisCharactersOnly>, <cString> ) -> cReducedString
   $ARGUMENTS$
      <cThisCharactersOnly>   specifies the characters that must not be
                              deleted in <cString>.
      <cString>               is the string that should be processed
   $RETURNS$
      <cReducedString>        A string with all characters deleted but those
                              specified in <cThisCharactersOnly>.
   $DESCRIPTION$
      The CharOnly() function calculates the intersectional set of two
      strings. To do this, it deletes all characters from <cString> that
      do not appear in <cThisCharacterOnly>.
   $EXAMPLES$
      ? CharOnly( "0123456789", "0211 - 38 99 77" )  //  "0211389977"
      ? CharOnly( "0123456789", "0211/ 389 977" )    //  "0211389977"
   $STATUS$
      Ready
   $COMPLIANCE$
      CharOnly() is compatible with CT3's CharOnly().
   $PLATFORMS$
      All
   $FILES$
      Library is hbct.
   $SEEALSO$
      CharRem(),  WordOnly(),  WordRem()
   $END$
 */

/* $DOC$
   $NAME$
      WordOnly()
   $CATEGORY$
      CT3 string functions
   $ONELINER$
      Intersectional set of two strings based on double characters
   $SYNTAX$
      WordOnly( <cThisDoubleCharactersOnly>, <cString> ) -> cReducedString
   $ARGUMENTS$
      <cThisDoubleCharactersOnly> specifies the double characters that must
                                  not be deleted in <cString>.
      <cString>                   is the string that should be processed
   $RETURNS$
      <cReducedString>        A string with all double characters deleted
                              but those specified in <cThisCharactersOnly>.
   $DESCRIPTION$
      The WordOnly() function calculates the intersectional set of two
      strings based on double characters. To do this, it deletes all double
      characters from <cString> that do not appear in <cThisDoubleCharacterOnly>.
   $EXAMPLES$
      ? WordOnly( "AABBCCDD", "XXAAYYBBZZ" )  // "AABB"
      ? WordOnly( "AABBCCDD", "XAAYYYBBZZ" )  // "BB"
   $STATUS$
      Ready
   $COMPLIANCE$
      WordOnly() is compatible with CT3's WordOnly().
   $PLATFORMS$
      All
   $FILES$
      Library is hbct.
   $SEEALSO$
      CharOnly(),  CharRem(),  WordRem()
   $END$
 */

/* $DOC$
   $NAME$
      CharRem()
   $CATEGORY$
      CT3 string functions
   $ONELINER$
      Removes characters from a string
   $SYNTAX$
      CharRem( <cDeleteThisCharacters>, <cString> ) -> cReducedString
   $ARGUMENTS$
      <cDeleteThisCharacters>   specifies the characters that should
                                be deleted in <cString>
      <cString>)                is the string that should be processed
   $RETURNS$
      <cReducedString>          is a string where the characters specified
                                in <cDeleteThisCharacters> are deleted
   $DESCRIPTION$
      The CharRem() function deletes the characters specified in
      <cDeleteThisCharacters> from <cString>.
   $EXAMPLES$
      ? CharRem( " ", " 1  2  " )   // "12"
      ? CharRem( "3y", "xyz123" )   // "xz12"
   $STATUS$
      Ready
   $COMPLIANCE$
      CharRem() is compatible with CT3's CharRem().
   $PLATFORMS$
      All
   $FILES$
      Library is hbct.
   $SEEALSO$
      CharOnly(),  WordOnly(),  WordRem()
   $END$
 */

/* $DOC$
   $NAME$
      WordRem()
   $CATEGORY$
      CT3 string functions
   $ONELINER$
      Removes characters from a string
   $SYNTAX$
      WordRem( <cDeleteThisDoubleCharacters>, <cString> ) -> cReducedString
   $ARGUMENTS$
      <cDeleteThisDoubleCharacters>   specifies the double characters that
                                      should be deleted in <cString>
      <cString>)                      is the string that should be processed
   $RETURNS$
      <cReducedString>          is a string where the double characters
                                specified in <cDeleteThisDoubleCharacters>
                                are deleted
   $DESCRIPTION$
      The WordRem() function deletes the double characters specified in
      <cDeleteThisDoubleCharacters> from <cString>.
   $EXAMPLES$
      ? WordRem( "abcd", "0ab1cd" )   // "0ab1"
      ? WordRem( "abcd", "ab0cd1" )   // "0cd1"
   $STATUS$
      Ready
   $COMPLIANCE$
      WordRem() is a new function available only in Harbour's CT3.
   $PLATFORMS$
      All
   $FILES$
      Library is hbct.
   $SEEALSO$
      CharOnly(),  CharRem(),  WordRem()
   $END$
 */