--- /dev/null
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name: seqs.lisp
+;;;; Purpose: Sequence functions for KMRCL package
+;;;; Programmer: Kevin M. Rosenberg
+;;;; Date Started: Apr 2000
+;;;;
+;;;; $Id: seqs.lisp,v 1.1 2003/04/29 00:26:21 kevin Exp $
+;;;;
+;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;;
+;;;; KMRCL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
+
+(in-package :kmrcl)
+
+
+(defun mapappend (func seq)
+ (apply #'append (mapcar func seq)))
+
+(defun mapcar-append-string-nontailrec (func v)
+ "Concatenate results of mapcar lambda calls"
+ (aif (car v)
+ (concatenate 'string (funcall func it)
+ (mapcar-append-string-nontailrec func (cdr v)))
+ ""))
+
+
+(defun mapcar-append-string (func v &optional (accum ""))
+ "Concatenate results of mapcar lambda calls"
+ (aif (car v)
+ (mapcar-append-string
+ func
+ (cdr v)
+ (concatenate 'string accum (funcall func it)))
+ accum))
+
+(defun mapcar2-append-string-nontailrec (func la lb)
+ "Concatenate results of mapcar lambda call's over two lists"
+ (let ((a (car la))
+ (b (car lb)))
+ (if (and a b)
+ (concatenate 'string (funcall func a b)
+ (mapcar2-append-string-nontailrec func (cdr la) (cdr lb)))
+ "")))
+
+(defun mapcar2-append-string (func la lb &optional (accum ""))
+ "Concatenate results of mapcar lambda call's over two lists"
+ (let ((a (car la))
+ (b (car lb)))
+ (if (and a b)
+ (mapcar2-append-string
+ func
+ (cdr la)
+ (cdr lb)
+ (concatenate 'string accum (funcall func a b)))
+ accum)))
+
+
+
+(defun nsubseq (sequence start &optional (end (length sequence)))
+ "Return a subsequence by pointing to location in original sequence"
+ (make-array (- end start)
+ :element-type (array-element-type sequence)
+ :displaced-to sequence
+ :displaced-index-offset start))