Golf Text into DNA

Question

Text to DNA golf

Challenge

Convert input into a DNA output.

Algorithm

• Convert text into ASCII code points (e.g. codegolf -> [99, 111, 100, 101, 103, 111, 108, 102])
• String the ASCII codes together (e.g. 99111100101103111108102)
• Convert to binary (e.g. 10100111111001101001011010001000011001101011011110000110010111111011000000110)
• Pad 0s onto the end to make an even number of characters (e.g. 101001111110011010010110100010000110011010110111100001100101111110110000001100)
• Replace 00 with A, 01 with C, 10 with G, and 11 with T (e.g. GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA)
• Output

Test Cases

codegolf > GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA
ppcg > GGCTAATTGTCGCACTT
} > TTGG (padding)

Specifications

• This is code-golf
• Your program must accept spaces in input.
• Your program must work for codegolf.

Answer 1

Jelly, 15 13 bytes

OVBs2UḄị“GCTA

Try it online! or verify all test cases.

How it works

OVBs2UḄị“GCTA    Main link. Argument: s (string)

O                Ordinal; replace each character with its code point.
 V               Eval. This converts the list to a string before evaluating, so it
                 returns the integer that results of concatenating all the digits.
  B              Binary; convert from integer to base 2.
   s2            Split into chunks of length 2.
     U           Upend; reverse the digits of each chunk.
                 Reversing means that we would have to conditionally PREPEND a zero
                 to the last chunk, which makes no difference for base conversion.
      Ḅ          Unbinary; convert each chunk from base 2 to integer.
                 `UḄ' maps:
                     [0, 1   ] -> [1,    0] -> 2
                     [1, 0(?)] -> [0(?), 1] -> 1
                     [1, 1   ] -> [1,    1] -> 3
                     [0, 0(?)] -> [0(?), 0] -> 0
       ị“GCTA    Replace each number by the character at that index.
                 Indexing is 1-based, so the indices are [1, 2, 3, 0].

Answer 2

CJam, 24 23 bytes

Thanks to Dennis for saving 1 byte in a really clever way. :)

l:isi2b2/Wf%2fb"AGCT"f=

Test it here.

Explanation

Very direct implementation of the specification. The only interesting bit is the padding to an even number of zeros (which was actually Dennis's idea). Instead of treating the digits in each pair in the usual order, we make the second bit the most significant one. That means, ending in a single bit is identical to appending a zero to it, which means we don't have to append the zero at all.

l          e# Read input.
:i         e# Convert to character codes.
si         e# Convert to flat string and back to integer.
2b         e# Convert to binary.
2/         e# Split into pairs.
Wf%        e# Reverse each pair.
2fb        e# Convert each pair back from binary, to get a value in [0 1 2 3].
"AGCT"f=   e# Select corresponding letter for each number.

Answer 3

Python 2, 109 103 bytes

lambda s,j=''.join:j('ACGT'[int(j(t),2)]for t in
zip(*[iter(bin(int(j(`ord(c)`for c in s))*2)[2:])]*2))

Test it on Ideone.

Answer 4

Python 3, 130 bytes.

Saved 2 bytes thanks to vaultah.
Saved 6 bytes thanks to Kevin Lau - not Kenny.

I hate how hard it is to convert to binary in python.

def f(x):c=bin(int(''.join(map(str,map(ord,x)))))[2:];return''.join('ACGT'[int(z+y,2)]for z,y in zip(*[iter(c+'0'*(len(c)%2))]*2))

Test cases:

assert f('codegolf') == 'GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA'
assert f('ppcg') == 'GGCTAATTGTCGCACTT'

Answer 5

Ruby, 59 bytes

$_='%b0'.%$_.bytes*''
gsub(/../){:ACGT[$&.hex%7]}
chomp'0'

A full program. Run with the -p flag.

Answer 6

Ruby, 80 bytes

->s{s=s.bytes.join.to_i.to_s 2;s+=?0*(s.size%2)
s.gsub(/../){"ACGT"[$&.to_i 2]}}

Answer 7

Mathematica, 108 bytes

{"A","C","G","T"}[[IntegerDigits[Mod[Floor@Log2@#,2,1]#&@FromDigits[""<>ToString/@ToCharacterCode@#],4]+1]]&

Takes a string as input, and outputs a list of bases.

Answer 8

Python 3, 126 bytes

lambda v:"".join(["ACGT"[int(x,2)]for x in map(''.join,zip(*[iter((bin(int("".join([str(ord(i))for i in v])))+"0")[2:])]*2))])

Answer 9

Pyth, 25 bytes

sm@"ACGT"id2Pc.B*4sjkCMQ2

Try it here!

Explanation

Burrowing the padding trick from Martins CJam answer.

sm@"ACGT"id2Pc.B*4sjkCMQ2    # Q = input

                     CMQ     # Map each character of Q to its character code
                  sjk        # Join into one string and convert to an integer
              .B*4           # Mulitply with 4 and convert to binary
             c          2    # Split into pairs
            P                # Discard the last pair
 m                           # Map each pair d
         id2                 # Convert pair from binary to decimal
  @"ACGT"                    # Use the result ^ as index into a lookup string
s                            # Join the resulting list into on string

Answer 10

05AB1E, 23 bytes

Code:

SÇJb00«2÷¨C3210"TGCA"‡á

Uses CP-1252 encoding. Try it online!.

Answer 11

Java, 194 bytes

String a(int[]a){String s="",r=s;for(int i:a)s+=i;s=new BigInteger(s).toString(2)+0;for(int i=0,y,n=48;i<(s.length()/2)*2;r+=s.charAt(i++)==n?y==n?'A':'G':y==n?'C':'T')y=s.charAt(i++);return r;}

Ungolfed

String a(int[] a) {
    String s = "", r = s;
    for (int i : a) s += i;
    s = new BigInteger(s).toString(2) + 0;
    for (int i = 0, y, n = 48; i < (s.length() / 2) * 2; 
        r += s.charAt(i++) == n 
                 ? y == n 
                 ? 'A' 
                 : 'G' 
                 : y == n 
                 ? 'C' 
                 : 'T')
        y = s.charAt(i++);
    return r;
}

Note

• Input is an array of chars (which should count as a form of String), parameter is of type int[] because thats one byte saved over char[].

Output

Input:  codegolf
Output: GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA

Input:  .
Output: GTG

Input:  }
Output: TTGG

Input:  wow
Output: TGATAGTTGTGCTG

Input:  programming puzzles
Output: GTGTCAGAGTTGAAGGCCGTTCCGCAGTGCATTTGGCTCGTCTGGTGTCTACTAGCCTGCGAGAGGAGTTACTTTGGATCCTTGACTTGT

Answer 12

MATL, 21 bytes

'CGTA'joV4Y2HZa2e!XB)

Try it online!

Explanation

'CGTA'   % Push string to be indexed into
j        % Take input string
o        % Convert each char to its ASCII code
V        % Convert to string (*). Numbers are separated by spaces
4Y2      % Push the string '0123456789'
H        % Push number 2
Za       % Convert string (*) from base '0123456789' to base 2, ignoring spaces
2e       % Reshape into a 2-column matrix, padding with a trailing 0 if needed
!        % Transpose
XB       % Convert from binary to decimal
)        % Index into string with the DNA letters. Indexing is 1-based and modular

Answer 13

Pyth, 23 bytes

sm@"AGCT"i_d2c.BsjkCMQ2

Try it online!

Explanation

Borrowing the trick from Dennis' Jelly answer.

sm@"AGCT"i_d2c.BsjkCMQ2
                   CMQ   convert each character to its byte value
                sjk      convert to a string and then to integer
              .B         convert to binary
             c        2  chop into pairs
 m         d             for each pair:
          _                  reverse it
         i  2                convert from binary to integer
  @"AGCT"                    find its position in "AGCT"
s                        join the string

Answer 14

Groovy, 114 bytes

{s->'ACGT'[(new BigInteger(((Byte[])s).join())*2).toString(2).toList().collate(2)*.with{0.parseInt(it.join(),2)}]}

Explanation:

{s->
    'ACGT'[ //access character from string
        (new BigInteger( //create Big Integer from string
           ((Byte[])s).join() //split string to bytes and then join to string
        ) * 2) //multiply by 2 to add 0 at the end in binary
        .toString(2) //change to binary string
        .toList() //split to characters
        .collate(2) //group characters by two
        *.with{
            0.parseInt(it.join(),2) //join every group and parse to decimal
        }
     ]
}

Answer 15

Python 2.7, 135 bytes

def f(A):g=''.join;B=bin(int(g(map(str,map(ord,A)))))[2:];B+=len(B)%2*'0';return g('ACGT'[int(B[i:i+2],2)] for i in range(len(B))[::2])

Ungolfed:

def f(A):
    g = ''.join
    B = bin(int(g(map(str,map(ord,A)))))[2:] # convert string input to binary
    B += len(B)%2 * '0' # add extra 0 if necessary
    return g('ACGT'[int(B[i:i+2],2)] for i in range(len(B))[::2]) # map every two characters into 'ACGT'

Output

f('codegolf')
'GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA'

Answer 16

Julia 0.4, 77 bytes

s->replace(bin(BigInt(join(int(s)))),r"..?",t->"AGCT"[1+int("0b"reverse(t))])

This anonymous function takes a character array as input and returns a string.

Try it online!

Answer 17

J, 52 bytes

 3 :'''ACGT''{~#._2,\#:".,&''x''":(,&:(":"0))/3&u:y'

Usage: 3 :'''ACGT''{~#._2,\#:".,&''x''":(,&:(":"0))/3&u:y' 'codegolf' ==> GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA

Answer 18

Javascript ES7, 105 103 bytes

s=>((+[for(c of s)c.charCodeAt()].join``).toString(2)+'0').match(/../g).map(x=>"ACGT"['0b'+x-0]).join``

The ES7 part is the for(c of s) part.

ES6 version, 107 105 bytes

s=>((+[...s].map(c=>c.charCodeAt()).join``).toString(2)+'0').match(/../g).map(x=>"ACGT"['0b'+x-0]).join``

Ungolfed code

dna = (str)=>{
  var codes = +[for(c of str)c.charCodeAt()].join``;
  var binaries = (codes.toString(2)+'0').match(/../g);
  return binaries.map(x=>"ACGT"['0b'+x-0]).join``
}

This is my first try at golfing on PPCG, feel free to correct me if something's wrong.

Thanks @AlexA for the small improvement.

Answer 19

Common Lisp (Lispworks), 415 bytes

(defun f(s)(labels((p(e f)(concatenate'string e f)))(let((b"")(d""))(dotimes(i(length s))(setf b(p b(write-to-string(char-int(elt s i))))))(setf b(write-to-string(parse-integer b):base 2))(if(oddp #1=(length b))(setf b(p b"0")))(do((j 0(+ j 2)))((= j #1#)d)(let((c(subseq b j(+ j 2))))(cond((#2=string="00"c)(setf d(p d"A")))((#2#"01"c)(setf d(p d"C")))((#2#"10"c)(setf d(p d"G")))((#2#"11"c)(setf d(p d"T")))))))))

ungolfed:

(defun f (s)
  (labels ((p (e f)
             (concatenate 'string e f)))
  (let ((b "") (d ""))
    (dotimes (i (length s))
      (setf b
            (p b
               (write-to-string
                (char-int (elt s i))))))
    (setf b (write-to-string (parse-integer b) :base 2))
    (if (oddp #1=(length b))
        (setf b (p b "0")))
      (do ((j 0 (+ j 2)))
          ((= j #1#) d)
        (let ((c (subseq b j (+ j 2))))
          (cond ((#2=string=  "00" c)
                 (setf d (p d "A")))
                ((#2# "01" c)
                 (setf d (p d "C")))
                ((#2# "10" c)
                 (setf d (p d "G")))
                ((#2# "11" c)
                 (setf d (p d "T")))))))))

Usage:

CL-USER 2060 > (f "}")
"TTGG"

CL-USER 2061 > (f "golf")
"TAAAAATTATCCATAAATA"

Answer 20

Perl, 155 148 137 + 1 (-p flag) = 138 bytes

#!perl -p
s/./ord$&/sge;while($_){/.$/;$s=$&%2 .$s;$t=$v="";$t.=$v+$_/2|0,$v=$_%2*5
for/./g;s/^0// if$_=$t}$_=$s;s/(.)(.)?/([A,C],[G,T])[$1][$2]/ge

Test it on Ideone.

Answer 21

Perl 6, 57 + 1 (-p flag) = 58 bytes

$_=(+[~] .ords).base(2);s:g/..?/{<A G C T>[:2($/.flip)]}/

Step by step explanation:

-p flag causes Perl 6 interpreter to run code line by line, put current line $_, and at end put it back from $_.

.ords - If there is nothing before a period, a method is called on $_. ords method returns list of codepoints in a string.

[~] - [] is a reduction operator, which stores its reduction operator between brackets. In this case, it's ~, which is a string concatenation operator. For example, [~] 1, 2, 3 is equivalent to 1 ~ 2 ~ 3.

+ converts its argument to a number, needed because base method is only defined for integers.

.base(2) - converts an integer to a string in base 2

$_= - assigns the result to $_.

s:g/..?/{...}/ - this is a regular expression replacing any (:g, global mode) instance of regex ..? (one or two characters). The second argument is a replacement pattern, which in this case in code (in Perl 6, curly brackets in strings and replacement patterns are executed as code).

$/ - a regex match variable

.flip - inverts a string. It implicitly converts $/ (a regex match object) to a string. This is because a single character 1 should be expanded to 10, as opposed to 01. Because of that flip, order of elements in array has G and C reversed.

:2(...) - parses a base-2 string into an integer.

<A G C T> - array of four elements.

...[...] - array access operator.

What does that mean? The program gets list of all codepoints in a string, concatenates them together, converts them to base 2. Then, it replaces all instances of two or one character into one of letters A, G, C, T depending on flipped representation of a number in binary.

Answer 22

Hoon, 148 138 bytes

|*
*
=+
(scan (reel +< |=({a/@ b/tape} (weld <a> b))) dem)
`tape`(flop (turn (rip 1 (mul - +((mod (met 0 -) 2)))) |=(@ (snag +< "ACGT"))))

"abc" is a list of atoms. Interpolate them into strings (<a>) while folding over the list, joining them together into a new string. Parse the number with ++dem to get it back to an atom.

Multiply the number by (bitwise length + 1) % 2 to pad it. Use ++rip to disassemble every two byte pair of the atom into a list, map over the list and use the number as an index into the string "ACGT".

> =a |*
  *
  =+
  (scan (reel +< |=({a/@ b/tape} (weld <a> b))) dem)
  `tape`(flop (turn (rip 1 (mul - +((mod (met 0 -) 2)))) |=(@ (snag +< "ACGT"))))
> (a "codegolf")
"GGCTTGCGGCCGGAGACGCGGTCTGACGCCTTGTAAATA"
> (a "ppcg")
"GGCTAATTGTCGCACTT"
> (a "}")
"TTGG"