(guile.info.gz) SRFI-13 Searching

Info Catalog

(guile.info.gz) SRFI-13 Prefixes/Suffixes

(guile.info.gz) SRFI-13

(guile.info.gz) SRFI-13 Case Mapping

 
 39.11.9 Searching
 -----------------
 
 Use these procedures to find out whether a string contains a given
 character or a given substring, or a character from a set of characters.
 
  -- Scheme Procedure: string-index s char_pred [start end]
  -- Scheme Procedure: string-index-right s char_pred [start end]
      Search through the string S from left to right (right to left),
      returning the index of the first (last) occurrence of a character
      which
 
         * equals CHAR_PRED, if it is character,
 
         * satisfies the predicate CHAR_PRED, if it is a procedure,
 
         * is in the set CHAR_PRED, if it is a character set.
 
  -- Scheme Procedure: string-skip s char_pred [start end]
  -- Scheme Procedure: string-skip-right s char_pred [start end]
      Search through the string S from left to right (right to left),
      returning the index of the first (last) occurrence of a character
      which
 
         * does not equal CHAR_PRED, if it is character,
 
         * does not satisfy the predicate CHAR_PRED, if it is a
           procedure.
 
         * is not in the set if CHAR_PRED is a character set.
 
  -- Scheme Procedure: string-count s char_pred [start end]
      Return the count of the number of characters in the string S which
 
         * equals CHAR_PRED, if it is character,
 
         * satisfies the predicate CHAR_PRED, if it is a procedure.
 
         * is in the set CHAR_PRED, if it is a character set.
 
  -- Scheme Procedure: string-contains s1 s2 [start1 end1 start2 end2]
  -- Scheme Procedure: string-contains-ci s1 s2 [start1 end1 start2 end2]
      Does string S1 contain string S2?  Return the index in S1 where S2
      occurs as a substring, or false.  The optional start/end indices
      restrict the operation to the indicated substrings.
 
      `string-contains-ci' is the case-insensitive variant.
 

Info Catalog

(guile.info.gz) SRFI-13 Prefixes/Suffixes

(guile.info.gz) SRFI-13

(guile.info.gz) SRFI-13 Case Mapping