An Invitation to TRICK: How to write weird Ruby programs Yusuke Endoh @ STORES, Inc.

This talk

What?

code.rb $ ruby code.rb No, you have to copy the whole text, from "You don't know" to the end" ';BEGIN{eval$q=%q(def don(e)=e;def You(g)=at_exit{puts"You don'#{g}';BEGIN{eval$q=%q(#$q)};$s=%!#$s!"})};$s=%! puts %(Nb, lbh unir gb pbcl gur jubyr grkg, sebz "Ybh qba'g xabj" gb gur raq").tr("a-z","n-za-m")

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The abstract You don't know truly weird Ruby yet, do you? TRICK is an irregularly held Ruby programming contest that celebrates the most creative and weird Ruby programs. Among the many submissions, about a dozen particularly exceptional entries are awarded. Curious about what kind of programs win? It is a code like this, this whole text itself. ';BEGIN{eval$q=%q(def don(e)=e;def You(g)=at_exit{puts"You don'#{g}';BEGIN{eval$q=%q(#$q)};$s=%!#$s!"})};$s=%! puts %(Nb, lbh unir gb pbcl gur jubyr grkg, sebz "Ybh qba'g xabj" gb gur raq").tr("a-z","n- za-m") In this talk, we will showcase the winning entries from past TRICK contest and our own weird Ruby code. We will explore various techniques for writing such programs. By the end of this talk, you'll be ready to submit your original Ruby creations to TRICK 2025! This is the abstract for this talk, and IS a Ruby code that prints the code itself

Introduction and this talk • Yusuke Endoh (mame, @mametter) – A full-time Ruby committer at STORES, Inc. • Ruby's keyword arguments • Single-line def (as April Fool joke) • TypeProf – A weird Ruby programmer • This talk will – Introduce some weird Ruby programs – Briefly explain the tips to write weird Ruby programs

cfp-quine.rb You don't know truly weird Ruby yet, do you? TRICK is an irregularly held Ruby programming contest that celebrates the most creative and weird Ruby programs. Among the many submissions, about a dozen particularly exceptional entries are awarded. Curious about what kind of programs win? It is a code like this, this whole text itself. ';BEGIN{eval$q=%q(def don(e)=e;def You(g)= at_exit{puts"You don'#{g}';BEGIN{eval$q=%q(#$q)};$s=%!#$s!"})};$s=%! puts %(Nb, lbh unir gb pbcl gur jubyr grkg, sebz "Ybh qba'g xabj" gb gur raq").tr("a-z","n- za-m") In this talk, we will showcase the winning entries from past TRICK contest and our own weird Ruby code. We will explore various techniques for writing such programs. By the end of this talk, you'll be ready to submit your original Ruby creations to TRICK 2025!

cfp-quine.rb You don't know truly weird Ruby yet, do you? x x TRICK is an irregularly held Ruby programming contest that celebrates the most creative and weird Ruby programs. Among the many submissions, about a dozen particularly exceptional x entries are awarded. x x Curious about what kind of programs win? It is a code like this, this whole text itself. x x ';BEGIN{eval$q=%q(def don(e)=e;def You(g)= at_exit{puts"You don'#{g}';BEGIN{eval$q=%q(#$q)};$s=%!#$s!"})};$s=%! x puts %(Nb, lbh unir gb pbcl gur jubyr grkg, sebz "Ybh qba'g xabj" gb gur raq").tr("a-z","n- za-m") x x In this talk, we will showcase the winning entries from past TRICK contest and our own x weird Ruby code. x We will explore various techniques for writing such programs. x By the end of this talk, you'll be ready to submit your original Ruby creations to TRICK x 2025! A String literal Method calls to "don" and "You": You(don("…")) Quine: printing self

Tip: Quine (self-reproducing program) • This program outputs the program itself s=%q( puts "s=%q(#{ s }); eval(s)" ); eval(s) $ ruby quine.rb s=%q( puts "s=%q(#{ s }); eval(s)" ); eval(s)

TRICK: A contest for weird Ruby programs mametter eto shinh yhara matz sunleonid flagitious TRICK 2022 Judges Transcendental Ruby Imbroglio Contest for RubyKaigi

TRICK: A contest for weird Ruby programs • Four TRICKs held in the past – TRICK 2013 – TRICK 2015 – TRICK 2018 (FINAL) – TRICK 2022 (Returns) • Today, I will pick up only four or five winning entries – All winning entries are published in: No k! http://github.com/tric /

TRICK 2022: "Most global" award by mame (me!) a=0132;eval$s=%q!eval(%q~d,h,Y ___---------___ ,X=*$*.map(&:to_i),45;b=(a+d)% R=360;s=[v=[include(Math)]] _--- ---_ ;T=PI*2;n=x=0;f=->{(n/=2)%2 >0?1:f[]*2+(n/=2)%2};g=- _- v@v ,,,,,, -_ >{z=f[];z/2*(3-z%2*6)};" 8'8f'y;I;asr1mY?Sr$6r _- ,vv@@@@@@@^''@v,-_ {+Gi{03G3=ZbpUo3l'}Yw CqxJfHIWd'R /v ,@@@@@@@@@@@v ^^^'''^@@@@\ MUS4&$r3D>GqL((/C ea&e'|PS@3aQ@-hL /@@ ,v@@@@@@@@@@@@@@v, '*v, '^@\ ja+/Lru>]96]d_4W 9o][*A;J&..;a?@ /@@@ @@@@@@@@@@@@@@@@@@@v,,,@@@@@ @@\ O'x.RmTPRK+Pol# U;o_wP`}6.g#?y |@@@@v, '@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| 0`.lHNxLXjI^#S 5F-XcldGh_BZDc |@@@@@^ '^^@@@@@@@@@@@@@@@@@'@@@@ '@@@@| JTLKD)#e*CUo$. {c&a46;+AaGW*M |@@@@' '^@@@@@@@@@@@@@ @@@@@v '@@| R5".bytes{n=n* 90+-_1%91};190 |@@^ @@@@@@@@@@@@@ ^^^''' '@| .times{x+=e=(g []+g[].i)*T/R; |^' @@@@@@@@@@@@@vv, @| e==0?s<<<(1..(d==0 ?h*w=h*4:25*w= | ,@@@@@@@@@@@^' | 80)).map{|i|q= i/w*6+3;r=i%w;" \ v@@@@@@@@@@@ / \s'*^,:v@\nXa=# {"%04o"%b};eval$ \ @@@@@@@@@@@@ / s=%q\x21#$s\x21" [r>0?X&&r==(X+168 \ @@@@@@@@^' ,v* / )%R*w/R&&q/6==(90 -Y)*h/180?9:(0..2) \ ^^^^^^' ,^ / .all?{e=d==0?cos(q* T/w/3):(r*3i-120i-q+ \ / 73)/Complex.polar(72 ,2/4.9);q-=2;y,x=e.re -_, _- ct;e.abs<1&&n+=n-s.ma p{|s|z=sqrt(1-y*y);c=d== -_v,, _- 0?r*T/(1-w):b*T/R+acos(x );g=0;s.sum{(g-g=atan2(sin( --__v, __-- o=_1+c),z/tan(_2)+y*cos(o)) /T).round}}.min/9}?n%8:i+9:8]} ```---------``` *""~.gsub(/\x20.*\x20|\n/){})!

TRICK 2022: mame.rb • It prints itself with a globe rotated 45 degrees – Eight execution will return the original code a=0132;eval$s=%q!eval(%q~d,h,Y ___---------___ ,X=*$*.map(&:to_i),45;b=(a+d)% R=360;s=[v=[include(Math)]] _--- ---_ ;T=PI*2;n=x=0;f=->{(n/=2)%2 >0?1:f[]*2+(n/=2)%2};g=- _- v@v ,,,,,, -_ >{z=f[];z/2*(3-z%2*6)};" 8'8f'y;I;asr1mY?Sr$6r _- ,vv@@@@@@@^''@v,-_ {+Gi{03G3=ZbpUo3l'}Yw CqxJfHIWd'R /v ,@@@@@@@@@@@v ^^^'''^@@@@\ MUS4&$r3D>GqL((/C ea&e'|PS@3aQ@-hL /@@ ,v@@@@@@@@@@@@@@v, '*v, '^@\ ja+/Lru>]96]d_4W 9o][*A;J&..;a?@ /@@@ @@@@@@@@@@@@@@@@@@@v,,,@@@@@ @@\ O'x.RmTPRK+Pol# U;o_wP`}6.g#?y |@@@@v, '@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| 0`.lHNxLXjI^#S 5F-XcldGh_BZDc |@@@@@^ '^^@@@@@@@@@@@@@@@@@'@@@@ '@@@@| JTLKD)#e*CUo$. {c&a46;+AaGW*M |@@@@' '^@@@@@@@@@@@@@ @@@@@v '@@| R5".bytes{n=n* 90+-_1%91};190 |@@^ @@@@@@@@@@@@@ ^^^''' '@| .times{x+=e=(g []+g[].i)*T/R; |^' @@@@@@@@@@@@@vv, @| e==0?s<<<(1..(d==0 ?h*w=h*4:25*w= | ,@@@@@@@@@@@^' | 80)).map{|i|q= i/w*6+3;r=i%w;" \ v@@@@@@@@@@@ / \s'*^,:v@\nXa=# {"%04o"%b};eval$ \ @@@@@@@@@@@@ / s=%q\x21#$s\x21" [r>0?X&&r==(X+168 \ @@@@@@@@^' ,v* / )%R*w/R&&q/6==(90 -Y)*h/180?9:(0..2) \ ^^^^^^' ,^ / .all?{e=d==0?cos(q* T/w/3):(r*3i-120i-q+ \ / 73)/Complex.polar(72 ,2/4.9);q-=2;y,x=e.re -_, _- ct;e.abs<1&&n+=n-s.ma p{|s|z=sqrt(1-y*y);c=d== -_v,, _- 0?r*T/(1-w):b*T/R+acos(x );g=0;s.sum{(g-g=atan2(sin( --__v, __-- o=_1+c),z/tan(_2)+y*cos(o)) /T).round}}.min/9}?n%8:i+9:8]} ```---------``` *""~.gsub(/\x20.*\x20|\n/){})! a=0207;eval$s=%q!eval(%q~d,h,Y ___---------___ ,X=*$*.map(&:to_i),45;b=(a+d)% R=360;s=[v=[include(Math)]] _---@^^@@, ^@@@@---_ ;T=PI*2;n=x=0;f=->{(n/=2)%2 >0?1:f[]*2+(n/=2)%2};g=- _-@@@''''' *^ ''^^^v-_ >{z=f[];z/2*(3-z%2*6)};" 8'8f'y;I;asr1mY?Sr$6r _-^''@^ -_ {+Gi{03G3=ZbpUo3l'}Yw CqxJfHIWd'R / ^@ ^@v\ MUS4&$r3D>GqL((/C ea&e'|PS@3aQ@-hL / ,,v@@@@\ ja+/Lru>]96]d_4W 9o][*A;J&..;a?@ / v@@@vv, ,:'''''@\ O'x.RmTPRK+Pol# U;o_wP`}6.g#?y | @@@@@@@@v ,v@@@@@@vv^ | 0`.lHNxLXjI^#S 5F-XcldGh_BZDc | @@@@@@@@@@, v@@@@@@@@@@@, | JTLKD)#e*CUo$. {c&a46;+AaGW*M | @@@@@@@@@@@ v@@@@@@@@@@@@@@@| R5".bytes{n=n* 90+-_1%91};190 | ^@@@@@@@@@@@v, @@@@@@@@@@@@@@@| .times{x+=e=(g []+g[].i)*T/R; | @@@@@@@@@@@@@@ '@@@@@@@@@@@@@@| e==0?s<<<(1..(d==0 ?h*w=h*4:25*w= | ,@@@@@@@@@@@@^ @@@@@@@v| 80)).map{|i|q= i/w*6+3;r=i%w;" \ v@@@@@@@@^^'' @@@@@@^/ \s'*^,:v@\nXa=# {"%04o"%b};eval$ \@@@@@^' @@@@@@'/ s=%q\x21#$s\x21" [r>0?X&&r==(X+168 \^' v@@@@@ / )%R*w/R&&q/6==(90 -Y)*h/180?9:(0..2) \ v@@@@@/ .all?{e=d==0?cos(q* T/w/3):(r*3i-120i-q+ \ @@@@@/ 73)/Complex.polar(72 ,2/4.9);q-=2;y,x=e.re -_ @@@_- ct;e.abs<1&&n+=n-s.ma p{|s|z=sqrt(1-y*y);c=d== -_ _- 0?r*T/(1-w):b*T/R+acos(x );g=0;s.sum{(g-g=atan2(sin( --__ __-- o=_1+c),z/tan(_2)+y*cos(o)) /T).round}}.min/9}?n%8:i+9:8]} ```---------``` *""~.gsub(/\x20.*\x20|\n/){})! 45-degree rotation

TRICK 2022: mame.rb • Features – The rotation angle can be specified: ruby mame.rb 30 – The map can be dumped • Techniques – ASCII-art code – Stateful quine – Some algorithm (Compression of polygon map data) – Some math (Spherical trigonometry)

Tips: ASCII-art programming in Ruby • %w (string array notation) • with Array#join %w(foo bar) #=> ["foo", "bar"] %w(foo bar).join #=> "foobar"

Tips: ASCII-art programming in Ruby (cont'd) • … with "eval" • Now able to format Ruby code as you like eval(%w( pu ts "H el lo ,w or ld ").join) #=> Hello,world eval %w(p u t s " h i ").join #=> hi

Stateful Quine • Non-stateful Quine • Stateful Quine eval s=%q(puts " eval s=%q(#{s})") n=1;eval s=%q(puts "n=#{n+1};eval s=%q(#{s})") $ ruby stateful-quine.rb n=2;eval s=%q(puts "n=#{n+1};eval s=%q(#{s})") $ ruby stateful-quine.rb | ruby n=3;eval s=%q(puts "n=#{n+1};eval s=%q(#{s})") $ ruby stateful-quine.rb | ruby | ruby n=4;eval s=%q(puts "n=#{n+1};eval s=%q(#{s})")

TRICK 2022: "Best fishbowl" award by tompng eval((s=%~c=(0..35 ).map{s[2*_1+1]}*'';class$Inte ger;def$quXinclude(Math ;spXo(a)=self* a.pow(87X=h=32.chr;g=PI/480;ls=(sp*31X,89)%89; def$abX+'eval((s=%'+(n=? .next)+s*88.chr+[nXs()=[a =self%X+'.split(',sp*25+'?'+88.chr+');(0..36).mapX89,89- a].miX{s[2*_1].split}',sp*31+".join.tr('$',$/)))"]*$/)Xn;end ;reqX.split$/;trap(:INT){puts;exit};q=->t,i{a,y=((t+i*99)Xuire 'matrX%960). ivmod(80);[(a*(7+i)+i*23)%79+(y+a)/(5+i%4)%2,39Xix';1 5.tiX-y/2]};p=->t,u{a=->b,c{(0..5).sum{(u%2-1)*E**(t*(b+c*_1)*gXmes{ |i,*X.i+ i*u+=5+sin(u*u))}};x,z=a[5,3]. 5,3].rect;x+=y.Xv|z= *?!Xi a[19,4];z+=w;r=(4+(x.abs+z.i).ab };t=(0..959).fX..? W,?Xind{|t|(0..29).all?{x,y=q[t,_1];(x 2||h=ls[y][x]X[,* ?]..X[/[^!-}]/]}};h=($**h+h).chr;eval( []} ->(x,yX?};a =(0X,a,b){x=x*36+39.5;y=19.5-y*18;b*=1 |i|((yX..1 34)X-b).ceil..y+b).map{|j|((x-i)/a+(y j)/ .times{X.ma p{zXx,z=p[t,_1];l=u```=0;while``````(l<1)``; u+```=0 ;d=x-y;X.in dex(Xl+=(d.abs+(z-w``)``.i).ab``s*1.``1 ;x``,z=y``,w;o[v``=``x.r d.imag/Xc[i+ 15*Xd.abs*l*sin(2*``l-t``*g*80``-_1) l*(``1-l)/``6,a``=l*( -l)**2*0.X_1] )};X7,a*2]&&o[v,z,``0.0``3,l**`` ``times``{|i``|(8+i).times{|Xw=* MatXj|o[sin(i)/2+````` ```sin( `/2.0`````````)*j/200,j*0.0Xrix [*(X5-1,0.02,0.1]``}} ``. q[t,``_1];m``[y][x]= };i=-X0.. 44).X1;$><<(['%%','[H .map{|j|(0..79).map{|k|x=(Xmap{ |i,X -39.5)/35.8;y=( i+=1;m[j][k]?h:c[i]):ls[j]X*b| v<l { v9 { P l ga%]AK$#BrjXb<

tompng.rb • 960-frame fishbowl animation – Each frame is an executable Ruby code (Quine) • Techniques – ASCII-art code – Stateful Quine – 2D graphics for fish and grass – Error correction

tompng3.rb eval((s=%~c=(0..35 ).map{s[2*_1+1]}*'';class$Inte ger;def$quXinclude(Math ;spXo(a)=self* a.pow(87X=h=32.chr;g=PI/480;ls=(sp*31X,89)%89; def$abX+'eval((s=%'+(n=? .next)+s*88.chr+[nXs()=[a =self%X+'.split(',sp*25+'?'+88.chr+');(0..36).mapX89,89- a].miX{s[2*_1].split}',sp*31+".join.tr('$',$/)))"]*$/)Xn;end ;reqX.split$/;trap(:INT){puts;exit};q=->t,i{a,y=((t+i*99)Xuire 'matrX%960). ivmod(80);[(a*(7+i)+i*23)%79+(y+a)/(5+i%4)%2,39Xix';1 5.tiX-y/2]};p=->t,u{a=->b,c{(0..5).sum{(u%2-1)*E**(t*(b+c*_1)*gXmes{ |i,*X.i+ i*u+=5+sin(u*u))}};x,z=a[5,3]. 5,3].rect;x+=y.Xv|z= *?!Xi a[19,4];z+=w;r=(4+(x.abs+z.i).ab };t=(0..959).fX..? W,?Xind{|t|(0..29).all?{x,y=q[t,_1];(x 2||h=ls[y][x]X[,* ?]..X[/[^!-}]/]}};h=($**h+h).chr;eval( []} ->(x,yX?};a =(0X,a,b){x=x*36+39.5;y=19.5-y*18;b*=1 |i|((yX..1 34)X-b).ceil..y+b).map{|j|((x-i)/a+(y j)/ .times{X.ma p{zXx,z=p[t,_1];l=u```=0;while``````(l<1)``; u+```=0 ;d=x-y;X.in dex(Xl+=(d.abs+(z-w``)``.i).ab``s*1.``1 ;x``,z=y``,w;o[v``=``x.r d.imag/Xc[i+ 15*Xd.abs*l*sin(2*``l-t``*g*80``-_1) l*(``1-l)/``6,a``=l*( -l)**2*0.X_1] )};X7,a*2]&&o[v,z,``0.0``3,l**`` ``times``{|i``|(8+i).times{|Xw=* MatXj|o[sin(i)/2+````` ```sin( `/2.0`````````)*j/200,j*0.0Xrix [*(X5-1,0.02,0.1]``}} ``. q[t,``_1];m``[y][x]= };i=-X0.. 44).X1;$><<(['%%','[H .map{|j|(0..79).map{|k|x=(Xmap{ |i,X -39.5)/35.8;y=( i+=1;m[j][k]?h:c[i]):ls[j]X*b| v<l { v9 { P l ga%]AK$#BrjXb<

tompng3.rb eval((s=%~c=(0..35 ).map{s[2*_1+1]}*'';class$Inte ger;def$quXinclude(Math);spXo(a)=self* a.pow(87X=h=32.chr;g=PI/480;ls=(sp*31X,89)%89; def$abX+'eval((s=%'+(n=?}.next)+s*88.chr+[nXs()=[a =self%X+'.split(',sp*25+'?'+88.chr+');(0..36).mapX89,89- a].miX{s[2*_1].split}',sp*31+".join.tr('$',$/)))"]*$/)Xn;end ;reqX.split$/;trap(:INT){puts;exit};q=->t,i{a,y=((t+i*99)Xuire 'matrX%960).divmod(80);[(a*(7+i)+i*23)%79+(y+a)/(5+i%4)%2,39Xix';1 5.tiX-y/2]};p=->t,u{a=->b,c{(0..5).sum{(u%2-1)*E**(t*(b+c*_1)*gXmes{ |i,*X.i+6i*u+=5+sin(u*u))}};x,z=a[5,3].rect;y,w=a[5,3].rect;x+=y.Xv|z= *?!Xi+a[19,4];z+=w;r=(4+(x.abs+z.i).abs)/1.5;[x/r,z/r]};t=(0..959).fX..? W,?Xind{|t|(0..29).all?{x,y=q[t,_1];(x+y*2i-40-40i).abs>32||h=ls[y][x]X[,* ?]..X[/[^!-}]/]}};h=($**h+h).chr;eval(%!loop{m=(0..39).map{[]};o=->(x,yX?};a =(0X,a,b){x=x*36+39.5;y=19.5-y*18;b*=18;((x-a*=36).ceil..x+a).map{|i|((yX..1 34)X-b).ceil..y+b).map{|j|((x-i)/a+(y-j)/b.i).abs<1&&m[j][i]=1}}};3.times{X.ma p{zXx,z=p[t,_1];l=u```=0;while``````(l<1)``;y,w``=p[t-u+```=0.2,_1];d=x-y;X.in dex(Xl+=(d.abs+(z-w``)``.i).ab``s*1.``15;x``,z=y``,w;o[v``=``x.real+d.imag/Xc[i+ 15*Xd.abs*l*sin(2*``l-t``*g*80``-_1)``/8,z``+l*(``1-l)/``6,a``=l*(1-l)**2*0.X_1] )};X7,a*2]&&o[v,z,``0.0``3,l**``4/`6``]end``};8.``times``{|i``|(8+i).times{|Xw=* MatXj|o[sin(i)/2+`````````sin(``-t*```g*20``+i+j``/2.0`````````)*j/200,j*0.0Xrix [*(X5-1,0.02,0.1]``}};30``.time`````s``{x,y``````=q[t,``_1];m``[y][x]=1};i=-X0.. 44).X1;$><<(['%%','[H','[J%;'<<13]*27.chr+(0..39).map{|j|(0..79).map{|k|x=(Xmap{ |i,Xk-39.5)/35.8;y=(j-19.5)/17.9;(1>r=x*x+y*y)?(i+=1;m[j][k]?h:c[i]):ls[j]X*b| v<lx{+8+H1v9"l[{L.FP)l|Dga%]AK$#BrjXb<

$rL+5g,j]Tf1^B

Note • Both of the above two were Quine • But TRICK is not a contest for Quine

TRICK 2013: "Best pangram" award by kinaba • This code consists of all printable ASCII characters (32..126) • This code outputs all printable ASCII characters !@THEqQUICKbBROWNfFXjJMPSvVLAZYDGgkyz&[%r{\"}mosx,4>6]|?'while(putc 3_0-~$.+=9/2^5;)<18*7and:`# $ ruby kinaba1.rb !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~

kinaba1.rb • Under a pangram – A local variable: You can define one, but you cannot read it – A number: Need to make by calculation – Unneeded symbols: Need to discard well \"}mosx,4>6]|?'while(putc 3_0-~$.+=9/2^5;)<18*7and:`# Use of a special variable $. 9/2^5 = 1 3_0 = 30 18*7 = 126

TRICK 2018: "Most reserved" award by kinaba • This is a no-op program that consists only of all reserved words alias BEGIN for unless def class super true or return defined? next break while begin undef do end rescue then retry else undef module nil ensure case if yield __LINE__ self and redo elsif not __FILE__ alias END in end when __ENCODING__ end until false end

TRICK 2022: "Most anti-gravity" award by mame 2022;"# .chars} {puts'TRICK+2022' \ { ; #';$><< b ?! };#{s=' ' # 0 ! s[0]? ( b=$<.read ;' } ub( ,''} ';a= ''<<32 b.lines {puts( ?.. *( b.size) .gsub(/./) { b.sub!( /^#$`\K(\S) /x,a)?$1:a } .rstrip)}): ( [ 12,1,12,11]. cycle { | i | t = ( s * 10<< 10)* 10+ %(\e[A)* 10 10. times{t[i* _1 ] = 'TRICK+2022'[ _1 ] };$><

mame2.rb 2022;"# .chars} {puts'TRICK+2022' \ { ; #';$><< b ?! };#{s=' ' # 0 ! s[0]? ( b=$<.read ;' } ub( ,''} ';a= ''<<32 b.lines {puts( ?.. *( b.size) .gsub(/./) { b.sub!( /^#$`\K(\S) /x,a)?$1:a } .rstrip)}): ( [ 12,1,12,11]. cycle { | i | t = ( s * 10<< 10)* 10+ %(\e[A)* 10 10. times{t[i* _1 ] = 'TRICK+2022'[ _1 ] };$><<<

mame2.rb 2022;"# .chars} {puts'TRICK+2022' \ { ; #';$><< b ?! };#{s=' ' # 0 ! s[0]? ( b=$<.read ;' } ub( ,''} ';a= ''<<32 b.lines {puts( ?.. *( b.size) .gsub(/./) { b.sub!( /^#$`\K(\S) /x,a)?$1:a } .rstrip)}): ( [ 12,1,12,11]. cycle { | i | t = ( s * 10<< 10)* 10+ %(\e[A)* 10 10. times{t[i* _1 ] = 'TRICK+2022'[ _1 ] };$><<< b .gsub(''<<32,'') };#?!=' ' 12,{puts()?..\*: !;s{s]? ( i |ub(/./`\{(}S* }.a[0es [ = s/x/^#$$1Ka[}[ '.l=ne) | 1,,a)?ri:)2) b.siz!( ] 't.rst1]p* i bysib1( ] lT12,1[s.* ' b0cue1{ }%=\(eA)t c0K}t 10. }$ < ) 1 p 1 1 " upward gravity left.rb: "Left gravity" program

mame2.rb 2022;"# .chars} {puts'TRICK+2022' \ { ; #';$><< b ?! };#{s=' ' # 0 ! s[0]? ( b=$<.read ;' } ub( ,''} ';a= ''<<32 b.lines {puts( ?.. *( b.size) .gsub(/./) { b.sub!( /^#$`\K(\S) /x,a)?$1:a } .rstrip)}): ( [ 12,1,12,11]. cycle { | i | t = ( s * 10<< 10)* 10+ %(\e[A)* 10 10. times{t[i* _1 ] = 'TRICK+2022'[ _1 ] };$><<< b .gsub(''<<32,'') };#?!=' ' 12,{puts()?..\*: !;s{s]? ( i |ub(/./`\{(}S* }.a[0es [ = s/x/^#$$1Ka[}[ '.l=ne) | 1,,a)?ri:)2) b.siz!( ] 't.rst1]p* i bysib1( ] lT12,1[s.* ' b0cue1{ }%=\(eA)t c0K}t 10. }$ < ) 1 p 1 1 " 2022;"#{puts'TRICK+2022'} .chars}\#{b=$<.read;0;'( #';$><K}t 10.}$<) 1p1 1" Prints "TRICK+2022" up and then left

mame2.rb 2022;"# .chars} {puts'TRICK+2022' \ { ; #';$><< b ?! };#{s=' ' # 0 ! s[0]? ( b=$<.read ;' } ub( ,''} ';a= ''<<32 b.lines {puts( ?.. *( b.size) .gsub(/./) { b.sub!( /^#$`\K(\S) /x,a)?$1:a } .rstrip)}): ( [ 12,1,12,11]. cycle { | i | t = ( s * 10<< 10)* 10+ %(\e[A)* 10 10. times{t[i* _1 ] = 'TRICK+2022'[ _1 ] };$><<<<<'=$ts(?..*( #';{s='b32ub(/./){ ?!#0]?(}pu$`\K(\S) };[(,'') 10.=p1} 10]} 10]e _1e _1 sl }"

mame2.rb • The TRICK for left gravity • The TRICK for upward gravity "\ #{code1} # {code2}" "\#{code1} #{code2}" left gravity "x x#{code1} xx{code2} " "x{code1} x#{code2} xx " upward gravity

Are you getting interested? • Introduced weird Ruby programs and explained implementation tips – For other winning entries of TRICK, check: No k! http://github.com/tric /

IMPORTANT NOTICE • We are accepting submissions for TRICK 2025! –Deadline: Feb. 28, 2025 – Announce: Apr. 16--18, 2025 @ RubyKaigi 2025 – We want your weird Ruby programs! http://github.com/tric/trick2025

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