Su trabajo, si decide no rechazarlo, es escribir un programa que "golfice" un código dado en el idioma que elija.

Funcionalidad básica:

• Eliminar espacios en blanco extraños
• Eliminar comentarios

Funcionalidad 'avanzada':

• Combinar declaraciones ( int x; int y; int z;a int x, y, z;)
• Use variaciones más cortas de las estructuras de control básicas ( while(1)se reemplaza por for(;;))
• Mover código ( i = 0; while(i < 10) { /* ... */ ++i; }a for(i = 0; i < 10; ++i) { /* ... */ })
• Etc

Python con Python

Hace un montón de cosas, como cambiar el nombre de las variables, eliminar espacios en blanco y comentarios innecesarios, y poner todo lo que pueda en una línea. No siempre funciona completamente con una sintaxis de Python más sofisticada y continuaré actualizando con cualquier corrección.

Código:

import string
import keyword
import pkgutil

builtins = __builtins__.__dict__.keys()

vars = {}
#imported = builtins+string.__dict__.keys()+['append','extend','count','index','insert','pop','remove','reverse','sort']
multiline = ''
ml_last = ''
strings = []
defined = []
undefined = []

def get_name(name):
    if name.startswith('__'):
        vars[name] = name
        return name
    if name in vars:
        return vars[name]

    for c in string.letters+'_':
        if c not in vars.values():
            vars[name] = c
            return c

    for c0 in string.letters+'_':
        for c1 in string.letters+string.digits+'_':
            if c0+c1 not in vars.values():
                if c0+c1 in keyword.kwlist:
                    continue
                vars[name] = c0+c1
                return c0+c1

def replace_names(expr,defining=False,prefix = '',assign=True):
    if ';' in expr:
        ns = ''
        for e in expr.split(';'):
            ns += replace_names(e,assign=assign)+';'
        return ns[:-1]

    global multiline
    expr = expr.strip()
    if expr in ['']+keyword.kwlist:
        return expr
    if expr == '""':
        return '"'+strings.pop(0)+'"'
    if expr == "''":
        return "'"+strings.pop(0)+"'"

    if '=' in expr and assign:
        e = expr[:]
        vals = ['']
        while '=' in e:
            i = e.index('=')
            if e != '' and e[0] == '=':
                vals[-1] += '='
                e = e[1:]
                continue
            if e[i-1] not in '!<>*/+-%' and e[i+1] != '=' and (vals[-1]+e[:i]).count('(') == (vals[-1]+e[:i]).count(')'):
                vals[-1] += e[:i]
                e = e[i+1:]
                vals.append('')
            else:
                vals[-1] += e[:i+1]
                e = e[i+1:]

        if len(vals) > 1:
            vals[-1] += e
            ns = ''
            left,val = vals[:-1],vals[-1]
            for l in left:
                rs = replace_names(l,True,assign=assign)
                ns += rs+'='
            ns += replace_names(val,assign=assign)
            return ns

    if expr[0] in ['(','[','{']:
        try:
            delimit = expr[0]
            i = 0; level = 1
            while level > 0:
                i += 1
                char = expr[i]
                if char in '([{':
                    level += 1
                if char in ')]}':
                    level -= 1
            inner = expr[1:i]
            rest = expr[i+1:]
            return expr[0]+replace_names(inner,defining,assign=False)+expr[i]+replace_names(rest,defining,assign=assign)

        except IndexError:
            multiline = expr
            return ''

    if expr.startswith('for') and not expr.endswith('in'):
        varname = ''
        curword = ''
        for i,char in enumerate(expr):
            if char in string.letters+string.digits+'_':
                curword += char
            else:
                if curword == 'in':
                    break
                curword = ''
            varname += char
        rest = expr[i:]

        dpart = replace_names(varname[3:-2],True,assign=assign)
        rpart = replace_names(rest,assign=assign)
        return 'for' + ' '*(dpart[0] in string.letters+string.digits+'_') + dpart + ' '*(dpart[-1] in string.letters+string.digits+'_') + 'in' + ' '*(rpart[0] in string.letters+string.digits+'_') + rpart

    if expr.startswith('lambda'):
        args = expr.split('lambda',1)[1].split(':')[0]
        replace_names(args,True,assign=assign)

    poses = ['' if e == -1 else e for e in (expr.find(char) for char in ['(','[','{'])]
    pos = min(poses)
    if pos != '':
        delimit = '([{'[poses.index(pos)]
        first,rest = expr.split(delimit,1)
        return replace_names(first,defining,assign=assign)+replace_names(delimit+rest,defining,assign=assign)

    multiline = ''
    if ' ' in expr:
        ns = ''
        for sub in expr.split(' '):
            rs = replace_names(sub,defining,assign=assign)
            if rs == '':
                continue
            if ns != '' and (ns[-1] in string.letters+string.digits+'_' and rs[0] in string.letters+string.digits+'_'):
                ns += ' '+rs
            else:
                ns += rs
        return ns

    for cmp in ['**=','//=','==','!=','<>','<=','>=','+=','-=','*=','/=','%=','//','**','<<','>>','<','>','+','-','*','/','%','&','|','^','~',':',',','.']:
        if cmp in expr:
            ns = ''
            for sub in expr.split(cmp):
                rs = replace_names(sub,defining,prefix,assign=assign)+cmp
                ns += rs 
                if cmp == '.':
                    prefix += rs 
            return ns[:-len(cmp)]

    if expr[0] in string.digits:
        return expr
    if not defining and expr not in defined:
        #print '---',prefix+expr
        if prefix+expr not in undefined and (prefix == '' or prefix[0] != '.') :
            undefined.append(prefix+expr)
        return expr
    if defining:
        if prefix+expr in undefined:
            undefined.remove(prefix+expr)
        if expr not in defined:
            defined.append(expr)
    return get_name(expr)

def fix_names(line):
    for cmp in ['**=','//=','==','!=','<>','<=','>=','+=','-=','*=','/=','%=','//','**','<<','>>','<','>','+','-','*','/','%','&','|','^','~',':',',','.','=','(',')','[',']','{','}']:
        if cmp in line:
            ns = ''
            for sub in line.split(cmp):
                ns += fix_names(sub)+cmp
            return ns[:-len(cmp)]
    if line in defined and line not in vars.values():
        return vars[line]
    return line

def first_pass(file):
    lines_firstpass = []
    for line in file:
        if line.strip() == '':
            continue
        indent = 0
        for char in line:
            if not char in string.whitespace:
                break
            indent += 1

        if multiline != '':
            line_string = ml_last
        else:
            line_string = ''
            #line_string = '\t'*indent
        line = multiline + line.strip()

        newline = ''
        while line:
            char = line[0]
            if char in ['"',"'"]:
                limit=char; i=0
                inside = ''
                escape = False
                while True:
                    i+=1; char = line[i]
                    if escape:
                        escape = False
                        inside += char
                        continue
                    if char == '\\':
                        escape = True
                    elif char == limit:
                        break
                    inside += char
                strings.append(inside)
                newline += limit*2
                line = line[i+1:]
            else:
                if char == '#':
                    break
                newline += char
                line = line[1:]
        line = newline

        if line == '':
            continue 
        if ' ' not in line:
            first = ''
        else:
            first,line = line.split(' ',1)  

        if first in ['class','def']:
            name = line.split('(')[0].split(':')[0].strip()
            line_string += first+' '
            defined.append(name)
            line_string += get_name(name)
            if '(' in line:
                line_string += '('
                inner = line.split('(',1)[1]
                inner = ')'.join(inner.split(')')[:-1])
                part = ''
                for char in inner:
                    if char == ',' and part.count('(') == part.count(')'):
                        line_string += replace_names(part,True)+','
                        part = ''
                    else:
                        part += char
                line_string += replace_names(part,True)+')'
            line_string += ':'

        to_import = ''
        importing = []
        if first == 'from':
            module,rest = line.split('import')
            module = module.strip()
            #imported.append(module)
            first,line = 'import',rest
            to_import += 'from '+module+' '

        if first == 'import':
            to_import += 'import '
            for module in line.split(','):
                module = module.strip()
                #imported.append(module)
                to_import += module+','
            to_import = to_import[:-1]
            line_string += to_import

        if line_string.strip() == '':
            r = replace_names(first+' '+line)
            if multiline != '':
                ml_last = line_string + r
                continue
            line_string += r
            ml_last = ''
        lines_firstpass.append((indent,line_string))
        #print '\t'*indent+line_string

    for i,(indent,line) in enumerate(lines_firstpass):
        lines_firstpass[i] = (indent,fix_names(line))
    return lines_firstpass

def second_pass(firstpass):
    lines = []
    current_line = ''
    current_line_indent = 0
    last_indent = 0
    for i,(indent,line) in enumerate(firstpass):
        for kw in keyword.kwlist:
            if line[:len(kw)] == kw:
                first = kw
                line = line[len(kw):]
                break
        else:
            first = ''
        limit=';'
        for kw in ['import','global']:
            if first == kw and current_line.startswith(kw):
                first = ''
                line = line.strip()
                limit=','

        if first not in ['if','elif','else','while','for','def','class','try','except','finally'] and indent == last_indent:
            current_line += limit*(current_line != '') + first + line
        else:
            lines.append((current_line_indent,current_line))
            current_line = first + line
            current_line_indent = indent
        last_indent = indent
    lines.append((current_line_indent,current_line))

    new_lines = []
    i = 0
    while i < len(lines):
        indent,line = lines[i]
        if i != len(lines)-1 and lines[i+1][0] == indent + 1 and (i == len(lines)-2 or lines[i+2][0] <= indent):
            new_lines.append((indent,line+lines[i+1][1]))
            i += 1
        else:
            new_lines.append((indent,line))
        i += 1
    return new_lines

def third_pass(lines):
    new_definitions = ''
    for u in sorted(undefined,key=lambda s:-s.count('.')):
        #print u
        parts = u.split('.')
        if parts[0] in vars.values():
            continue
        c = 0
        for indent,line in lines:
            if line.startswith('import'):
                continue
            c += line.count(u)
        if c > 1:
            new_definitions += ';'*(new_definitions!='')+get_name(u)+'='+u
            for ind,(indent,line) in enumerate(lines):
                if line.startswith('import'):
                    continue
                nline = ''
                cur_word = ''
                i = 0
                while i < len(line):
                    char = line[i]
                    if char not in string.letters+string.digits+'_.':
                        if cur_word == u:
                            nline += get_name(u)
                        else:
                            nline += cur_word
                        cur_word = ''
                        nline += char
                        i += 1
                        continue
                    if char in '"\'':
                        nline += char
                        limit = char
                        escape = False
                        while True:
                            i += 1
                            char = line[i]
                            nline += char
                            if escape:
                                escape = False
                                continue
                            if char == '\\':
                                escape = True
                            if char == limit:
                                break
                        i += 1
                        continue
                    cur_word += char
                    i += 1
                lines[ind] = (indent,nline+cur_word)

    return [lines[0]]+[(0,new_definitions)]+lines[1:]

def golf(filename):
    file = open(filename)
    write_file = open('golfed.py','w')
    for indent,line in third_pass(second_pass(first_pass(file))):
        write_file.write('\t'*(indent/2)+' '*(indent%2)+line+'\n')
    file.close()
    write_file.close()

#print first_pass(["for u in sorted(undefined,key=lambda s:-s.count('.')):"])
golf('golfer.py')

Probado en un viejo programa de dibujo fractal que tenía ( 4672 a 1889 ):

Original:

import pygame
import math
import os
import colorsys
from decimal import *

#two = Decimal(2)
#half = Decimal(0.5)

def fractal_check_point(function,x,y):
    #n = (Decimal(0),Decimal(0))
    n = (0,0)
    i = 0
    last_dist = 0
    while n[0]**2 + n[1]**2 <= 16 and i < max_iter:
        nr,ni = function(n)
        n = (nr+x,ni+y)
        i+=1
    if i == max_iter:
        return False

    #extra = math.log(math.log( (n[0]**two + n[1]**two)**half )/math.log(300),2)
    extra = math.log(math.log( (n[0]**2 + n[1]**2)**0.5 )/math.log(300),2)

    #prev = math.sqrt(last_dist)
    #final = math.sqrt(n.real**2+n.imag**2)

    return i - extra

def f((r,i)):
    return (r**2 - i**2, 2*r*i)

screen_size = (500,500)
try: screen = pygame.display.set_mode(screen_size)
except pygame.error:
    print 'Too large to draw to window...'
    screen = pygame.Surface(screen_size)

#pixels = pygame.PixelArray(screen)

#xmin = Decimal(- 2.2)
#xmax = Decimal(.8)
#
#ymin = Decimal(- 1.5)
#ymax = Decimal(1.5)

max_iter = 50

xmin = -2.2
xmax = 0.8
ymin = -1.5
ymax = 1.5


def draw_fractal():
    print repr(xmin),repr(xmax)
    print repr(ymin),repr(ymax)
    print

    xlist = []
    ylist = []

    for x in range(screen_size[0]):
        #xlist.append(Decimal(x)*(xmax-xmin)/Decimal(screen_size[0])+xmin)
        xlist.append(x*(xmax-xmin)/screen_size[0]+xmin)

    for y in range(screen_size[1]):
        #ylist.append(Decimal(y)*(ymax-ymin)/Decimal(screen_size[1])+ymin)
        ylist.append(y*(ymax-ymin)/screen_size[1]+ymin)

    xi = 0
    for x in xlist:
        yi = 0
        for y in ylist:
            val = fractal_check_point(f,x,y)
            if val == False:
                screen.set_at((xi,yi),(0,0,0))
                #pixels[xi][yi] = (0,0,0)
            else:
                r,g,b = colorsys.hsv_to_rgb(val/10.0 % 1, 1, 1)
                screen.set_at((xi,yi),(r*255,g*255,b*255))
                ##screen.set_at((xi,yi),(0,(val/300.0)**.25*255,(val/300.0)**.25*255))
                #pixels[xi][yi] = (0,(val/300.0)**.25*255,(val/300.0)**.25*255)

            yi += 1
        xi += 1
        pygame.event.get()
        pygame.display.update((xi-1,0,1,screen_size[1]))
    save_surface('F:\FractalZoom\\')

def save_surface(dirname):
    i = 0
    name = '%05d.bmp' % i
    while name in os.listdir(dirname):
        i += 1
        name = '%05d.bmp' % i
    pygame.image.save(screen,dirname+name)
    print 'saved'

x_min_step = 0
x_max_step = 0
y_min_step = 0
y_max_step = 0

savefail = 0

def zoom(xmin_target,xmax_target,ymin_target,ymax_target,steps):
    global xmin
    global xmax
    global ymin
    global ymax

    xc = (xmax_target + xmin_target)/2
    yc = (ymax_target + ymin_target)/2

    d_xmin = ((xc-xmin_target)/(xc-xmin))**(1.0/steps)
    d_xmax = ((xc-xmax_target)/(xc-xmax))**(1.0/steps)
    d_ymin = ((yc-ymin_target)/(yc-ymin))**(1.0/steps)
    d_ymax = ((yc-ymax_target)/(yc-ymax))**(1.0/steps)

    for s in range(steps):
        xmin = xc-(xc-xmin)*d_xmin
        xmax = xc-(xc-xmax)*d_xmax
        ymin = yc-(yc-ymin)*d_ymin
        ymax = yc-(yc-ymax)*d_ymax

        draw_fractal()
        save_dir = 'D:\FractalZoom\\'
        global savefail
        if not savefail:
            try:
                save_surface(save_dir)
            except:
                print 'Warning: Cannot save in given directory '+save_dir+', will not save images.'
                savefail = 1

#zoom(.5,.6,.5,.6,10)
#zoom(-1.07996839017,-1.07996839014,-0.27125861927,-0.27125861923,100)

#n = 1
#while 1:
#    pygame.display.update()
#    pygame.event.get()
#    
#    def f(x):
#        if x == 0:
#            return 0
#        else:
#            return x**n
#    draw_fractal()
#    n += .0001

draw_fractal()
zooming = 0
#firstx = Decimal(0)
#firsty = Decimal(0)
firstx = firsty = 0

clicking = 0
while 1:
    pygame.display.update()
    pygame.event.get()
    mx, my = pygame.mouse.get_pos()
    rx, ry = pygame.mouse.get_rel()

#   mx = Decimal(mx)
#   my = Decimal(my)
#   sx = Decimal(screen_size[0])
#   sy = Decimal(screen_size[1])
    sx = screen_size[0]
    sy = screen_size[1]

    if pygame.mouse.get_pressed()[0]:
        if clicking == 0:
            clicking = 1
        if zooming and clicking == 1:
            secondx = mx*(xmax-xmin)/sx+xmin
            secondy = my*(ymax-ymin)/sy+ymin

            firstx = firstx*(xmax-xmin)/sx+xmin
            firsty = firsty*(ymax-ymin)/sy+ymin

            if secondx < firstx:
                xmin = secondx
                xmax = firstx
            else:
                xmin = firstx
                xmax = secondx

            if secondy < firsty:
                ymin = secondy
                ymax = firsty

            else:
                ymin = firsty
                ymax = secondy

            screen.fill((0,0,0))
            screen.lock()
            draw_fractal()
            screen.unlock()
            zooming = 0 

        elif clicking == 1:
            firstx = mx
            firsty = my

            zooming = 1
            screen.set_at((firstx,firsty),(255,255,255))

        if clicking:
            clicking = 2

    else:
        clicking = 0

Golfizado:

import pygame,math,os,colorsys;from decimal import *
ai=pygame.event.get;aj=pygame.display.update;ak=math.log;al=pygame.mouse;am=False;an=pygame;ao=repr;ap=range;aq=os
def a(b,c,d):
 e=(0,0);f=0;g=0
 while e[0]**2+e[1]**2<=16 and f<o:h,i=b(e);e=(h+c,i+d);f+=1
 if f==o:return False
 j=ak(ak((e[0]**2+e[1]**2)**0.5)/ak(300),2);return f-j
def k((l,f)):return(l**2-f**2,2*l*f)
m=(500,500)
try:n=pygame.display.set_mode(m)
except pygame.error:print'Too large to draw to window...';n=pygame.Surface(m)
o=50;p=-2.2;q=0.8;r=-1.5;s=1.5
def t():
 print ao(p),ao(q);print ao(r),ao(s);print;u=[];v=[]
 for c in ap(m[0]):u.append(c*(q-p)/m[0]+p)
 for d in ap(m[1]):v.append(d*(s-r)/m[1]+r)
 w=0
 for c in u:
    x=0
    for d in v:
     y=a(k,c,d)
     if y==am:n.set_at((w,x),(0,0,0))
     else:l,z,A=colorsys.hsv_to_rgb(y/10.0%1,1,1);n.set_at((w,x),(l*255,z*255,A*255))
     x+=1
    w+=1;ai();aj((w-1,0,1,m[1]))
 B('F:\FractalZoom\\')
def B(C):
 f=0;D='%05d.bmp'%f
 while D in os.listdir(C):f+=1;D='%05d.bmp'%f
 pygame.image.save(n,C+D);print'saved'
E=0;F=0;G=0;H=0;I=0
def J(K,L,M,N,O):
 global p,q,r,s;P=(L+K)/2;Q=(N+M)/2;R=((P-K)/(P-p))**(1.0/O);S=((P-L)/(P-q))**(1.0/O);T=((Q-M)/(Q-r))**(1.0/O);U=((Q-N)/(Q-s))**(1.0/O)
 for V in ap(O):
    p=P-(P-p)*R;q=P-(P-q)*S;r=Q-(Q-r)*T;s=Q-(Q-s)*U;t();W='D:\FractalZoom\\';global I
    if not I:
     try:B(W)
     except:print'Warning: Cannot save in given directory '+W+', will not save images.';I=1
t();X=0;Y=Z=0;_=0
while 1:
 aj();ai();aa,ab=pygame.mouse.get_pos();ac,ad=pygame.mouse.get_rel();ae=m[0];af=m[1]
 if pygame.mouse.get_pressed()[0]:
    if _==0:_=1
    if X and _==1:
     ag=aa*(q-p)/ae+p;ah=ab*(s-r)/af+r;Y=Y*(q-p)/ae+p;Z=Z*(s-r)/af+r
     if ag<Y:p=ag;q=Y
     else:p=Y;q=ag
     if ah<Z:r=ah;s=Z
     else:r=Z;s=ah
     n.fill((0,0,0));n.lock();t();n.unlock();X=0
    elif _==1:Y=aa;Z=ab;X=1;n.set_at((Y,Z),(255,255,255))
    if _:_=2
 else:_=0

Ejecutar sobre sí mismo (creando una quine muy larga) ( 9951 a 5323 ):

import string,keyword,pkgutil;a=__builtins__.__dict__.keys();b={};c='';d='';e=[];f=[];g=[]
aw=string.letters;ax=string.digits;ay=keyword.kwlist;az=False;aA=True;aB=len;aC=enumerate;aD=open
def h(i):
 if i.startswith('__'):b[i]=i;return i
 if i in b:return b[i]
 for j in aw+'_':
    if j not in b.values():b[i]=j;return j
 for k in aw+'_':
    for l in aw+ax+'_':
     if k+l not in b.values():
        if k+l in ay:continue
        b[i]=k+l;return k+l
def m(n,o=az,p='',q=aA):
 if';'in n:
    r=''
    for s in n.split(';'):r+=m(s,q=q)+';'
    return r[:-1]
 global c;n=n.strip()
 if n in['']+ay:return n
 if n=='""':return'"'+e.pop(0)+'"'
 if n=="''":return"'"+e.pop(0)+"'"
 if'='in n and q:
    s=n[:];t=['']
    while'='in s:
     u=s.index('=')
     if s!=''and s[0]=='=':t[-1]+='=';s=s[1:];continue
     if s[u-1]not in'!<>*/+-%'and s[u+1]!='='and(t[-1]+s[:u]).count('(')==(t[-1]+s[:u]).count(')'):t[-1]+=s[:u];s=s[u+1:];t.append('')
     else:t[-1]+=s[:u+1];s=s[u+1:]
    if aB(t)>1:
     t[-1]+=s;r='';v,w=t[:-1],t[-1]
     for x in v:y=m(x,aA,q=q);r+=y+'='
     r+=m(w,q=q);return r
 if n[0]in['(','[','{']:
    try:
     z=n[0];u=0;A=1
     while A>0:
        u+=1;B=n[u]
        if B in'([{':A+=1
        if B in')]}':A-=1
     C=n[1:u];D=n[u+1:];return n[0]+m(C,o,q=az)+n[u]+m(D,o,q=q)
    except IndexError:c=n;return''
 if n.startswith('for')and not n.endswith('in'):
    E='';F=''
    for u,B in aC(n):
     if B in aw+ax+'_':F+=B
     else:
        if F=='in':break
        F=''
     E+=B
    D=n[u:];G=m(E[3:-2],aA,q=q);H=m(D,q=q);return'for'+' '*(G[0]in aw+ax+'_')+G+' '*(G[-1]in aw+ax+'_')+'in'+' '*(H[0]in aw+ax+'_')+H
 if n.startswith('lambda'):I=n.split('lambda',1)[1].split(':')[0];m(I,aA,q=q)
 J=[''if s==-1 else s for s in(n.find(B)for B in['(','[','{'])];K=min(J)
 if K!='':z='([{'[J.index(K)];L,D=n.split(z,1);return m(L,o,q=q)+m(z+D,o,q=q)
 c=''
 if' 'in n:
    r=''
    for M in n.split(' '):
     y=m(M,o,q=q)
     if y=='':continue
     if r!=''and(r[-1]in aw+ax+'_'and y[0]in aw+ax+'_'):r+=' '+y
     else:r+=y
    return r
 for N in['**=','//=','==','!=','<>','<=','>=','+=','-=','*=','/=','%=','//','**','<<','>>','<','>','+','-','*','/','%','&','|','^','~',':',',','.']:
    if N in n:
     r=''
     for M in n.split(N):
        y=m(M,o,p,q=q)+N;r+=y
        if N=='.':p+=y
     return r[:-aB(N)]
 if n[0]in ax:return n
 if not o and n not in f:
    if p+n not in g and(p==''or p[0]!='.'):g.append(p+n)
    return n
 if o:
    if p+n in g:g.remove(p+n)
    if n not in f:f.append(n)
 return h(n)
def O(P):
 for N in['**=','//=','==','!=','<>','<=','>=','+=','-=','*=','/=','%=','//','**','<<','>>','<','>','+','-','*','/','%','&','|','^','~',':',',','.','=','(',')','[',']','{','}']:
    if N in P:
     r=''
     for M in P.split(N):r+=O(M)+N
     return r[:-aB(N)]
 if P in f and P not in b.values():return b[P]
 return P
def Q(R):
 S=[]
 for P in R:
    if P.strip()=='':continue
    T=0
    for B in P:
     if not B in string.whitespace:break
     T+=1
    if c!='':U=d
    else:U=''
    P=c+P.strip();V=''
    while P:
     B=P[0]
     if B in['"',"'"]:
        W=B;u=0;X='';Y=False
        while aA:
         u+=1;B=P[u]
         if Y:Y=az;X+=B;continue
         if B=='\\':Y=True
         elif B==W:break
         X+=B
        e.append(X);V+=W*2;P=P[u+1:]
     else:
        if B=='#':break
        V+=B;P=P[1:]
    P=V
    if P=='':continue
    if' 'not in P:L=''
    else:L,P=P.split(' ',1)
    if L in['class','def']:
     i=P.split('(')[0].split(':')[0].strip();U+=L+' ';f.append(i);U+=h(i)
     if'('in P:
        U+='(';C=P.split('(',1)[1];C=')'.join(C.split(')')[:-1]);Z=''
        for B in C:
         if B==','and Z.count('(')==Z.count(')'):U+=m(Z,aA)+',';Z=''
         else:Z+=B
        U+=m(Z,aA)+')'
     U+=':'
    _='';aa=[]
    if L=='from':ab,D=P.split('import');ab=ab.strip();L,P='import',D;_+='from '+ab+' '
    if L=='import':
     _+='import '
     for ab in P.split(','):ab=ab.strip();_+=ab+','
     _=_[:-1];U+=_
    if U.strip()=='':
     ac=m(L+' '+P)
     if c!='':d=U+ac;continue
     U+=ac;d=''
    S.append((T,U))
 for u,(T,P)in aC(S):S[u]=(T,O(P))
 return S
def ad(ae):
 af=[];ag='';ah=0;ai=0
 for u,(T,P)in aC(ae):
    for aj in ay:
     if P[:aB(aj)]==aj:L=aj;P=P[aB(aj):];break
    else:L=''
    W=';'
    for aj in['import','global']:
     if L==aj and ag.startswith(aj):L='';P=P.strip();W=','
    if L not in['if','elif','else','while','for','def','class','try','except','finally']and T==ai:ag+=W*(ag!='')+L+P
    else:af.append((ah,ag));ag=L+P;ah=T
    ai=T
 af.append((ah,ag));ak=[];u=0
 while u<aB(af):
    T,P=af[u]
    if u!=aB(af)-1 and af[u+1][0]==T+1 and(u==aB(af)-2 or af[u+2][0]<=T):ak.append((T,P+af[u+1][1]));u+=1
    else:ak.append((T,P))
    u+=1
 return ak
def al(af):
 am=''
 for an in sorted(g,key=lambda s:-s.count('.')):
    ao=an.split('.')
    if ao[0]in b.values():continue
    j=0
    for T,P in af:
     if P.startswith('import'):continue
     j+=P.count(an)
    if j>1:
     am+=';'*(am!='')+h(an)+'='+an
     for ap,(T,P)in aC(af):
        if P.startswith('import'):continue
        aq='';ar='';u=0
        while u<aB(P):
         B=P[u]
         if B not in aw+ax+'_.':
            if ar==an:aq+=h(an)
            else:aq+=ar
            ar='';aq+=B;u+=1;continue
         if B in'"\'':
            aq+=B;W=B;Y=False
            while aA:
             u+=1;B=P[u];aq+=B
             if Y:Y=az;continue
             if B=='\\':Y=True
             if B==W:break
            u+=1;continue
         ar+=B;u+=1
        af[ap]=(T,aq+ar)
 return[af[0]]+[(0,am)]+af[1:]
def at(au):
 R=aD(au);av=aD('golfed.py','w')
 for T,P in al(ad(Q(R))):av.write('\t'*(T/2)+' '*(T%2)+P+'\n')
 R.close();av.close()
at('golfer.py')

BrainFuck - 489 Personajes

Elimina todos los caracteres no ejecutables. Respeta los comentarios desde # hasta el final de la línea.

,[>--[<++>+++++++]<+[>+>+<<-]>[<+>-]+>[<->[-]]<[[,----------]]<>>--[>+
<++++++]<<--------[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>+<<<-[>+>+<<-]>
[<+>-]+>[<->[-]]<[->>.<<]>>+<<<-[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>+
<<<-[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>++++++++++++++<<<------------
--[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>++<<<--[>+>+<<-]>[<+>-]+>[<->[-
]]<[->>.<<]>++++[>+++++++<-]>+<<++++[<------->-]<-[>+>+<<-]>[<+>-]+>[<
->[-]]<[->>.<<]>>++<<<--[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>[-]<<<,]

Naturalmente, se ejecuta a través de sí mismo de esta fuente:

,[

#subtract #
>--[<++>+++++++]<+

#strip comments
[>+>+<<-]>[<+>-]+>[<->[-]]<[[,----------]]<

#put '+' in 4th cell
>>--[>+<++++++]<<
#+
--------
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>+<<<
#,
-
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>+<<<
#-
-
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>+<<<
#.
-
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>++++++++++++++<<<
#<
--------------
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>++<<<
#>
--
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>++++[>+++++++<-]>+<<
#[
++++[<------->-]<-
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>++<<<
#]
--
[>+>+<<-]>[<+>-]+>[<->[-]]<[->>.<<]>>[-]<<<
,]

Brainfuck golfista en Bash (v3)

Este es un trabajo en progreso, lo seguiré actualizando si puedo.

Lee de un archivo (el nombre del archivo debe ser el primer argumento de la línea de comandos).

Por ahora todo lo que hace es

• Eliminar cualquier personaje que no sea <>+-.,[]
• Retire las cadenas de dos caracteres que no hacen nada útil, por ejemplo <>, ><, +-,-+
• Cuando >>>><<<<<termina , repite todo el procedimiento, por lo que se reduce a<

Código

#!/bin/bash

#if the file exists, take input from it
if [ -f $1 ]; then
input=`cat $1`
else
#complain to STDERR and exit
echo "File not found. Exiting with status 1.">&2
exit 1
fi

original=$input #save the original input
code=$input #save original input to another variable which we will be golfing
code=`echo $code|grep -o "[][<>.,+-]"|tr -d " \n"` #remove non-executable chars
output=$code; #this will be output
hits=-1; #Count the number of golfing operations carried out every time the code loops. When this is 0, the code will be completely golfed.

until [ $hits = 0 ]; do
hits=0
#we will be processing the optimised version from last time
code=$output
output=""

#Keep taking characters off from $code until it is empty
until [ m$code = m ]; do
#examine the first two chars
c1=${code:0:1}
code=`echo $code|cut -c2-`
c2=${code:0:1}
#if this is 1, the two characters now being read will be removed
ignore=0

if [ $c1$c2 = "<>" ] ; then
#set the second character to be taken off as well and not saved to output
ignore=1
elif [ $c1$c2 = "><" ] ; then
ignore=1
elif [ $c1$c2 = "+-" ] ; then
ignore=1
elif [ $c1$c2 = "-+" ] ; then
ignore=1
else
#save the char we took off to output, we aren't removing it
output=$output$c1;
fi

if [ $ignore = 1 ]; then
#ignore the second character and save no chars to output
code=`echo $code|cut -c2-`
#another hit
hits=`expr $hits + 1`
fi

#end inner until loop
done
#end main loop
done

#done, print output
echo $output;
exit 0;

Cómo funciona

Después de eliminar todos los caracteres no ejecutables, hace lo siguiente. El contador de visitas se establece -1en el inicio: cuenta cuántas operaciones de golf se llevaron a cabo cada vez que se ejecuta el bucle externo.

1. Si el código que se está jugando golf está vacío, vaya al paso 5.
2. Lea los dos primeros caracteres del código y elimine el primer carácter.
3. Si son <>, ><, +-o -+, suma 1 al hitscontador y volver al paso 1.
4. De lo contrario, guarde el primer carácter en la salida y vaya al paso 1.
5. Si el contador de visitas es 0, imprima la salida y salga.
6. De lo contrario, restablezca el contador de visitas a 0, configure el código que se está jugando como la variable de salida, restablezca la salida a la cadena vacía y vaya al paso 1.

HQ9 + golfista en Bash (v3)

Sé que HQ9 + es inútil, pero también podría enviarle cinco líneas. Se lee deentrada estándarun archivo. La ruta al archivo debe ser el primer argumento de la línea de comandos.

Caracteristicas

• Elimina todos los caracteres de comentario (cualquier cosa excepto HhQq9+)
• Elimina +(incrementa un número pero no hay forma de imprimir ese número)
• Convierte hqa mayúsculas (no golf)

Código

#!/bin/bash
if [ -f $1 ]; then
input=`cat $1`
else exit 1; fi
echo $input|tr "[[:lower:]]" "[[:upper:]]"|grep -o "[HQ9]"|tr -d ' \n'
exit 0

Java con Java

Toma el nombre del archivo como un argumento de línea de comando y edita el archivo en su lugar.

• Elimina comentarios
• Acorta los identificadores (incluidas clases, métodos, variables, parámetros de métodos y parámetros de expresión lambda)
• Recorta espacios
• Acorta las importaciones
• Elimina llaves innecesarias alrededor de declaraciones de una línea
• Convierte while(true)afor(;;)
• Elimina modificadores innecesarios, como privateyfinal

Cuando el programa se ejecuta en sí mismo, su tamaño se reduce de 7792 a 4366.

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class Golfer {

    public static void main(String[] args) throws IOException {
        Path path = new File(args[0]).toPath();
        String program = Files.readAllLines(path).stream().collect(Collectors.joining("\n"));
        Golfer golfer = new Golfer(program);
        System.out.println(golfer.toString().length() + " characters");
        System.out.println(golfer.toString().getBytes().length + " bytes");
        golfer.golf();
        String str = golfer.toString();
        Files.write(path, Arrays.asList(str));
        System.out.println(golfer);
        System.out.println(golfer.toString().length() + " characters");
        System.out.println(golfer.toString().getBytes().length + " bytes");
    }

    private String program;

    public Golfer(String program) {
        this.program = program;
    }

    public void golf() {
        doUnicodeSubstitutions();
        protectStrings();
        removeComments();
        removeDuplicateSpaces();
        removeExcessSpaces();
        removeUnnecessaryModifiers();
        simplifyImports();
        shortenIdentifiers();
        improveControlStructures();
        unprotectStrings();
    }

    void removeDuplicateSpaces() {
        program = program.replaceAll("\\s+", " ");
    }

    void removeExcessSpaces() {
        program = program.trim();
        program = program.replaceAll("([.,;:?!@%^&*()\\[\\]{}=|/<>~]) ", "$1");
        program = program.replaceAll(" ([.,;:?!@%^&*()\\[\\]{}=|/<>~])", "$1");
        program = program.replaceAll("([^+]) \\+", "$1+").replaceAll("\\+\\+ \\+", "+++").replaceAll("\\+ ([^+])", "+$1");
        program = program.replaceAll("([^-]) -", "$1-").replaceAll("-- -", "---").replaceAll("- ([^-])", "-$1");
    }

    void removeUnnecessaryModifiers() {
        program = program.replaceAll("private |final |@Override ", "");
    }

    void simplifyImports() {
        int startImports = program.indexOf("import ");
        List<String> imports = new ArrayList();
        Matcher importMatcher = Pattern.compile("import [A-Za-z0-9$_.*]*;").matcher(program);
        while (importMatcher.find()) {
            imports.add(importMatcher.group());
        }
        for (int i = 0; i < imports.size(); i++) {
            if (!imports.get(i).endsWith("*;")) {
                imports.set(i, imports.get(i).replaceFirst("\\.[A-Za-z0-9$_]*;", "\\.*;"));
            }
            imports = imports.stream().distinct().collect(Collectors.toList());
            program = program.replaceAll("import [A-Za-z0-9$_.*]*;", "");
            program = program.substring(0, startImports) + String.join("", imports) + program.substring(startImports);
        }
    }

    private List<Character> unusedCharacters;

    void shortenIdentifiers() {
        unusedCharacters = IntStream.concat(IntStream.rangeClosed('a', 'z'), IntStream.rangeClosed('A', 'Z'))
                .mapToObj(i -> (char) i)
                .filter(c -> !Pattern.compile("[^A-Za-z0-9$_']" + c + "[^A-Za-z0-9$_]").matcher(program).find())
                .collect(Collectors.toList());
        shortenIdentifiers("(class|interface|enum) ([A-Za-z0-9$_]{2,})( extends [A-Za-z0-9$_]+)?( implements [A-Za-z0-9$_,]+)?\\{",
                           2, "[^A-Za-z0-9$_]", "[^A-Za-z0-9$_]");
        shortenIdentifiers("([A-Za-z0-9$_]+(\\[+\\]+| )|<[A-Za-z0-9$_,]+>+\\[+\\]+)(?<!implements |else |package |import |return )([A-Za-z0-9$_]{2,})(?<!null)[=,;)]",
                           3, "[^A-Za-z0-9$_]", "[^A-Za-z0-9$_(]");
        shortenIdentifiers("([A-Za-z0-9$_]+ |<[A-Za-z0-9$_,]+>+)(?<!new |else )([A-Za-z0-9$_]{2,})(?<!main|toString|compareTo|equals|hashCode|paint|repaint)\\(",
                           2, "[^A-Za-z0-9$_]", "\\(", "::", "[^A-Za-z0-9$_]");
        shortenIdentifiers("[^A-Za-z0-9$_]([A-Za-z0-9$_]{2,})(,[A-Za-z0-9$_]+)*\\)?->",
                           1, "[^A-Za-z0-9$_]", "[^A-Za-z0-9$_(]");
    }

    void shortenIdentifiers(String pattern, int groupNumber, String... afficesForReplacement) {
        Pattern compiledPattern = Pattern.compile(pattern);
        Matcher matcher;
        while ((matcher = compiledPattern.matcher(program)).find()) {
            String identifer = matcher.group(groupNumber);
            char newIdentifier;
            if (unusedCharacters.remove((Character) identifer.charAt(0))) {
                newIdentifier = identifer.charAt(0);
            } else if (Character.isUpperCase(identifer.charAt(0))
                       && unusedCharacters.remove((Character) Character.toLowerCase(identifer.charAt(0)))) {
                newIdentifier = Character.toLowerCase(identifer.charAt(0));
            } else if (Character.isLowerCase(identifer.charAt(0))
                       && unusedCharacters.remove((Character) Character.toUpperCase(identifer.charAt(0)))) {
                newIdentifier = Character.toUpperCase(identifer.charAt(0));
            } else if (unusedCharacters.size() > 0) {
                newIdentifier = unusedCharacters.remove(0);
            } else {
                System.err.println("out of identifiers");
                break;
            }
            for (int i = 0; i < afficesForReplacement.length; i += 2) {
                program = program.replaceAll('(' + afficesForReplacement[i] + ')' + identifer + "(?=" + afficesForReplacement[i + 1] + ')', "$1" + newIdentifier);
            }
        }
    }

    void improveControlStructures() {
        program = program.replaceAll("while\\(([^()]+)\\)\\{", "for(;$1;){");
        program = program.replaceAll("for\\(([^()]*);true;([^()]*)\\)", "for($1;;$2)");
        while (!program.equals(removeBrackets(program))) {
            program = removeBrackets(program);
        }
    }

    String removeBrackets(String string) {
        return string.replaceAll("((if|while|do)\\([^{;]*\\))\\{([^;}]*;)\\}", "$1$3")
                .replaceAll("else\\{([^;}]*;)\\}", "else $1")
                .replaceAll("(for\\([^{;]*;[^{;]*;[^{;]*\\))\\{([^;}]*;)\\}", "$1$2");
    }

    void protectStrings() {
        adjustStrings(1000);
    }

    void unprotectStrings() {
        adjustStrings(-1000);
    }

    void adjustStrings(int n) {
        char[] chars = new char[program.length()];
        for (int i = 0; i < program.length(); i++) {
            chars[i] = program.charAt(i);
            if (chars[i] == '"' && chars[i - 1] != '\'') {
                for (i++; chars.length > i + 1 && program.charAt(i) != '"'; i++) {
                    chars[i] = (char) (program.charAt(i) + n);
                }
                chars[i] = program.charAt(i);
            }
        }
        program = new String(chars);
    }

    void removeComments() {
        program = program.replaceAll("(?s)/\\*.*\\*/", "");
        program = program.replaceAll("//.*\n", "");
    }

    void doUnicodeSubstitutions() {
        List<Character> chars = new ArrayList();
        for (int i = 0; i < program.length(); i++) {
            if (program.charAt(i) != '\\' || program.charAt(i + 1) != 'u') {
                chars.add(program.charAt(i));
            } else {
                chars.add((char) Integer.parseInt(program.substring(i + 2, i + 6), 16));
                i += 5;
            }
        }
        char[] charArray = new char[chars.size()];
        for (int i = 0; i < charArray.length; i++) {
            charArray[i] = chars.get(i);
        }
        program = new String(charArray);
    }

    @Override
    public String toString() {
        return program;
    }
}

Perl, partes 1 - 2

(elimina comentarios e ignora los #caracteres entre comillas dobles)

(elimina todo el espacio en blanco después de los corchetes y =signos)

No intenté jugar golf este código. Tal vez, cuando esté hecho, podría jugar golf.

$/="\n\n";
chomp($prog = <>);
for(1..length($prog)){
 $rev.=chop $prog;
}
#print$rev;
for(1..length($rev)){
 $temp = chop$rev;
 if ($temp eq '"'){
  if($quote == 0){$quote = 1}
  else{$quote = 0}
 }
 if($temp eq '#' && $quote == 0){$comment = 1}
 if($temp eq "\n"){
  $comment = 0;
 }
 if($comment != 1){
  $prog.=$temp;
 }
}
for(1..length($prog)){
 $rev.=chop $prog;
}
for(1..length($rev)){
 $temp = chop$rev;
 if ($temp eq ";" || $temp eq "}" || $temp eq ")" || $temp eq "=" || $temp eq "{"){
  $ws = 2;
 }
 if(($temp eq "\n" || $temp eq " ") && $ws != 0){$ws = 1}elsif($ws==1){$ws=0}
 if($ws != 1){
  $prog.=$temp;
 }
}
print$prog;

Entrada de ejemplo

for(1..10) {
 print "Hello, World!";#prints hello world
 print ($n = <>); #prints "#"
}

Salida

for(1..10){print "Hello, World!";print ($n =<>);}

A continuación, eliminará espacios entre símbolos y caracteres alfanuméricos.

Golfista Java en Perl

WIP en este momento, aunque ahora tiene un código bastante bueno.

caracteristicas:

• Elimina todos los comentarios.
• Elimina espacios en blanco innecesarios
• Elimina las declaraciones de paquetes (¡de todos modos es de un solo archivo!)

Código

#!/usr/bin/env perl
use strict;
use warnings;

my $string_re = qr/"(?:\\[btnfr"'\\]|\\(?:[0-3][0-7][0-7]|[0-7]{1,2})|\\u+[0-9a-fA-F]{4}|[^\r\n\\"])*"/;
my @lines = <>;
my @strings = ();

# First, replace strings with placeholders. Strings suck REALLY hard when replacing.
map {
  while (m/$string_re/) {
    s//"\032".@strings."\032"/e;
    push @strings, $&;
  }
} @lines;

# Remove comments
my $in_comment = 0;
my $partial_line;

sub remove_comments {
  my $line = $_[0];
  start:
  if ($in_comment) {
    if ((my $mulc_end_index = index $line, '*/') != -1) {
      $line = $partial_line . substr $line, $mulc_end_index + 2;
      $in_comment = 0;
      goto no_comment;
    }
    return 0;
  }

  no_comment:
  my $eolc_idx = index $line, '//';
  my $mulc_idx = index $line, '/*';

  if ($mulc_idx == -1 || ($eolc_idx != -1 && $eolc_idx < $mulc_idx)) {
    $line =~ s;//.*$;;;
  } elsif ($mulc_idx != -1) {
    $in_comment = 1;
    $partial_line = substr $line, 0, $mulc_idx;
    goto start;
  }
  $_ = $line;
  return 1
}

@lines = grep {&remove_comments($_)} @lines;

# Remove empty lines, remove line ends
@lines = grep(!/^\s*$/, @lines);
map {chomp;s/^\s*//;s/\s*$//} @lines;

# Remove unnecessary whitespace
map {s/\s*([][(){}><|&~,;=!+-])\s*/$1/g} @lines;

# Remove unnecessary package declaration
$lines[0] =~ s/^package [^;]+;//;

# Finally, put strings back.
map {s/\032(\d+?)\032/$strings[$1]/g} @lines;

print @lines;