Snakify a String

Question 1

A snakified string looks like this:

T AnE eOf ifi ing
h s x l A k e r
isI amp Sna dSt

Your Task

Take a string s and a size n, then output the snakified string. The inputs ThisIsAnExampleOfaSnakifiedString and 3 would produce the example above.

Specifications

s will only contain ASCII characters between code points 33 and 126 inclusive (no spaces or newlines).
s will be between 1 and 100 characters long.
n is an integer representing the size of each output string segment. Each line of characters (up/down or left/right) that make up the curves in the "snake" is n characters long. See the test cases for examples.
n will be between 3 and 10 inclusive.
The output string always starts pointing downwards.
Trailing spaces on each line are allowed.
Trailing newlines at the end of the output are also allowed.
Leading spaces are not allowed.
code-golf means shortest code in bytes wins.

Test Cases

a 3
a
----------
Hello,World! 3
H Wor
e , l
llo d!
----------
ProgrammingPuzzlesAndCodeGolf 4
P ngPu Code
r i z d G
o m z n o
gram lesA lf
----------
IHopeYourProgramWorksForInputStringsWhichAre100CharactersLongBecauseThisTestCaseWillFailIfItDoesNot. 5
I gramW tStri 100Ch gBeca CaseW DoesN
H o o u n e a n u t i t o
o r r p g r r o s s l I t
p P k n s A a L e e l f .
eYour sForI Which cters ThisT FailI
----------
!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ 10
! <=>?@ABCDE `abcdefghi
" ; F _ j
# : G ^ k
$ 9 H ] l
% 8 I \ m
& 7 J [ n
' 6 K Z o ~
( 5 L Y p }
) 4 M X q |
*+,-./0123 NOPQRSTUVW rstuvwxyz{

Question 2

I'm guessing the next challenge will be to convert a snakified string back to the original 2 parameters ...

Question 3

@abligh I had no further plans, but that actually sounds like a decent idea. There could be some form of duplicate though, so I'll need to check that first. Stay tuned!

Question 4

the reverse challenge would be more fun if the snake can be an arbitrary shape ...

Question 5

@abligh That's exactly what I was planning on doing haha!

Question 6

@abligh Done!

Question 7

Ruby, 87 bytes

->s,n{p=0
a=(' '*(w=s.size)+$/)*n
w.times{|i|a[p]=s[i];p+=[w+1,1,-w-1,1][i/(n-1)%4]}
a}

Some minor abuse of the rule Trailing spaces on each line are allowed. Each line of output is w characters long, plus a newline, where w is the length of the original string, i.e. long enough to hold the whole input. Hence there is quite a lot of unnecessary whitespace to the right for large n.

Ungolfed in test program

f=->s,n{
 p=0 #pointer to where the next character must be plotted to
 a=(' '*(w=s.size)+$/)*n #w=length of input. make a string of n lines of w spaces, newline terminated
 w.times{|i| #for each character in the input (index i)
 a[p]=s[i] #copy the character to the position of the pointer
 p+=[w+1,1,-w-1,1][i/(n-1)%4] #move down,right,up,right and repeat. change direction every n-1 characters
 }
a} #return a
puts $/,f['a',3]
puts $/,f['Hello,World!',3]
puts $/,f['ProgrammingPuzzlesAndCodeGolf',4]
puts $/,f['IHopeYourProgramWorksForInputStringsWhichAre100CharactersLongBecauseThisTestCaseWillFailIfItDoesNot.',5]
puts $/,f['!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~',10]

Question 8

Pyth, (削除) 48 (削除ここまで) (削除) 45 (削除ここまで) (削除) 44 (削除ここまで) (削除) 43 (削除ここまで) 42 bytes

=Y0juXGZX@G~+Z-!J%/HtQ4q2J~+Y%J2@zHlzm*;lz

Try it online.

This approach does the same trailing whitespace abuse as the Ruby answer.

Question 9

Crossed out 44 is still 44... still.

Question 10

JavaScript (ES6), 143 bytes

(s,n)=>[...s].map((c,i)=>(a[x][y]=c,i/=n)&1?y++:i&2?x--:x++,a=[...Array(n--)].map(_=>[]),x=y=0)&&a.map(b=>[...b].map(c=>c||' ').join``).join`\n`

Where \n represents a literal newline. Ungolfed:

function snakify(string, width) {
 var i;
 var result = new Array(width);
 for (i = 0; i < width; i++) result[i] = [];
 var x = 0;
 var y = 0;
 for (i = 0; i < string.length; i++) {
 result[x][y] = string[i];
 switch (i / (width - 1) & 3) {
 case 0: x++; break;
 case 1: y++; break;
 case 2: x--; break;
 case 3: y++; break;
 }
 for (i = 0; i < width; i++) {
 for (j = 0; j < r[i].length; j++) {
 if (!r[i][j]) r[i][j] = " ";
 }
 r[i] = r[i].join("");
 }
 return r.join("\n");
}

Question 11

Pyth, (削除) 85 (削除ここまで) (削除) 74 (削除ここまで) 59 bytes

~~(削除) Kl@Q0J0=Y*]d-+*@Q1K@Q1 1FNr1@Q1=XY-+*KNN1b;VK=XYJ@@Q0N=+J@[+K1 1-_K1 1).&3/N-@Q1 1;sY (削除ここまで)~~

~~(削除) =G@Q1=H@Q0KlHJ0=Y*]dt+*GKGFNr1G=XYt+*KNNb;VK=XYJ@HN=+J@[hK1t_K1).&3/NtG;sY (削除ここまで)~~

Klz=Ym;+*QKQVQ=XYt+*KhNhNb;VK=XYZ@zN=+Z@[hK1_hK1).&3/NtQ;sY

Thanks to @FryAmTheEggman for greatly helping me !

Golfed as much as I could. Try it here ! For some reason, line wrapping make the output weird. You may want to have a look at the output on full page

Explanation

Breathe a second, and focus. This can be broken down in three sections, like almost any "classic" algorithm.

The first section

It's where variables are initialized. It can be splitted into two parts :

Klz=Ym;+*QKQ
Klz Assign len(input[0]) to K. (length of input String)
 =Ym;+*QKQ Assign an empty list to Y of length K*input[1]-input[1]-1, where input[1] is the size of the snake 
 (thus the height of the final string)

the second part :

VQ=XYt+*KhNhNb;
VQ For N in range(0, input[1]), where input[1] is the size of the snake 
 = Assign to Y. Y is implicit, it is the last variable we used.
 XYt+*KhNhNb Y[K*N+N-1]="\n". Can be broken down in four parts :
 X Replace function. X <A: list> <B: int> <C: any> is A[B]=C
 Y A: The array we initialized in the first section.
 t+*KhNhN B: K*(N+1)+N+1 (N is the for loop variable)
 b C: Newline character ("\n")
 ; End the loop.

The second section

It contains the actual logic.

VK=XYZ@zN=+Z@[hK1_hK1).&3/NtQ;
VK For N in range(0, K), where K is the length of the input string (see first section)
 = Assign to Y. Y is implicit, it is the last variable we used.
 XYZ@zN Same as in section 2. This is a replacement function. Y[Z] = input[0][N]. Z is initially 0.
 =+Z@[hK1_hK1).&3/NtQ Again this can be broken down :
 =+Z Add to Z
 [hK1_hK1) Array containing directions. Respectively [K+1, 1, -K-1, 1]
 @ .&3/NtQ Lookup in the array, on index .&3/N-@Q1 1:
 .&3 Bitwise AND. .& <int> <int>
 /NtQ (input[1]-1)/N, where input[1] is the size of the snake
 ; End the loop

The third section

This is the output part. Not really interesting...

sY Join the array Y. Implicitly print.

BONUS

I wrote the pyth program from this python script.

input=["ThisIsAnExampleOfASnakifiedString", 4];
width=len(input[0]);
height=input[1];
pointer=0;
directions = [width+1,1,-width-1,1] #Respectively Down, right, up, right (left is replaced by right because of snake's nature. Doesn't go left).
output=[' ' for i in range(0, width*height+height-1)];
for N in range(1, height):
 output[width*N+N-1]="\n";
for N in range(0, len(input[0])): 
 output[pointer]=input[0][N];
 pointer+=directions[3&(N/(height-1))];
print "".join(output);

Question 12

JavaScript (ES6), 122 bytes

document.write("<pre>"+(
// --- Solution ---
s=>n=>[...s].map((c,i)=>(a[p]=c,p+=[l+1,1,-l-1,1][i/n%4|0]),p=0,a=[...(" ".repeat(l=s.length)+`
`).repeat(n--)])&&a.join``
// ----------------
)("IHopeYourProgramWorksForInputStringsWhichAre100CharactersLongBecauseThisTestCaseWillFailIfItDoesNot.")(5))

Same algorithm as @LevelRiverSt's answer.

Question 13

C, 138 bytes

char*h[]={"\e[B\e[D","","\e[A\e[D",""},t[999];i;main(n){system("clear");for(scanf("%s%d",t,&n),--n;t[i];++i)printf("%c%s",t[i],h[i/n%4]);}

This uses ANSI escapes. Works in linux terminal.

Ungolfed:

char*h[]={"\e[B\e[D","","\e[A\e[D",""},
 /* cursor movement - h[0] moves the cursor one down and one left,
 h[2] moves the cursor one up and one left. */
t[999];i;
main(n){
 system("clear");
 for(scanf("%s%d",t,&n),--n;t[i];++i)
 printf("%c%s",t[i],h[i/n%4]);
}

Question 14

JavaScript (ES6), 131

Algorithm: mapping the position x,y in output to the index in the input string, somehow like this (unrelated) answer.

I borrowed from @LevelRiverSt the trick of keeping the horizontal width equal to the input length.

a=>m=>eval('for(--m,t=y=``;y<=m;++y,t+=`\n`)for(x=0;a[x];)t+=a[2*(x-x%m)+((h=x++%(2*m))?h-m?!y&h>m?h:y<m|h>m?NaN:m+h:m-y:y)]||`.`')

Less golfed

This was the first working draft before golfing

f=(a,n)=>{
 l=a.length
 m=n-1
 s=m*2 // horizontal period
 b=-~(~-l/s)*m // total horizontal len, useless in golfed version
 t=''
 for(y=0;y<n;y++)
 {
 for(x=0;x<b;x++)
 {
 k = x / m | 0
 h = x % s
 if (h ==0 )
 c=k*s+y
 else if (h == m)
 c=k*s+m-y
 else if (y == 0 && h>m)
 c=k*s+h
 else if (y == m && h<m)
 c=k*s+m+h
 else
 c=-1
 t+=a[c]||' '
 }
 t+='\n'
 }
 return t
}

Test

F=a=>m=>eval('for(--m,t=y=``;y<=m;++y,t+=`\n`)for(x=0;a[x];)t+=a[2*(x-x%m)+((h=x++%(2*m))?h-m?!y&h>m?h:y<m|h>m?NaN:m+h:m-y:y)]||` `')
function test()
{
 var n=+N.value
 var s=S.value
 O.textContent=F(s)(n)
} 
test()

#S {width:80%}
#N {width:5%}

<input id=N value=5 type=number oninput='test()'>
<input id=S 5 oninput='test()'
value='IHopeYourProgramWorksForInputStringsWhichAre100CharactersLongBecauseThisTestCaseWillFailIfItDoesNot.'>
<pre id=O></pre>

Question 15

Pyth, 122 bytes

=k@Q0J-@Q1 1K*4J=T*@Q1[*lkd;Vlk=Z+*%NJ/%N*J2J*/N*J2J=Y.a-+**/%N*J2J!/%NK*J2J*%NJ!/%N*J2J**!/%N*J2J/%NK*J2J XTYX@TYZ@kN;jbT

I've made a formula to calculate the x, y positions of each character based on the segment size / modulo, but they got larger than I expected :c

Explanation:

=k@Q0 # Initialize var with the text
 J-@Q1 1 # Initialize var with the segment size (minus 1)
 K*4J # Initialize var with the "block" size (where the pattern start to repeat)
 =T*@Q1[*lkd; # Initialize output var with an empty array of strings
 Vlk # Interate over the text
 =Z+*%NJ/%N*J2J*/N*J2J # Matemagics to calculate X position
 =Y.a-+**/%N*J2J!/%NK*J2J*%NJ!/%N*J2J**!/%N*J2J/%NK*J2J # Matemagics to calculate Y position
 XTYX@TYZ@kN; # Assign the letter being iterated at x,y in the output
 jbT # Join with newlines and print the output

Test here

For the Math formulas, I used mod to generate 0/1 flags and then multiplied by a factor based on the input n, added the spreadsheet with each step on the snippet bellow

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<table style="border-collapse:collapse;table-layout:fixed;width:761pt" border="0" cellpadding="0" cellspacing="0" width="1015">
<colgroup><col style="width:16pt" width="21">
<col style="mso-width-alt:2742;width:56pt" span="2" width="75">
<col style="width:23pt" width="31">
<col style="width:50pt" width="67">
<col style="width:60pt" width="80">
<col style="width:85pt" width="113">
<col style="width:26pt" width="35">
<col style="width:41pt" width="54">
<col style="width:29pt" width="39">
<col style="width:41pt" width="55">
<col style="width:104pt" width="138">
<col style="width:29pt" width="39">
<col style="width:41pt" width="54">
<col style="width:65pt" width="87">
<col style="width:39pt" width="52">
</colgroup><tbody><tr style="height:15.0pt" height="20">
<td class="x23" style="height:15.0pt;width:16pt" width="21" height="20">d</td>
<td class="x23" style="width:56pt" width="75">e</td>
<td class="x23" style="width:56pt" width="75">f</td>
<td class="x24" style="width:23pt" width="31">&nbsp;</td>
<td class="x23" style="width:50pt" width="67">h</td>
<td class="x23" style="width:60pt" width="80">i</td>
<td class="x23" style="width:85pt" width="113">j</td>
<td class="x23" style="width:26pt" width="35">k</td>
<td class="x23" style="width:41pt" width="54">l</td>
<td class="x23" style="width:29pt" width="39">m</td>
<td class="x23" style="width:41pt" width="55">n</td>
<td class="x23" style="width:104pt" width="138">o</td>
<td class="x23" style="width:29pt" width="39">p</td>
<td class="x23" style="width:41pt" width="54">q</td>
<td class="x23" style="width:65pt" width="87">r</td>
<td class="x23" style="width:39pt" width="52">s</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x23" style="height:15.0pt" height="20">i</td>
<td class="x23">expected x</td>
<td class="x23">expected y</td>
<td class="x24" style="">&nbsp;</td>
<td class="x23">pos % seg</td>
<td class="x23">pos/(seg*2)</td>
<td class="x23">pos%(seg*2)/seg</td>
<td class="x23">not j</td>
<td class="x23">seg*i+h</td>
<td class="x23">i*seg</td>
<td class="x23">j*l+k*m</td>
<td class="x23">pos%(seg*4)/(seg*2)</td>
<td class="x23">not o</td>
<td class="x23">j*p*seg</td>
<td class="x23">abs(o*seg-h)</td>
<td class="x23">q*j+r*k</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x19" style="height:15.0pt" align="right" height="20">0</td>
<td class="x2" style="" align="right">0</td>
<td class="x2" style="" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x2" style="" align="right">0</td>
<td class="x2" style="" align="right">0</td>
<td class="x2" style="" align="right">0</td>
<td class="x2" style="" align="right">1</td>
<td class="x2" style="" align="right">0</td>
<td class="x20" style="" align="right">0</td>
<td class="x21" style="" align="right">0</td>
<td class="x2" style="" align="right">0</td>
<td class="x2" style="" align="right">1</td>
<td class="x2" style="" align="right">0</td>
<td class="x20" style="" align="right">0</td>
<td class="x22" style="" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x18" style="">&nbsp;</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">0</td>
<td class="x6" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">1</td>
<td class="x7" align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">2</td>
<td class="x18" style="">&nbsp;</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">2</td>
<td class="x5" align="right">0</td>
<td class="x6" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">2</td>
<td class="x7" align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">3</td>
<td class="x9" align="right">0</td>
<td class="x9" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x6" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">0</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">4</td>
<td class="x9" align="right">1</td>
<td class="x9" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x6" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">5</td>
<td class="x9" align="right">2</td>
<td class="x9" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">2</td>
<td class="x4" align="right">0</td>
<td class="x6" align="right">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">2</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">6</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">3</td>
<td class="x5" align="right">3</td>
<td class="x6" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">3</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">7</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">2</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">4</td>
<td class="x5" align="right">3</td>
<td class="x6" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">2</td>
<td class="x7" align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">8</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">2</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">5</td>
<td class="x5" align="right">3</td>
<td class="x6" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">1</td>
<td class="x7" align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">9</td>
<td class="x9" align="right">3</td>
<td class="x9" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">3</td>
<td class="x6" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x4" align="right">3</td>
<td class="x7" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">10</td>
<td class="x9" align="right">4</td>
<td class="x9" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">4</td>
<td class="x4" align="right">3</td>
<td class="x6" align="right">4</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x4" align="right">2</td>
<td class="x7" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">11</td>
<td class="x9" align="right">5</td>
<td class="x9" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">2</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">5</td>
<td class="x4" align="right">3</td>
<td class="x6" align="right">5</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x7" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">12</td>
<td class="x4" align="right">6</td>
<td class="x4" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">6</td>
<td class="x5" align="right">6</td>
<td class="x6" align="right">6</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x7" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">13</td>
<td class="x4" align="right">6</td>
<td class="x4" align="right">1</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">7</td>
<td class="x5" align="right">6</td>
<td class="x6" align="right">6</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">1</td>
<td class="x7" align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">14</td>
<td class="x4" align="right">6</td>
<td class="x4" align="right">2</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">2</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">8</td>
<td class="x5" align="right">6</td>
<td class="x6" align="right">6</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">2</td>
<td class="x7" align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">15</td>
<td class="x9" align="right">6</td>
<td class="x9" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">6</td>
<td class="x4" align="right">6</td>
<td class="x6" align="right">6</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">0</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">16</td>
<td class="x9" align="right">7</td>
<td class="x9" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">7</td>
<td class="x4" align="right">6</td>
<td class="x6" align="right">7</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">17</td>
<td class="x9" align="right">8</td>
<td class="x9" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">2</td>
<td class="x4" align="right">2</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">8</td>
<td class="x4" align="right">6</td>
<td class="x6" align="right">8</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x5" align="right">3</td>
<td class="x4" align="right">2</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">18</td>
<td class="x4" align="right">9</td>
<td class="x4" align="right">3</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">9</td>
<td class="x5" align="right">9</td>
<td class="x6" align="right">9</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">3</td>
<td class="x7" align="right">3</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">19</td>
<td class="x4" align="right">9</td>
<td class="x4" align="right">2</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">10</td>
<td class="x5" align="right">9</td>
<td class="x6" align="right">9</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">2</td>
<td class="x7" align="right">2</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x3" style="height:15.0pt;border-top:none" align="right" height="20">20</td>
<td class="x4" align="right">9</td>
<td class="x4" align="right">1</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">2</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">11</td>
<td class="x5" align="right">9</td>
<td class="x6" align="right">9</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">1</td>
<td class="x7" align="right">1</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">21</td>
<td class="x9" align="right">9</td>
<td class="x9" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">0</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">9</td>
<td class="x4" align="right">9</td>
<td class="x6" align="right">9</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x4" align="right">3</td>
<td class="x7" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x8" style="height:15.0pt;border-top:none" align="right" height="20">22</td>
<td class="x9" align="right">10</td>
<td class="x9" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x10">1</td>
<td class="x4" align="right">3</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">10</td>
<td class="x4" align="right">9</td>
<td class="x6" align="right">10</td>
<td class="x4" align="right">1</td>
<td class="x4" align="right">0</td>
<td class="x5" align="right">0</td>
<td class="x4" align="right">2</td>
<td class="x7" align="right">0</td>
</tr>
<tr style="height:15.0pt" height="20">
<td class="x11" style="height:15.0pt;border-top:none" align="right" height="20">23</td>
<td class="x12" align="right">11</td>
<td class="x12" align="right">0</td>
<td class="x18" style="">&nbsp;</td>
<td class="x13">2</td>
<td class="x14" align="right">3</td>
<td class="x14" align="right">1</td>
<td class="x14" align="right">0</td>
<td class="x15" align="right">11</td>
<td class="x14" align="right">9</td>
<td class="x16" align="right">11</td>
<td class="x14" align="right">1</td>
<td class="x14" align="right">0</td>
<td class="x15" align="right">0</td>
<td class="x14" align="right">1</td>
<td class="x17" align="right">0</td>
</tr>
</tr>
</tbody></table>

Question 16

Can you explain the Matemagics ? i.e write them in a more human-fashion way ?

Question 17

@FliiFe done c:

Question 18

PHP, (削除) 127 (削除ここまで) (削除) 126 (削除ここまで) (削除) 124 (削除ここまで) (削除) 120 (削除ここまで) (削除) 119 (削除ここまで) (削除) 118 (削除ここまで) (削除) 117 (削除ここまで) (削除) 110 (削除ここまで) 106 bytes

Uses ISO-8859-1 encoding.

for(;($q=&$o[$y+=$d]||$q=~ÿ)&&~Ï^$q[$x+=!$d]=$argv[1][$a];$a++%($argv[2]-1)?:$d-=-!$y?:1)?><?=join(~õ,$o);

Run like this (-d added for aesthetics only):

php -r 'for(;($q=&$o[$y+=$d]||$q=~ÿ)&&~Ï^$q[$x+=!$d]=$argv[1][$a];$a++%($argv[2]-1)?:$d-=-!$y?:1)?><?=join(~õ,$o);' "Hello W0rld!" 3 2>/dev/null;echo

Ungolfed:

// Iterate over ...
for (
 ;
 // ... the characters of the input string. Prepend `0` so a 0 in the input
 // becomes truthy.
 0 . $char = $argv[1][$a];
 // Use modulo to determine the end of a stretch (where direction is
 // changed).
 // Change direction (`0` is right, `-1` is up and `1` is down). When
 // y coordinate is `0`, increment the direction, else decrement.
 $a++ % ($argv[2] - 1) ?: $direction += $y ? -1 : 1
)
 (
 // Increase or decrease y coordinate for direction -1 or 1 respectively.
 // Check whether the array index at new y coordinate is already set.
 $reference =& $output[$y += $direction] ||
 // If not, create it as a string (otherwise would be array of chars).
 // Null byte, won't be printed to prevent leading char.
 $reference = ~ÿ;
 // Increment x coordinate for direction 0. Set the output char at the
 // current coordinates to the char of the current iteration.
 ) & $reference[$x += !$direction] = $char;
// Output all lines, separated by a newline.
echo join(~õ, $output);

Tweaks

Saved a byte by using < instead of !=
Saved 2 bytes by setting the string to 0 at first, so I don't have to prepend another 0 (in case the first output in a line was a 0), yielding truthy 00.
Saved 4 bytes by using a reference instead of repeating $o[$y]
Saved a byte by using modulo instead of == for comparing direction with 1 to change x coordinate
Saved a byte by removing type cast null to int for string offset, as string offset is cast to int anyway
Saved a byte by using short print tag
Saved 7 bytes by improving the direction logic
Saved 4 bytes by directly assigning the char to prevent intermediate $c

score 13 · Accepted Answer · 2016-04-05 15:32:04Z

Ruby, 87 bytes

->s,n{p=0
a=(' '*(w=s.size)+$/)*n
w.times{|i|a[p]=s[i];p+=[w+1,1,-w-1,1][i/(n-1)%4]}
a}

Some minor abuse of the rule Trailing spaces on each line are allowed. Each line of output is w characters long, plus a newline, where w is the length of the original string, i.e. long enough to hold the whole input. Hence there is quite a lot of unnecessary whitespace to the right for large n.

Ungolfed in test program

f=->s,n{
 p=0 #pointer to where the next character must be plotted to
 a=(' '*(w=s.size)+$/)*n #w=length of input. make a string of n lines of w spaces, newline terminated
 w.times{|i| #for each character in the input (index i)
 a[p]=s[i] #copy the character to the position of the pointer
 p+=[w+1,1,-w-1,1][i/(n-1)%4] #move down,right,up,right and repeat. change direction every n-1 characters
 }
a} #return a
puts $/,f['a',3]
puts $/,f['Hello,World!',3]
puts $/,f['ProgrammingPuzzlesAndCodeGolf',4]
puts $/,f['IHopeYourProgramWorksForInputStringsWhichAre100CharactersLongBecauseThisTestCaseWillFailIfItDoesNot.',5]
puts $/,f['!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~',10]

Stack Exchange Network

Snakify a String

Your Task

Specifications

Test Cases

9 Answers 9

Ruby, 87 bytes

Pyth, (削除) 48 (削除ここまで) (削除) 45 (削除ここまで) (削除) 44 (削除ここまで) (削除) 43 (削除ここまで) 42 bytes

JavaScript (ES6), 143 bytes

Pyth, (削除) 85 (削除ここまで) (削除) 74 (削除ここまで) 59 bytes

Explanation

The first section

The second section

The third section

BONUS

JavaScript (ES6), 122 bytes

C, 138 bytes

JavaScript (ES6), 131

Pyth, 122 bytes

PHP, (削除) 127 (削除ここまで) (削除) 126 (削除ここまで) (削除) 124 (削除ここまで) (削除) 120 (削除ここまで) (削除) 119 (削除ここまで) (削除) 118 (削除ここまで) (削除) 117 (削除ここまで) (削除) 110 (削除ここまで) 106 bytes

Tweaks

Your Answer

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Hot Network Questions

Snakify a String

Your Task

Specifications

Test Cases

9 Answers 9

Ruby, 87 bytes

Pyth, (削除) 48 (削除ここまで) (削除) 45 (削除ここまで) (削除) 44 (削除ここまで) (削除) 43 (削除ここまで) 42 bytes

JavaScript (ES6), 143 bytes

Pyth, (削除) 85 (削除ここまで) (削除) 74 (削除ここまで) 59 bytes

Explanation

The first section

The second section

The third section

BONUS

JavaScript (ES6), 122 bytes

C, 138 bytes

JavaScript (ES6), 131

Pyth, 122 bytes

PHP, (削除) 127 (削除ここまで) (削除) 126 (削除ここまで) (削除) 124 (削除ここまで) (削除) 120 (削除ここまで) (削除) 119 (削除ここまで) (削除) 118 (削除ここまで) (削除) 117 (削除ここまで) (削除) 110 (削除ここまで) 106 bytes

Tweaks

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