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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,180 @@ #Newbie programmer def factorial(x): if x == 0: return 1 else: return x * factorial(x - 1) print factorial(6) #First year programmer, studied Pascal def factorial(x): result = 1 i = 2 while i <= x: result = result * i i = i + 1 return result print factorial(6) #First year programmer, studied C def fact(x): #{ result = i = 1; while (i <= x): #{ result *= i; i += 1; #} return result; #} print(fact(6)) #First year programmer, SICP @tailcall def fact(x, acc=1): if (x > 1): return (fact((x - 1), (acc * x))) else: return acc print(fact(6)) #First year programmer, Python def Factorial(x): res = 1 for i in xrange(2, x + 1): res *= i return res print Factorial(6) #Lazy Python programmer def fact(x): return x > 1 and x * fact(x - 1) or 1 print fact(6) #Lazier Python programmer f = lambda x: x and x * f(x - 1) or 1 print f(6) #Python expert programmer import operator as op import functional as f fact = lambda x: f.foldl(op.mul, 1, xrange(2, x + 1)) print fact(6) #Python hacker import sys @tailcall def fact(x, acc=1): if x: return fact(x.__sub__(1), acc.__mul__(x)) return acc sys.stdout.write(str(fact(6)) + '\n') #EXPERT PROGRAMMER import c_math fact = c_math.fact print fact(6) #ENGLISH EXPERT PROGRAMMER import c_maths fact = c_maths.fact print fact(6) #Web designer def factorial(x): #------------------------------------------------- #--- Code snippet from The Math Vault --- #--- Calculate factorial (C) Arthur Smith 1999 --- #------------------------------------------------- result = str(1) i = 1 #Thanks Adam while i <= x: #result = result * i #It's faster to use *= #result = str(result * result + i) #result = int(result *= i) #?????? result str(int(result) * i) #result = int(str(result) * i) i = i + 1 return result print factorial(6) #Unix programmer import os def fact(x): os.system('factorial ' + str(x)) fact(6) #Windows programmer NULL = None def CalculateAndPrintFactorialEx(dwNumber, hOutputDevice, lpLparam, lpWparam, lpsscSecurity, *dwReserved): if lpsscSecurity != NULL: return NULL #Not implemented dwResult = dwCounter = 1 while dwCounter <= dwNumber: dwResult *= dwCounter dwCounter += 1 hOutputDevice.write(str(dwResult)) hOutputDevice.write('\n') return 1 import sys CalculateAndPrintFactorialEx(6, sys.stdout, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) #Enterprise programmer def new(cls, *args, **kwargs): return cls(*args, **kwargs) class Number(object): pass class IntegralNumber(int, Number): def toInt(self): return new (int, self) class InternalBase(object): def __init__(self, base): self.base = base.toInt() def getBase(self): return new (IntegralNumber, self.base) class MathematicsSystem(object): def __init__(self, ibase): Abstract @classmethod def getInstance(cls, ibase): try: cls.__instance except AttributeError: cls.__instance = new (cls, ibase) return cls.__instance class StandardMathematicsSystem(MathematicsSystem): def __init__(self, ibase): if ibase.getBase() != new (IntegralNumber, 2): raise NotImplementedError self.base = ibase.getBase() def calculateFactorial(self, target): result = new (IntegralNumber, 1) i = new (IntegralNumber, 2) while i <= target: result = result * i i = i + new (IntegralNumber, 1) return result print StandardMathematicsSystem.getInstance(new (InternalBase, new (IntegralNumber, 2))).calculateFactorial(new (IntegralNumber, 6))