This is my pillow

Question

...will you help me immortalize it?

I've had this pillow a few years now, and apparently it's time to get rid of it. Can you please write a function or program, that I can bring with me and use to recreate this pillow whenever I want to reminisce a bit.

It must work with no input arguments.

The output should look exactly like this (trailing newlines and spaces are OK).

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////

This is code golf, so the shortest code in bytes win!

---

Leaderboard

var QUESTION_ID=98701,OVERRIDE_USER=31516;function answersUrl(e){return"https://api.stackexchange.com/2.2/questions/"+QUESTION_ID+"/answers?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+ANSWER_FILTER}function commentUrl(e,s){return"https://api.stackexchange.com/2.2/answers/"+s.join(";")+"/comments?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+COMMENT_FILTER}function getAnswers(){jQuery.ajax({url:answersUrl(answer_page++),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){answers.push.apply(answers,e.items),answers_hash=[],answer_ids=[],e.items.forEach(function(e){e.comments=[];var s=+e.share_link.match(/\d+/);answer_ids.push(s),answers_hash[s]=e}),e.has_more||(more_answers=!1),comment_page=1,getComments()}})}function getComments(){jQuery.ajax({url:commentUrl(comment_page++,answer_ids),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){e.items.forEach(function(e){e.owner.user_id===OVERRIDE_USER&&answers_hash[e.post_id].comments.push(e)}),e.has_more?getComments():more_answers?getAnswers():process()}})}function getAuthorName(e){return e.owner.display_name}function process(){var e=[];answers.forEach(function(s){var r=s.body;s.comments.forEach(function(e){OVERRIDE_REG.test(e.body)&&(r="<h1>"+e.body.replace(OVERRIDE_REG,"")+"</h1>")});var a=r.match(SCORE_REG);a&&e.push({user:getAuthorName(s),size:+a[2],language:a[1],link:s.share_link})}),e.sort(function(e,s){var r=e.size,a=s.size;return r-a});var s={},r=1,a=null,n=1;e.forEach(function(e){e.size!=a&&(n=r),a=e.size,++r;var t=jQuery("#answer-template").html();t=t.replace("{{PLACE}}",n+".").replace("{{NAME}}",e.user).replace("{{LANGUAGE}}",e.language).replace("{{SIZE}}",e.size).replace("{{LINK}}",e.link),t=jQuery(t),jQuery("#answers").append(t);var o=e.language;/<a/.test(o)&&(o=jQuery(o).text()),s[o]=s[o]||{lang:e.language,user:e.user,size:e.size,link:e.link}});var t=[];for(var o in s)s.hasOwnProperty(o)&&t.push(s[o]);t.sort(function(e,s){return e.lang>s.lang?1:e.lang<s.lang?-1:0});for(var c=0;c<t.length;++c){var i=jQuery("#language-template").html(),o=t[c];i=i.replace("{{LANGUAGE}}",o.lang).replace("{{NAME}}",o.user).replace("{{SIZE}}",o.size).replace("{{LINK}}",o.link),i=jQuery(i),jQuery("#languages").append(i)}}var ANSWER_FILTER="!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe",COMMENT_FILTER="!)Q2B_A2kjfAiU78X(md6BoYk",answers=[],answers_hash,answer_ids,answer_page=1,more_answers=!0,comment_page;getAnswers();var SCORE_REG=/<h\d>\s*([^\n,]*[^\s,]),.*?(\d+)(?=[^\n\d<>]*(?:<(?:s>[^\n<>]*<\/s>|[^\n<>]+>)[^\n\d<>]*)*<\/h\d>)/,OVERRIDE_REG=/^Override\s*header:\s*/i;

body{text-align:left!important}#answer-list,#language-list{padding:10px;width:290px;float:left}table thead{font-weight:700}table td{padding:5px}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link rel="stylesheet" type="text/css" href="//cdn.sstatic.net/codegolf/all.css?v=83c949450c8b"> <div id="answer-list"> <h2>Leaderboard</h2> <table class="answer-list"> <thead> <tr><td></td><td>Author</td><td>Language</td><td>Size</td></tr></thead> <tbody id="answers"> </tbody> </table> </div><div id="language-list"> <h2>Winners by Language</h2> <table class="language-list"> <thead> <tr><td>Language</td><td>User</td><td>Score</td></tr></thead> <tbody id="languages"> </tbody> </table> </div><table style="display: none"> <tbody id="answer-template"> <tr><td>{{PLACE}}</td><td>{{NAME}}</td><td>{{LANGUAGE}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table> <table style="display: none"> <tbody id="language-template"> <tr><td>{{LANGUAGE}}</td><td>{{NAME}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table>

Answer 1

///, 116 bytes

/a/\\\\\\\\\\\\\\\///b/\\\\\\\\\\\\\\\\//A/aaaaa//B/bbbbb//C/ABABABABABAB
//D/BABABABABABA
/CCCCDDDDCCCCDDDDCCCCDDDD

Try it online!

Edit: the \\\\\\\\\\\\\\\/ and \\\\\\\\\\\\\\\\ are actually a single / and \, respectively.

Edit: -3 because I thought of removing i. I think this can't be further golfed.

Answer 2

05AB1E, 18 15 bytes

Code:

„/\5×{4Å6×»6F=R

Explanation:

„/\               # Push the string "/\"
   5×             # Repeat 5 times: "/\/\/\/\/\"
     {            # Sort, resulting in: "/////\\\\\"
      4Å6         # Create a list of 6's with length 4: [6, 6, 6, 6]
         ×        # Vectorized string multiplication
          »       # Join by newlines
           6F     # Do the following six times..
             =    #   Print with a newline without popping
              R   #   Reverse the string

Uses the CP-1252 encoding. Try it online!

Answer 3

Python 2, 49 bytes

b,a='\/';exec("print(a*5+b*5)*6;"*4+"a,b=b,a;")*6

Thanks to Mitch Schwartz for this clean method that saves a byte. The idea is to print four lines of ('\\'*5+'/'*5)*6, swap the roles of slash and backslash, and then do that whole process 6 times. The two characters are stored in a and b, and swapped as a,b=b,a. The double-loop is double by generating the following code string, then executing it with exec:

print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;print(a*5+b*5)*6;a,b=b,a;

---

50 bytes:

s='/'*5+'\\'*5;exec("print s*6;"*4+"s=s[::-1];")*6

Makes the line string, prints it four times and then reverses it, then does that 6 times. Does so by generating the following code, then executing it:

print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1];print s*6;print s*6;print s*6;print s*6;s=s[::-1]

Here are some of the iterations of my golfing:

for c in([1]*4+[-1]*4)*3:print('/'*5+'\\'*5)[::c]*6

for i in range(24):print('/\\'*5+'\/'*5)[i/4%2::2]*6

for c in range(24):print('\\'*5+'/'*5)[::(c&4)/2-1]*6

for i in range(24):print('/'*5+'\\'*5)[::1-i/4%2*2]*6

for c in([1]*4+[0]*4)*3:print('\/'*5+'/\\'*5)[c::2]*6

for c in([1]*4+[0]*4)*3:print('\/'[c]*5+'/\\'[c]*5)*6

for c in(['/\\']*4+['\/']*4)*3:print(c[0]*5+c[1]*5)*6

for c in([5]*4+[-5]*4)*3:print('/'*c+'\\'*5+'/'*-c)*6

print((('/'*5+'\\'*5)*6+'\n')*4+(('\\'*5+'/'*5)*6+'\n')*4)*3

for x in(['/'*5+'\\'*5]*4+['\\'*5+'/'*5]*4)*3:print x*6

a='/'*5;b='\\'*5
for x in([a+b]*4+[b+a]*4)*3:print x*6

s='/'*5+'\\'*5
for x in([s]*4+[s[::-1]]*4)*3:print x*6

s=('/'*5+'\\'*5)*9
exec("print s[:60];"*4+"s=s[5:];")*6

a='/'*5;b='\\'*5
for i in range(24):print[a+b,b+a][i/4%2]*6

Answer 4

05AB1E, 15 bytes

„/\5×{R6×6FR4F=

Try it online!

Explanation:

„/\             # Push "/\"
   5×           # Repeat string five times: "/\/\/\/\/\"
     {          # Sort: "/////\\\\\"
      R         # Reverse: "\\\\\/////
       6×       # Repeat string six times
         6F     # Repeat the following six times:
           R    #   Reverse
            4F  #   Repeat the following four times:
              = #     Print without popping

Uses the CP-1252 encoding.

Answer 5

Bubblegum, 30 bytes

00000000: d307 8118 1020 9dc5 3544 3523 f8a4 b386  ..... ..5D5#....
00000010: aae6 e113 cfa3 f13c 1acf a3f1 0c00       .......<......

Obligatory Bubblegum answer.

Answer 6

JavaScript (ES6), 68 60 58 bytes

A recursive function. Several optimizations inspired from chocochaos answer.

f=(n=1440)=>n--?'/\\'[n/240&1^n/5&1]+(n%60?'':`
`)+f(n):''

Demo

f=(n=1440)=>n--?'/\\'[n/240&1^n/5&1]+(n%60?'':`
`)+f(n):''

console.log(f());

Answer 7

Haskell, 77 70 57 bytes

a%b=(<*[1..a]).([1..b]>>)
unlines$4%3$5%6<$>["/\\","\\/"]

Boring concats and replicates instead of playing with sines. Old was:

unlines[["\\/"!!(ceiling$sin(pi*x/5)*sin(pi*y/4))|x<-[0.5..59]]|y<-[0.5..23]]

Answer 8

Brainfuck, 140 bytes

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

:-D

Answer 9

Brainfuck, 149 bytes

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

The best interpreter EVAR!

This uses 6 cells (no wrapping, no modulo). Here they are:

0A 00 2F 00 5C 00

The 00 cells are used for the loop counters. Here, the counters are filled in with initial values:

0A 06 2F 04 5C 03

The leftmost counter is for the innermost loop (yes, I use nested loops of depth 3). Please note that the 4th cell (04 counter) is used twice, once for /////\\\\\..., and once for \\\\\/////... every time.

0A, 2F and 5C are the characters \n, / and \, respectively.

Answer 10

Canvas, 10 9 bytes

/５４＊╬６×３＊

Try it here!

Explanation:

/          push "/"
 54*       extend horizontally 5 times and vertically 4 times
    ╬      quad-palindromize with 0 overlap
     6×    repeat horizontally 6 times
       3*  and again vertically, 3 times

Answer 11

Pyke, 16 bytes

"/\"6*5m*n+4*sD3

After update today that allowed " in string literals, 17 bytes

"/\\"6*5m*n+4*sD3

Try it here!

Answer 12

Python 2, 86 80 76 74 73 bytes

for z in range(24):a=('/'*5+'\\'*5)*24;print((a+a[::-1])*3)[z*60:z*60+60]

Could probably golf a few more off it but it's a start.

Edit

Saved 6 by removing some unneeded brackets

Another 4 by using a single string and then reversing it

Thanks @Adnan. Had a late night last night and still not fully awake yet :p

-1 by moving the *24 to the variable instead of using it twice

Answer 13

Python 2.7 66 -> 56 -> 55 bytes

a="/"*5+"\\"*5;b=a[::-1];c=6*a+"\n";d=6*b+"\n";e=4*c+4*d;print e*3

new to code golfing

a="/"*5+"\\"*5;print(4*(6*a+"\n")+4*(6*a[::-1]+"\n"))*3

Thanks Stewie Griffin

Forgot a silly whitespace ;)

Answer 14

Brainfuck, 179 bytes

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

I know this isn't the best score in the thread but I wanted to try out brainfuck and give this a try.

Edit: I must've made an error while copypasting. This version should work

Answer 15

Dyalog APL, 24 bytes

(60⍴5/0 4)⊖60/⍪∊3⍴⊂4/'/\'

Answer 16

Ruby, 46 bytes

Creates the following string (70 characters, one set more than needed) then alternates between sampling characters 0..59 and 5..64from it.

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\

code and output

24.times{|i|puts ((?/*5+?\\*5)*7)[i/4%2*5,60]}

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////

interesting mistake (a 7 instead of a 5)

24.times{|i|puts ((?/*5+?\\*5)*7)[i/4%2*7,60]}

/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\
\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\

Answer 17

C, 66 61 bytes

5 bytes saved thanks to orlp.

Straightforward character by character printing. 61 characters per row, last is newline (ASCII 10) and the others alternate between /47 and \ 92.

i;f(){for(i=1463;i;)putchar(i--%61?i%61/5+i/244&1?92:47:10);‌​}

//call like this
main(){f();}

Answer 18

MATL, 18 16 bytes

'\/'6:&+thK5&Y")

Try it online!

Explanation

'\/'   % Push this string
6:     % Push array [1 2 3 4 5 6]
&+     % 6×6 matrix with all pair-wise additions from that array
th     % Concatenate horizontally with itself. Gives a 6×12 matrix
K      % Push 4
5      % Push 5
&Y"    % Repeat each entry of the matrix 4 times vertically and 5 times horizontally
       % This gives a 24×60 matrix
)      % Index (modularly) into the string. This produces the desired 24×60 char array

Answer 19

Pyth, 22 bytes

V6V4V12p*5?%+bN2\\\/)k

Try it here.

Explanation:

V6                     Loop 6 times, with N from 0 to 5:
  V4                   Loop 4 times, with H from 0 to 3:
    V12                Loop 12 times, with b from 0 to 11:
      p                Print without newline
        *              The repetition
          5            5 times of
          ?            if
            %          the remainder
              + b N    when the sum of b and N
              2        is divided by 2
          \\           then the "\" character
          \/           else the "/" character
    )                  End
                       (implicitly print with newline)
  k                    k (empty string)
                       (implicit end)
                       (implicit end)

Sorry if the explanation is a little hard to understand, but it was kinda complicated.

Answer 20

V, 22 21 bytes

Edit One byte won, thanks @DjMcMayhem:

5á\5á/05ä$4Ä5x$p4Ä3ä}

Changes are:

• Y4P -> 4Ä Use V duplicate line instead of Vim built-in command (this will add a blank line at the end of the paragraph)
• 3äG -> 3ä} Duplicate the paragraph instead of the whole buffer (to avoid blank line generated by previous change)

---

Original post

5á\5á/05ä$Y4P5x$p4Ä3äG

Try it online

Decomposed like this:

5á\                    Write 5 \
   5á/                 Write 5 / after
      0                Go to the beginning of the line
       5ä$             Copy the text to the end of the line and repeat it 5 times
          Y4P          Copy the line and create 4 new copies
             5x$p      Delete the 5 first characters and put them at the end of the line
                 4Ä    Duplicate this line
                   3äG Duplicate the whole text

Answer 21

Jelly, 17 16 bytes

⁾/\ẋ6Wẋ4;U$ẋ3x5Y

Try it online!

Thanks to 6710 (miles) for -1 byte.

Answer 22

Actually, 21 bytes

"/\"5*SR6*;4α@R4α+3αi

Try it online!

-1 byte from Adnan

Explanation:

"/\"5*SR6*;4α@R4α+3αi
"/\"5*                 "/\" repeated 5 times
      SR               sort and reverse (result: "\\\\\/////")
        6*             repeat string 6 times (forms one row)
          ;4α          copy and push a list containing 4 copies
             @R4α+     push a list containing 4 copies of the reversed string, append to previous list (now we have one row of diamonds)
                  3α   repeat pattern vertically 2 more times
                    i  flatten and implicitly print

Answer 23

J, 31 28 19 bytes

4#_60]`|.\5#72$'/\'

Usage

   4#_60]`|.\5#72$'/\'
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////
\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////\\\\\/////

Answer 24

APL, 30 bytes

A←240⍴'/////\\\\\'⋄24 60⍴A,⊖A

I'm quite new to APL, (I'm using APLX, but this should work across most implementations of APL), so this is a quite simplistic solution.

Explanation:

A ← 240 ⍴ '/////\\\\\' ⍝ set A to be a 240 character vector populated with '/////\\\\\'
⋄                      ⍝ statement separator
24 60 ⍴ A,⊖A           ⍝ populate a 24 by 60 character matrix with the concatenation 
                          of A and the reverse of A (⊖A)

Answer 25

Python 2, 63 bytes

a='\n'.join([('/'*5+'\\'*5)*6]*4);print'\n'.join([a,a[::-1]]*3)

For Python 3, do this (65 bytes):

a='\n'.join([('/'*5+'\\'*5)*6]*4);print('\n'.join([a,a[::-1]]*3))

Answer 26

Self-modifying Brainfuck, 91 bytes

>>+++[<++++[<++++++[<.....<.....>>-]<<<.>>>>-]++++[<++++++[<<.....>.....>-]<<<.>>>>-]>-]
\/

Try it online!

Same as my brainfuck answer, but uses the 3 last characters of the source code instead of generating them at runtime.

Answer 27

Octave, 50 48 bytes

Anonymous function:

@()repmat([A=repmat(47,4,5) B=A*2-2;B A ''],3,6)

You can try online here. Simply run the above command and then run the function with ans().

Essentially this creates an array of the value 47 which is 4 high and 5 wide. It then creates a second array of value 92 which is the same size.

The two arrays are concatenated into a checkerboard of [A B;B A]. The '' is concatenated as well to force conversion to character strings.

Finally the whole array is replicated 3 times down and 6 times across to form the final size.

---

• Saved 2 bytes, thanks @StewieGriffin

Answer 28

PHP, 73 69 bytes

for($s='/\\';$i<1440;$i++)echo$i%60<1?'
':'',$s[($i/5+($i/240|0))%2];

Demo

http://ideone.com/z7N1Md

Answer 29

APL, 16

4⌿5/1↓⍉12 7⍴'\/'

Try it on tryapl.org

Answer 30

Java 7, 120 bytes

String c(){String r="";for(int i=0;i<1440;r+=(i%60<1?"\n":"")+(i/60%8<4?i%10<5?"/":"\\":i%10<5?"\\":"/"),i++);return r;}

Pushed everything into one loop. Beats Brainfuck, mission accomplished.

See it online: https://ideone.com/pZjma3