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我寫的代碼與領導寫的代碼,有何區別?


在程序員圈子有很多有趣的等級劃分規則,例如格子襯衫是程序員不能放棄的自尊心,襯衫上的格子數目越多,等級越高,技術越厲害;禿頂是尊貴身份的象徵,髮際線越高,等級越高,經驗越豐富;而代碼則是一個輪迴,隨著等級的變化,你會發現你寫的代碼又回到了“最初的美好”!

編者小貼士:本文僅供娛樂,博君一笑!

首先,我們先來看看不同級別的程序員寫的代碼都是怎樣的?在這裡我們把程序員從學生到CEO共分成了14個等級,快來看看,你和你領導寫的代碼,差在哪裡?

初高中同學寫的代碼

  10 PRINT "HELLO WORLD"

  20 END

## 大學一年級同學寫的代碼


  program Hello(input, output)

    begin

      writeln('Hello World')

    end.

大學四年級同學寫的代碼

  (defun hello

    (print

      (cons 'Hello (list 'World))))

初入職場菜鳥程序員寫的代碼

  #include 

  void main(void)

  {

    char *message[] = {"Hello ", "World"};

    int i;

 

    for(i = 0; i < 2; ++i)

      printf("%s", message[i]);

    printf("n");

  }

工作多年的資深程序員寫的代碼

  #include 

  #include 


  class string

  {

  private:

    int size;

    char *ptr;

 

  string() : size(0), ptr(new char[1]) { ptr[0] = 0; }

 

    string(const string &s) : size(s.size)

    {

      ptr = new char[size + 1];

      strcpy(ptr, s.ptr);

    }

 

    ~string()

    {

      delete [] ptr;

    }

 

    friend ostream &operator <<(ostream &, const string &);

    string &operator=(const char *);

  };

 

  ostream &operator<<(ostream &stream, const string &s)

  {

    return(stream << s.ptr);

  }

 

  string &string::operator=(const char *chrs)

  {

    if (this != &chrs)

    {

      delete [] ptr;

     size = strlen(chrs);

      ptr = new char[size + 1];

      strcpy(ptr, chrs);

    }

    return(*this);

  }

 

  int main()

  {

    string str;

 

    str = "Hello World";

    cout << str << endl;

 

    return(0);

  }

骨灰級程序員寫的代碼

  [

  uuid(2573F8F4-CFEE-101A-9A9F-00AA00342820)

  ]

  library LHello

  {

      // bring in the master library

      importlib("actimp.tlb");

      importlib("actexp.tlb");

 

      // bring in my interfaces

      #include "pshlo.idl"

 

      [

      uuid(2573F8F5-CFEE-101A-9A9F-00AA00342820)

      ]

      cotype THello

   {

   interface IHello;

   interface IPersistFile;

   };

  };

 

  [

  exe,

  uuid(2573F890-CFEE-101A-9A9F-00AA00342820)

  ]

  module CHelloLib

  {

 

      // some code related header files

      importheader();

      importheader();

      importheader();

      importheader("pshlo.h");

      importheader("shlo.hxx");

      importheader("mycls.hxx");

 

      // needed typelibs

      importlib("actimp.tlb");

      importlib("actexp.tlb");

      importlib("thlo.tlb");

 

      [

      uuid(2573F891-CFEE-101A-9A9F-00AA00342820),

      aggregatable

      ]

      coclass CHello

   {

   cotype THello;

   };

  };
 

  #include "ipfix.hxx"

  extern HANDLE hEvent;

  class CHello : public CHelloBase

  {

  public:

      IPFIX(CLSID_CHello);


      CHello(IUnknown *pUnk);

      ~CHello();


      HRESULT  __stdcall PrintSz(LPWSTR pwszString);

 

  private:

      static int cObjRef;

  };

 
  #include 

  #include 

  #include 

  #include 

  #include "thlo.h"

  #include "pshlo.h"

  #include "shlo.hxx"

  #include "mycls.hxx"


  int CHello::cObjRef = 0;


  CHello::CHello(IUnknown *pUnk) : CHelloBase(pUnk)

  {

      cObjRef++;

      return;

  }

 

  HRESULT  __stdcall  CHello::PrintSz(LPWSTR pwszString)

  {

      printf("%ws

", pwszString);

      return(ResultFromScode(S_OK));

  }


  CHello::~CHello(void)

  {

 

  // when the object count goes to zero, stop the server

  cObjRef--;

  if( cObjRef == 0 )

      PulseEvent(hEvent);

 

  return;

  }

 

  #include 

  #include 

  #include "pshlo.h"

  #include "shlo.hxx"

  #include "mycls.hxx"


  HANDLE hEvent;


   int _cdecl main(

  int argc,

  char * argv[]

  ) {

  ULONG ulRef;

  DWORD dwRegistration;

  CHelloCF *pCF = new CHelloCF();

 

  hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

 

  // Initialize the OLE libraries

  CoInitializeEx(NULL, COINIT_MULTITHREADED);

 

  CoRegisterClassObject(CLSID_CHello, pCF, CLSCTX_LOCAL_SERVER,

      REGCLS_MULTIPLEUSE, &dwRegistration);

 

  // wait on an event to stop

  WaitForSingleObject(hEvent, INFINITE);

 

  // revoke and release the class object

  CoRevokeClassObject(dwRegistration);

  ulRef = pCF->Release();

 

  // Tell OLE we are going away.

  CoUninitialize();

 

  return(0); }

 

  extern CLSID CLSID_CHello;

  extern UUID LIBID_CHelloLib;

 

  CLSID CLSID_CHello = { /* 2573F891-CFEE-101A-9A9F-00AA00342820 */

      0x2573F891,

      0xCFEE,

      0x101A,

      { 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }

  };

 

  UUID LIBID_CHelloLib = { /* 2573F890-CFEE-101A-9A9F-00AA00342820 */

      0x2573F890,

      0xCFEE,

      0x101A,

      { 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }

  };

 

  #include 

  #include 

  #include 

  #include 

  #include 

  #include "pshlo.h"

  #include "shlo.hxx"

  #include "clsid.h"

 

  int _cdecl main(

  int argc,

  char * argv[]

  ) {

  HRESULT  hRslt;

  IHello        *pHello;

  ULONG  ulCnt;

  IMoniker * pmk;

  WCHAR  wcsT[_MAX_PATH];

  WCHAR  wcsPath[2 * _MAX_PATH];

 

  // get object path

  wcsPath[0] = '';

  wcsT[0] = '';

  if( argc > 1) {

      mbstowcs(wcsPath, argv[1], strlen(argv[1]) + 1);

      wcsupr(wcsPath);

      }

  else {

      fprintf(stderr, "Object path must be specifiedn");

      return(1);

      }

 

  // get print string

  if(argc > 2)

      mbstowcs(wcsT, argv[2], strlen(argv[2]) + 1);

  else

      wcscpy(wcsT, L"Hello World");

 

  printf("Linking to object %wsn", wcsPath);

  printf("Text String %wsn", wcsT);

 

  // Initialize the OLE libraries

  hRslt = CoInitializeEx(NULL, COINIT_MULTITHREADED);

 

  if(SUCCEEDED(hRslt)) {

 

 

      hRslt = CreateFileMoniker(wcsPath, &pmk);

      if(SUCCEEDED(hRslt))

   hRslt = BindMoniker(pmk, 0, IID_IHello, (void **)&pHello);

 

      if(SUCCEEDED(hRslt)) {

 

   // print a string out

   pHello->PrintSz(wcsT);

 

   Sleep(2000);

   ulCnt = pHello->Release();

   }

      else

   printf("Failure to connect, status: %lx", hRslt);

 

      // Tell OLE we are going away.

      CoUninitialize();

      }

 

  return(0);

  }

菜鳥黑客寫的代碼

  #!/usr/local/bin/perl

  $msg="Hello, world.n";

  if ($#ARGV >= 0) {

    while(defined($arg=shift(@ARGV))) {

      $outfilename = $arg;

      open(FILE, ">" . $outfilename) || die "Can't write $arg: $!n";

      print (FILE $msg);

      close(FILE) || die "Can't close $arg: $!n";

    }

  } else {

    print ($msg);

  }

  1;

有經驗的黑客寫的代碼

  #include 

  #define S "Hello, Worldn"

  main(){exit(printf(S) == strlen(S) ? 0 : 1);}

資深黑客寫的代碼

  % cc -o a.out ~/src/misc/hw/hw.c

  % a.out

骨灰級黑客大師寫的代碼

  % echo "Hello, world."

新任的初級經理寫的代碼

  10 PRINT "HELLO WORLD"

  20 END

中級經理寫的代碼

  mail -s "Hello, world." [email protected]

  Bob, could you please write me a program that prints "Hello, world."?

  I need it by tomorrow.

  ^D

高級經理寫的代碼

  % zmail jim

  I need a "Hello, world." program by this afternoon.

公司CEO寫的代碼

  % letter

  letter: Command not found.

  % mail

  To: ^X ^F ^C

  % help mail

  help: Command not found.

  % damn!

  !: Event unrecognized

  % logout

看完不同級別程序員的代碼之後,你是不是也有所觸動呢?上面的例子可能有點寬泛,接下來我們就集中在Go語言,看看不同級別的程序員都是怎麼樣寫代碼的?

初級Go語言程序員寫的代碼

package fac

func Factorial(n int) int {
res := 1

for i := 1; i <= n; i++ {
res *= i
}

return res
}

功能性Go語言程序員寫的代碼

package fac

func Factorial(n int) int {
if n == 0 {
return 1
} else {
return Factorial(n - 1) * n
}
}

通用Go語言程序員寫的代碼

package fac

func Factorial(n interface{}) interface{} {
v, valid := n.(int)
if !valid {
return 0
}

res := 1

for i := 1; i <= v; i++ {
res *= i
}

return res
}

多線程優化的Go語言程序員寫的代碼

 package fac

import "sync"

func Factorial(n int) int {
var (
left, right = 1, 1
wg sync.WaitGroup
)

wg.Add(2)

pivot := n / 2

go func() {
for i := 1; i < pivot; i++ {
left *= i
}

wg.Done()
}()

go func() {
for i := pivot; i <= n; i++ {
right *= i
}

wg.Done()
}()

wg.Wait()

return left * right
}

利用Go設計模式的程序員寫的代碼

package fac

func Factorial(n int) <-chan int {
ch := make(chan int)

go func() {
prev := 1

for i := 1; i <= n; i++ {
v := prev * i

ch <- v

prev = v
}

close(ch)
}()

return ch
}

利用成熟的Go解決方案寫的代碼

package fac

/**
 * @see https://en.wikipedia.org/wiki/Factorial
 */
type IFactorial interface {
CalculateFactorial() int
}

// FactorialImpl implements IFactorial.
var _ IFactorial = (*FactorialImpl)(nil)

/**
 * Used to find factorial of the n.
 */
type FactorialImpl struct {
/**
 * The n.
 */
n int
}

/**
 * Constructor of the FactorialImpl.
 *
 * @param n the n.
 */
func NewFactorial(n int) *FactorialImpl {
return &FactorialImpl{
n: n,
}
}

/**
 * Gets the n to use in factorial function.
 *
 * @return int.
 */
func (this *FactorialImpl) GetN() int {
return this.n
}

/**
 * Sets the n to use in factorial function.
 *
 * @param n the n.
 * @return void.
 */
func (this *FactorialImpl) SetN(n int) {
this.n = n
}

/**
 * Returns factorial of the n.
 *
 * @todo remove "if" statement. Maybe we should use a factory or somthing?
 *
 * @return int.
 */
func (this *FactorialImpl) CalculateFactorial() int {
if this.n == 0 {
return 1
}

n := this.n
this.n = this.n - 1

return this.CalculateFactorial() * n
}

高級Go語言程序員寫的代碼

package fac

// Factorial returns !n.
func Factorial(n int) int {
res := 1

for i := 1; i <= n; i++ {
res *= i
}

return res
}

類似於Rob Pike宗師級程序員寫的代碼

package fac

// Factorial returns !n.
func Factorial(n int) int {
res := 1

for i := 1; i <= n; i++ {
res *= i
}

return res
}

原文鏈接:

https://www.ariel.com.au/jokes/The_Evolution_of_a_Programmer.html

https://github.com/SuperPaintman/the-evolution-of-a-go-programmer#the-evolution-of-a-go-programmer