print "I was challenged to parse an Ip address into 4 integers at the whiteboard, having long ago left coding by rote this was my answer : " def whiteboard(s): temp=0 num=0 a=[] #missing from the board for i in s: if i == '.': a.append(temp) #on the board I erred by direct addressing vs appending num+=1 temp=0 else: temp=10*temp+int(i) a.append(temp) #on the board I erred by direct addressing vs appending return a print "Results:", s="192.168.23.1" print "Input ",s a = whiteboard(s) print "S = ",a print " " print "I was able to refactor later that day to this : " def whiteboard2(s): a=[0] for i in s: try : a[-1]=10*a[-1]+int(i) except : a.append(0) return a s="192.168.23.2" print "Input ",s print "Results:", a = whiteboard2(s) print "S = ",a
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