the previous posted solutions are badly botched. Here's a better solution. Any further correction will appear on the website instead. (http://xahlee.org/tree/tree.html)
Similar change needs to be made for the Perl code... Java code will come tomorror. By the way, the code from me are not expected to be exemplary. These are exercises for all, also as a intro to functional programing to industry programers. Also, later on there will be non-trivial problems. # -*- coding: utf-8 -*- # Python # http://xahlee.org/tree/tree.html # Xah Lee, 2005-05 import math; def Range(iMin, iMax=None, iStep=None): if (iMax==None and iStep==None): return Range(1,iMin) if iStep==None: return Range(iMin,iMax,1) if iMin <= iMax and iStep > 0: if (isinstance(iStep,int) or isinstance(iStep,long)): return range( iMin, iMax+1, iStep) else: result=[] for i in range(int(math.floor((iMax-iMin)/iStep))+1): result.append( iMin+i*iStep) return result if iMin >= iMax and iStep < 0: if (isinstance(iStep,int) or isinstance(iStep,long)): return range( iMin, iMax-1, iStep) else: result=[] for i in range(int(math.floor((iMin-iMax)/-iStep))+1): result.append( iMin+i*iStep) return result # raise error about bad argument. To be added later. # test print Range(5,-4,-2) # Thanks to Peter Hansen for a correction. Xah [EMAIL PROTECTED] â http://xahlee.org/ -- http://mail.python.org/mailman/listinfo/python-list
