Program your favorite phrase

Question

Pick a quote or phrase that is exactly 5 words long, such as Programming puzzles and code golf!.

Write a program that, when appended to itself n times, outputs the first n + 1 words of your phrase in order.

For example, if your program code was MYPROG and your phrase was Programming puzzles and code golf!, running...

• MYPROG should output Programming
• MYPROGMYPROG should output Programming puzzles
• MYPROGMYPROGMYPROG should output Programming puzzles and
• MYPROGMYPROGMYPROGMYPROG should output Programming puzzles and code
• MYPROGMYPROGMYPROGMYPROGMYPROG should output Programming puzzles and code golf!

Appending more than 4 times is undefined, your program may do anything.

Rules

• Your phrase must be grammatical meaningful English. Ideally it should be properly capitalized and punctuated.
• Your phrase may be any length but its entropy, as calculated by http://www.shannonentropy.netmark.pl/, may not be less than 3.5.
  (Paste in your phrase, hit Calculate and look for the last H(X).)
• Your phrase can only contain printable ASCII characters (hex 20 to 7E). Your code can only contain printable ASCII and tabs and newlines.
• Your phrase must contain exactly 5 unique words and 4 spaces. All non-spaces count as parts of words. Spaces are the word boundaries. They may not be leading or trailing; there should be one after all but the last word.
• The output should contain one space between words as well. The output at each appending step may contain trailing spaces but not leading spaces.
• Output to stdout. There is no input.

Scoring

Your score is the length in bytes of your initial un-appended program. (e.g. MYPROG scores 6)

As this is code-golf, the lowest score wins.

Answer 1

Piet (honorary answer)

Snakes its way downwards, running out the right through blue and re-entering through green. Prints out "Fruit flies like a banana."

I used PietCreator to make this, but you can try it out here. Remaking Piet programs is a pain, so I started out at 35x35 and continued that way, meaning that I used a lot more codels than I needed.

Actual size versions

Answer 2

><> (42)

Fish are truly the greatest pet. Some people keep bugs as pets due to an incomprehensible lack of logic. This program does its best to reason with such people.

!v'?od gub yna nac tahW;'00p!
<<|ov!
voo <

Note there this is no trailing newline in the program. The full output is reversed in the first line; the complete phrase is "What can any bug do?" (entropy 3.58418).

Full explanation:

This is one of the more fun ><> programs I've written, since this is the first that uses reflection. The first line is where the meat of the program is.

!v is a no-op, as ! causes the next instruction to be skipped.

'?od gub yna nac tahW;' stores the full phrase on the stack (it's backwards because each letter is pushed onto the stack in the order written, so it must be reversed to be popped off nicely).

00p is where the real magic starts happening. Note that it didn't just store the phrase, it also stored a ;. 00p inserts the top character onto the stack into the program at position (0, 0), so now the first character of the program is a ;.

The ending ! skips that semicolon, and moves the cursor onto v, which directs the program flow downwards.

From here on out, it's all just printing routines. Since there's no trailing newline, successive appendings of the program simply add the last two lines, in effect, since the first line will be to the right of voo <, and thus will never be executed.

At the end, the cursor is directed out the bottom left of the program, and wraps back around to the top left, where the ; was inserted earlier, ending the program.

Answer 3

Python 66

i='i'in dir()and i+1;print("Tfpcfhaialetgny"[i::5],end=" ."[i>3]);

Entropy: 3.61635

Ouput:

The fat pig can fly.

Thanks @JasonS and @grc for the tips on shortening the variable detection part.

Update: Do see JasonS' answer for a wicked wraparound trick which pushed this down to 55 bytes. :)

Answer 4

Python 2 (37)

After Sarah became president of her local Mensa chapter, she became a focus of romantic attention from men looking for an intelligent partner. On every date, Sarah would try to make a personal connection, but the men would just probe her on abstruse philosophical questions. Frustrated that nobody cared about her emotional side, she exclaimed ...

i=4;print"mniIMeosQy!t"[i::5],;i-=1;i

Output:

My
My IQ
My IQ is
My IQ is not
My IQ is not me!

The entropy is H(x)=3.5 exactly.

Credit to Jason S., whose answer I basically used wholesale. The ii wraparound trick is wonderful.

Answer 5

Python 3, 55 (bonus 67)

# 55 bytes, H(X)=3.72, Based on bitpwner's 66. "Mix dog and cat fur."
i=0;print("Mdacfionauxgdtr"[i::5],end=" ."[i>3]);i+=1;i

# 67 bytes, H(X)=4.28. "Thanks for supporting Python development."
q=b"qx!%%0077C";a,b,*q=q;print((str(credits)*2)[49:][a:b],end='');q

# 60 bytes, H(X) = 3.51. "Fix the bed old pal"
s="Fixthebedoldpal";a,b,c,*s=s;print(a+b+c,end='. '[s>[]]);s

You mean it wraps around?

OK, some explanation on #2 (spoilers)

• credits is a python builtin that contains text I'd like to use. It's of a special type with a formatted repr so that you can just type it in the interactive interpreter and see nice output, so I have to str() it. I spent quite a bit of time looking at builtins for this, and "Thanks for supporting Python development" as a phrase was too good to pass up.

• Since there's a lot of text and I only want my 5 words, I want to store the start and end positions of each substring. That's in the bytes at the beginning. bytes objects in python3 act like arrays of integers when you use sequence operations on them.

• But the code can contain only printable characters, so I had to find an offset (49) that would make all my position values printable as characters.

• "Thanks" is near the beginning of the string while the other words are nearer the end, which means my position values were too far apart to all be in the printable range. Mulitplying the string by 2 makes another copy of "Thanks" that is nearer to the other words.

• Taking the [49:] slice of the string is one fewer source byte than adding 49 to both a and b.

• The construct used in all three answers is x=<value>;dostuff and increment;x. The trailing x doesn't do anything at all, but when combined with the next copy of the code it turns into xx=<value> which prevents the x counter from being overwritten.

• a,b,*q=q is perfectly normal Python 3 sequence unpacking.

Answer 6

C - 65

Comment abuse :)

char*z="Ah, \0the \0good \0ol' \0times!";
for(printf(z);*z++;);//

Because of this, the new lines are important and the code should be appended as follows:

char *z="Ah, \0the \0good \0ol' \0times!";
for(printf(z);*z++;);//char *z="Ah, \0the \0good \0ol' \0times!";
for(printf(z);*z++;);//...

Answer 7

CJam - 24

"TheguywasnotI"Lm3<]S*:L

Try it at http://cjam.aditsu.net/

Explanation:

Lm removes the letters contained in L (initially "") from "TheguywasnotI"
3< takes the first 3 letters
] collects the contents of the stack in an array
S* joins the array using space as a separator
:L assigns the resulting string to L (also leaving it on the stack)

Old version (28 bytes):

"He is but a dog."S/W):W=]S*

Explanation:

S/ splits by space
W):W increments W (initially W = -1)
= gets the W'th word
] collects the contents of the stack in an array
S* joins the array using space as a separator

Answer 8

BBC Basic, 40

Includes one newline. Would be 30 if the keywords could be considered as tokenised instead of ASCII.

I caught my girlfriend sleeping with the milkman, so I dumped her and I am sleeping with her sister out of revenge. As my ex do I! (five two-letter "words" with unique characters) wasn't enough entropy, so I added the tongue-out smiley at the end to make the entropy exactly 3.5. After all, in reality I have a fairly normal life, not some weird soap opera plot.

  READa$:PRINTa$;" ";
  DATAAs,my,ex,do,I:-P

Repeating the program 5 times we get

  READa$:PRINTa$;" ";
  DATAAs,my,ex,do,I:-P
  READa$:PRINTa$;" ";
  DATAAs,my,ex,do,I:-P
  READa$:PRINTa$;" ";
  DATAAs,my,ex,do,I:-P
  READa$:PRINTa$;" ";
  DATAAs,my,ex,do,I:-P
  READa$:PRINTa$;" ";
  DATAAs,my,ex,do,I:-P

Only the 5 READ statements are executed, and the first 5 items of data are read from the first DATA statement. the rest of the data is redundant. Output:

  (once)
  As 
  (5 times)
  As my ex do I:-P 

Answer 9

J - 42 char

I could go for a shorter phrase, but why? It wouldn't be my favourite.

(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '

This works because of J's monad/dyad duality: every verb can be invoked as a monad—with one argument to its right—or as a dyad—with an argument on the left and another on the right.

Consider the following session with the J REPL:

   'You multiplied 6 by 9. '
You multiplied 6 by 9.
   'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. '
You multiplied 6 by 9. You multiplied 6 by 9.
   ;: 'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. '   NB. break into words
+---+----------+-+--+--+---+----------+-+--+--+
|You|multiplied|6|by|9.|You|multiplied|6|by|9.|
+---+----------+-+--+--+---+----------+-+--+--+
   (#\) ;: 'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. '             NB. count off
1 2 3 4 5 6 7 8 9 10
   (6 | #\) ;: 'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. '         NB. mod 6
1 2 3 4 5 0 1 2 3 4
   (1 = 6 | #\) ;: 'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. '
1 0 0 0 0 0 1 0 0 0
   (#~ 1 = 6 | #\) ;: 'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. '  NB. select
+---+----------+
|You|multiplied|
+---+----------+
   (#~ 1 = 6 | #\)&.;: 'You multiplied 6 by 9. ' , 'You multiplied 6 by 9. ' NB. undo ;:
You multiplied

There, , is treated as a dyad, because it is between two arguments, and (#~1=6|#\)&.;: is a monad because it has no left argument. So if we had a verb that could act like , when dyadic and (#~1=6|#\)&.;: when monadic, we'd be set.

As you may have already guessed, such a conjunction exists and it looks like :. Monadic f :g is equivalent to f, and it is equivalent to g when dyadic. This solves the problem.

Examples, which you can try for yourself at tryj.tk:

   (#~1=6|#\)&.;: :,'You multiplied 6 by 9. '
You
   (#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '
You multiplied
   (#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '
You multiplied 6
   (#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '
You multiplied 6 by
   (#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '(#~1=6|#\)&.;: :,'You multiplied 6 by 9. '
You multiplied 6 by 9.

And yes, the nature of the inverse of ;: makes it so that there are no trailing spaces.

^{Using It is by a rope. as the phrase gives 35 char: (#~1=6|#\)&.;: :,'It is by a rope.'. We don't need the trailing space like we do for my sentence, for arcane, ;:-based reasons.}

Answer 10

CJam, 24 bytes

"LwOtmiaKoezs"W):W>5%]S*

If run five times, it prints Liz was OK to me. Punctuation not included, sorry.

How it works

"LwOtmiaKoezs"  " Push that string. ";
W):W            " Push W (initially -1), increment and save the result in W. ";
>               " Shift that many characters from the string. ";
5%              " Select every fifth character, starting with the first. ";
]S*             " Wrap the stack in an array and join its strings using spaces. ";

Answer 11

Pyth, 32

p?kqZ4d@P"It is by a rope."dZ~Z1

Phrase: "It is by a rope."

Entropy: 3.5

How it works:

p means print with specified separator.

The first argument, ?kqZ4d, gives the separator. ?kqZ4d means k if Z==4 else d. k is '', while d is ' '.

The second argument, the value to be printed, is generated by splitting (P) on space (d), and the indexing into that list (@) at Z.

Finally, Z, which is automatically initialized to 0, is incremented by 1 (~Z1).

Answer 12

Golfscript, 53

This one was fun.

{'1'-print}:puts;.'You; are; not; a; duck.'';'/\,=\1+

Phrase: "You are not a duck." (which is completely true; entropy 3.5110854081804286)

Explanation:

The stack will start as '' on the first "run" (since no STDIN is provided). '1's are appended to this to signify how many times the code has been pasted in.

{'1'-print}:puts;             # Hacky stuff (see below)
.                             # Stack: '' ''
'You; are; not; a; duck.'';'/ # Initialize the array of words
\,                            # Get the length of the string of '1's (0)
                              # Stack: '' [words] 0
=                             # Stack: '' 'You'
\1+                           # Stack: 'You' '1'

Now what happens on the second run:

{'1'-print}:puts;             # Hacky stuff (see below)
.                             # Stack: 'You' '1' '1'
'You; are; not; a; duck.'';'/ # Initialize the array of words
\,                            # Get the length of the string of '1's (1)
                              # Stack: 'You' '1' [words] 1
=                             # Stack: 'You' '1' ' are'
\1+                           # Stack: 'You' ' are' '11'

And so on.

"But," you're thinking, "how do you get the 1s to not output?" Ah, that's the fun hacky part. Golfscript implements puts (which is called when the program ends) like this:

{print n print}:puts;

I simply changed it to

{'1'-print}:puts;

So that the 1s are suppressed from the final output.

Answer 13

Ruby, 50

puts'The fat pig can fly.'[0..File.size($0)/12-1]#

This uses its own length to determine how many of the words to print. Its repeats are otherwise ignored by ending in the comment character, #. Phrase borrowed from bitpwner: it's very convenient having a short phrase with the same number of letters in each word.

Since each word+ending is 4 characters, the formula would be, e.g. for 56-length program: (File.size($0)/56)*4 - 1, but I can divide ahead of time, 56/4 = 14, so File.size($0)/14 - 1, saving a few characters. 50 isn't a multiple of 4, but 12 is close enough for the range needed.

Answer 14

Chip, 165+3 = 168 bytes

+3 for flag -w

| ,z `Z`Z  `Z
| |ZZZ>Z>ZZZ>ZZZZ
>((((((((((((((((
|)-)))-)-)))-))))g
|)d)xx-x-)xx-))x)e
||b+))-x-x))-x)xc
|`v))xa(-x(x-((^d
|*`.))d| b | b
|Z~<b( |~Zf|
>~T| | |   |

"I won a red suit" (3.5) (I actually haven't won any such thing) (...yet)

Note the trailing newline, so the concatenated copy appears below the existing code.

Try it online! (the original)
Try it online! (the original, plus all four copies)

This is a bit of a tangled mess. It turned out that the trickiest bit was the termination condition. (My first iteration printed the word(s), followed by an endless stream of null bytes...).

How it works

First the phrase:
12 unique characters + 4 spaces = exactly 3.5 entropies.

And the code:
Each copy prints the first word, then tells the copy below to print the next word. If there is only one instance, there is no second copy, so nothing except the first word is printed.

If there are two copies, both will print the first word simultaneously (the bytes are OR'd together so it's fine), then only the second copy will print the second word.

If all five copies are present, all will print the first word, etc, etc, and the fifth copy will print the last word by itself.

The termination circuit will terminate the program as soon as all copies are not actively printing.

Answer 15

Ruby, 63

+1;puts"See Dick and Jane run!"[/(.*?( |!)){#$.}/]if($.+=1)==$.

Answer 16

Perl, 37

print qw(My IQ is not me!)[$i++].' ';

Similar to what comperendinous had, but taking advantage of perl's qw to save a few more characters.

Answer 17

Rebmu message length + 27

Were we to go with "My IQ is not me!" that would be 43. But I support this message:

uV?'s[S[{The}{rebellion}{against}{software}{complexity.}]]proTKsPROsp

Equivalent Rebol/Red:

unless value? 's [
    s: [{The}{rebellion}{against}{software}{complexity.}]
]

print/only take s
print/only space

Rebol has 3 basic conditionals: IF, EITHER, and UNLESS. UNLESS is equivalent to IF NOT but can be more clear: "Always do the following UNLESS this condition happens to be true."

In this case the condition is that we test is to see if the symbol S has been given a value in the current context. We have to use a quote on it, because attempting to use an unquoted S in a conditional expression would evaluate it and possibly raise an error. (value? doesn't quote its parameter by default because you might want to have which symbol you are checking be in a variable, e.g. sym: 's then if value? sym [...] would actually check if S was defined, not SYM)

Only the first paste of the program will assign the series of strings to S. Successive pastes will take a string from the head of the series and pass it to PRINT/ONLY which will print its argument without adding a line feed.

(Note: PRINT/ONLY is a suggested replacement way of saying PRIN, which is being considered in Rebol 3 and Red; a print replacement is now being tested in Rebmu.)

Answer 18

AHK, 44 bytes

i++
Send % SubStr("He is an OK ex",i*3-2,3)

Note the newline at the end. The only clever thing here is that the string is all 3-letter words so we don't have to split anything. Instead, we just pull a substring based on i. Output is to the active screen as if it was typed on the keyboard.

Answer 19

Pxem, 0 bytes: content + 170 bytes: filename.

H(X) = 3.57662

• Filename: .o.c.c.zXXOnepigcannotfly.a.o.o.o
• Content is empty.

Try it online!

How it works

• First .o pops to output, if any
• .c.c.zXXOnepigcannotfly.a is done if and only if stack is empty.
• .o.o.o to pop top three to output.
• A space at last to push a space.

Answer 20

Batch 160 bytes

H(X) = 3.61437

@Set s=Get out by Six pm.
@Set/ai+=0&Set "n=0"&Set "_=%s: ="&Cmd/Von/C "if !n!==!i! Echo(!_!"&Set/An+=1&Cmd/Von/C"if !n!!i!==44 Echo(pm."&Set "_=%"
@Set/ai+=1

• Split string on whitespace , match split instance count n with execution instance count i to output word.
• As a result of substring parsing, the 5th instance will never match during substring modification, so a 0 index is used and the final 'word' of the phrase is output on the 5 instance by matching i = n = 4.

Note: requires a fresh cmd instance to execute between runs when appending the code, as otherwise variable values will persist and affect the output - Alternately, execute the following command in cmd.exe to reset the variables: set /a i=n=0

Answer 21

Japt -S, 17 bytes

Includes unprintables between the backticks.

`âK0dÊŠ…`ò3 ¯°T)

Test it, repeated 5 times

`...`ò3 ¯°T)
`...`            :Compressed string "thecatandhishat"
     ò3          :Partitions of length 3
        ¯        :Slice from index 0 to
         °T      :  Prefix increment T, initially 0
           )     :End slice
                 :Implicit output joined with spaces

Answer 22

Javascript (53)

I took the text from aditsu as I'm not doing anything fancy with the text, so that the words chosen are somewhat irrelevant for the solution (except for byte count).

var i=i|0;alert("He 0is 0but 0a 0dog".split(0)[i++]);

Does alert count in this case? Edit: Reading the rules it probably doesn't as I'm not joining the strings with spaces. I'll add spaces to make it fair.

Also note that the expensive var is actually relevant in this case.

Answer 23

Perl, 43 56

print substr'Mine was not Red 5!',4*$i++,4;

I accept that I can't win this one. My original attempt explains why:

@a=('This',' code',' is',' too',' long.');print$a[$i++];

Answer 24

Lua, 77

A pretty simple solution:

i=(i or 0)+1;io.write((i==1 and""or" ")..("Thebigfoxwasup."):sub(3*i-2,3*i))

(H(X)=4.23)

Answer 25

Javascript, 138

g=this;clearTimeout(g.t);g.i|=0;i++;g.t=setTimeout(
    function(){console.log(["I'll","sleep","when","I'm","dead."].slice(0,i).join(' '))},0);

(the additional newline is added for readability only)

Prints I'll sleep when I'm dead. Uses a timer to make sure the output is only printed once

Answer 26

Pure Bash, 51 bytes

a=(All you need is Love!)
printf "${i:+ }${a[i++]}"

H(X) = 3.59447

This could be golfed down a bit more by poaching one of the shorter phrases, but I'm happy to stick with Descartes' Lennon's most famous quote. (Sorry @Descartes, but all words need to be unique).

Output:

$ ./phrase.sh 
All$ cat phrase.sh phrase.sh phrase.sh > phrase3.sh
$ chmod +x phrase3.sh 
$ ./phrase3.sh 
All you need$ 
$ cat phrase.sh phrase.sh phrase.sh phrase.sh phrase.sh > phrase.sh
$ chmod +x phrase5.sh 
$ ./phrase5.sh 
All you need is Love!$ 

Takes care to insert spaces between words, but no leading or trailing spaces.

Relies on the fact that in bash, undefined variables, when expanded as strings have the value "", but when expanded arithmetically have the value 0.

Answer 27

PHP 89 78 char

Its a little verbose, and most definitely won't win, but it was fun anyway. Here's what I came up with

Phrase:

code golf is pretty fun

Entropy = 3.82791

Code:

<?
$i=(isset($i)?$i+1:0);
$w=["code","golf","is","really","fun"];
echo $w[$i].";

Golfed:

<?$i=(isset($i)?$i+1:0);$w=["code","golf","is","really","fun"];echo $w[$i].

Answer 28

Python3 - 122 bytes

Open the pod bay doors [HAL]

I guess I'll earn some nerd cred with this one. If only the question would allow one more word...

What my program does is takes the filename (p.py is the base) and checks how many times the base name is iterated. It then takes slices from a string n times. n being the number of ps in the filename.

import sys,re
for i in range(len(re.findall(re.compile('p'),sys.argv[0]))):print('Otpbdphoaoeedyon   r    s'[i::5],end='')

---

~ $ python p.py
Open

~ $ python pp.py
Open the

~ $ python ppp.py
Open the pod

~ $ python pppp.py
Open the pod bay

~ $ python ppppp.py
Open the pod bay doors

The benefit of the regex is that the program can be called whatever you like and it will still work (providing you change the basename in the code): my original program was called golfed.py.

Answer 29

05AB1E, 21 bytes (Noncompeting)

“€Œ‰‹€‡Øš‹É.“ª#¾è¼?ð?

Try it online!

Uses:

This works for literally anything. 
H(x) = 4.02086

Explanation

“€Œ‰‹€‡Øš‹É.“ª#¾è¼?ð?
“€Œ‰‹€‡Øš‹É.“ª        # Pushes "This works for literally anything."
              #       # Split on spaces
               ¾è     # get element at index of counter_variable (default 0)
                 ¼    # Increment the counter_variable
                  ?   # Print the selected element
                   ð? # Prints a space

Answer 30

Stax, 24

`nH+~mJp@Z_Iy.5!`j|d:/dJ

Run and debug it

Quote: Some animals are more equal.