Python程序员的进化史

2015-05-12 分类:Python 阅读(7260) 评论(6)

几年前在网上流行一段很有趣的代码,今日有缘得见,捧腹一笑。

#新手程序员

def factorial(x):
    if x == 0:
        return 1
    else:
        return x * factorial(x - 1)
print factorial(6)

#有一年 Pascal 经验的程序员

def factorial(x):
    result = 1
    i = 2
    while i <= x:
        result = result * i
        i = i + 1
    return result
print factorial(6)

#有一年 C 经验的程序员

def fact(x): #{
    result = i = 1;
    while (i <= x): #{
        result *= i;
        i += 1;
    #}
    return result;
#}
print(fact(6))

#有一年 SICP 经验的程序员

@tailcall
def fact(x, acc=1):
    if (x > 1): return (fact((x - 1), (acc * x)))
    else: return acc
print(fact(6))

#有一年 Python 经验的程序员

def Factorial(x):
    res = 1
    for i in xrange(2, x + 1):
        res *= i
    return res
print Factorial(6)

#懒惰的Python程序员

def fact(x):
    return x > 1 and x * fact(x - 1) or 1
print fact(6)

#更懒惰的Python程序员

f = lambda x: x and x * f(x - 1) or 1
print f(6)

#专家级Python程序员

import operator as op
import functional as f
fact = lambda x: f.foldl(op.mul, 1, xrange(2, x + 1))
print fact(6)

#Python 黑客

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')

#专家级程序员

import c_math
fact = c_math.fact
print fact(6)

#英国专家级程序员 (译注:在英式英语中,“数学”的简写,多用“maths”,不是“math"。)

import c_maths
fact = c_maths.fact
print fact(6)

#网页设计师

def factorial(x):
    #-------------------------------------------------
    #--- 这段代码是从 Math Vault 那弄过来滴---
    #--- 计算阶乘 (C)亚瑟·史密斯 1999年---
    #-------------------------------------------------
    result = str(1)
    i = 1 #谢谢亚当
    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 程序员

import os
def fact(x):
    os.system('factorial ' + str(x))
fact(6)

#Windows 程序员

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)

#企业程序员

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))
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已经有6 条评论抢在你前面了~
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  1. fm

    ????,有趣,虽然大部分看不懂,来博主这学习了

    #1
    回复
  2. 左岸听风

    综上所述,还是搞设计的最有逼格

    #3
    回复
  3. 某落汤猫

    额,太高端了,高中生表示看不懂。。。不懂梗的忧桑

    #5
    回复
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