Rで学ぶBrainf*ck

NOTE Wednesday, March 4, 2009

NOTE id:mickey24 Wednesday, March 4, 2009

R Brainf*ck 2009/03/01 id:mickey24 Wednesday, March 4, 2009

id: mickey24 (@mickey24) Wednesday, March 4, 2009

Wednesday, March 4, 2009

R Brainf*ck Wednesday, March 4, 2009

• Brainf*ck • • • Wednesday, March 4, 2009

Brainf*ck Wednesday, March 4, 2009

Brainf*ck • Wednesday, March 4, 2009

Brainf*ck • • Urban Müller, 1993 Wednesday, March 4, 2009

Brainf*ck • • Urban Müller, 1993 • Wednesday, March 4, 2009

Brainf*ck • • Urban Müller, 1993 • • Brainf*ck Wednesday, March 4, 2009

Brainf*ck • • Urban Müller, 1993 • • Brainf*ck • Brainfu*k Wednesday, March 4, 2009

Brainf*ck 8 Wednesday, March 4, 2009

Brainf*ck > • < • + • - • . • , • [ • ] • Wednesday, March 4, 2009

Hello, World! +++++++++[>++++++++>++++++++++ +>+++++<<<-]>.>++.+++++++..+++ .>-.------------.<++++++++.--- -----.+++.------.--------.>+. Wednesday, March 4, 2009

FizzBuzz ++++++[->++++>>+>+>-<<<<<]>[<++++>>++ +>++++>>+++>+++++>+++++>>>>>>++>>++<< <<<<<<<<<<<<-]<++++>+++>-->+++>->>--- >++>>>+++++[->++>++<<]<<<<<<<<<<[->-[ >>>>>>>]>[<+++>.>.>>>>..>>>+<]<<<<<-[ >>>>]>[<+++++>.>.>..>>>+<]>>>>+<-[<<< ]<[[-<<+>>]>>>+>+<<<<<<[->>+>+>-<<<<] <]>>[[-]<]>[>>>[>.<<.<<<]<[.<<<<]>]>. <<<<<<<<<<<] Wednesday, March 4, 2009

Brainf*ck • Wednesday, March 4, 2009

Brainf*ck • • mem Wednesday, March 4, 2009

Brainf*ck • • mem • ptr Wednesday, March 4, 2009

1 2 3 4 5 6 7 8 mem 0 0 0 0 0 0 0 0 ptr Wednesday, March 4, 2009

Brainf*ck ptr • > : ptr++; • • < : ptr--; Wednesday, March 4, 2009

Brainf*ck ptr (mem) • + : (*ptr)++; • • - : (*ptr)--; Wednesday, March 4, 2009

Brainf*ck while • [ : while (*ptr) { • •]:} Wednesday, March 4, 2009

Brainf*ck ptr (mem) • or . : putchar(*ptr); • • , : *ptr = getchar(); Wednesday, March 4, 2009

ASCII Wednesday, March 4, 2009

A ++++++++++ ++++++++++ ++++++++++ ++++++++++ ++++++++++ ++++++++++ +++++. Wednesday, March 4, 2009

A 1 2 3 4 5 6 7 8 0 0 0 0 0 0 0 0 ++++++++++ ++++++++++ ++++++++++ ++++++++++ ++++++++++ ++++++++++ +++++. Wednesday, March 4, 2009

A 1 2 3 4 5 6 7 8 65 0 0 0 0 0 0 0 ++++++++++ ++++++++++ ++++++++++ ++++++++++ ++++++++++ ++++++++++ +++++. A Wednesday, March 4, 2009

++++++++[>++++++++<-]>+. Wednesday, March 4, 2009

•R Brainf*ck Wednesday, March 4, 2009

•R Brainf*ck • Wednesday, March 4, 2009

• ↓ • http://d.hatena.ne.jp/mickey24/20090301/ rdebrainfxxk Wednesday, March 4, 2009

brainfxxk <- function(code) { # # # } code <- quot;++++++++[>++++++++<-]>+.quot; brainfxxk(code) Wednesday, March 4, 2009

code <- strsplit(code,quot;quot;)[[1]] len <- length(code) pc <- 1 ptr <- 1 mem <- rep(0, 128) Wednesday, March 4, 2009

while (pc <= len) { switch(code[pc], quot;>quot; = inc_ptr(), quot;<quot; = dec_ptr(), quot;+quot; = inc_mem(), quot;-quot; = dec_mem(), quot;[quot; = wstart(), quot;]quot; = wend(), quot;.quot; = putc(), quot;,quot; = getc() ) pc <- pc + 1 } cat(quot;nquot;) Wednesday, March 4, 2009

> and < #> inc_ptr <- function() { ptr <<- ptr + 1 } #< dec_ptr <- function() { ptr <<- ptr - 1 } Wednesday, March 4, 2009

+ and - #+ inc_mem <- function() { mem[ptr] <<- mem[ptr] + 1 } #- dec_mem <- function() { mem[ptr] <<- mem[ptr] - 1 } Wednesday, March 4, 2009

[ #[ wstart <- function() { if (mem[ptr] == 0) { count <- 1 pc <<- pc + 1 while (count > 0) { if (code[pc] == quot;[quot;) { count <- count + 1; } if (code[pc] == quot;]quot;) { count <- count - 1; } pc <<- pc + 1 } pc <<- pc - 1 } } Wednesday, March 4, 2009

] #] wend <- function() { if (mem[ptr] != 0) { count <- 1 pc <<- pc - 1 while (count > 0) { if (code[pc] == quot;[quot;) { count <- count - 1; } if (code[pc] == quot;]quot;) { count <- count + 1; } pc <<- pc - 1 } pc <<- pc + 1 } } Wednesday, March 4, 2009

. and , Wednesday, March 4, 2009

•. •, •1 • Wednesday, March 4, 2009

. Wednesday, March 4, 2009

. • →ASCII Wednesday, March 4, 2009

. • →ASCII • . Wednesday, March 4, 2009

sprintf Wednesday, March 4, 2009

sprintf •C %c Wednesday, March 4, 2009

sprintf •C %c • %s Wednesday, March 4, 2009

sprintf •C %c • %s > sprintf(quot;%squot;,34) [1] quot;34quot; Wednesday, March 4, 2009

• Wednesday, March 4, 2009

• • Tsukuba.R#4 Wednesday, March 4, 2009

to_ascii <- function (x) { c(quot;quot;,quot;x1quot;,quot;x2quot;,quot;x3quot;,quot;x4quot;,quot;x5quot;,quot;x6quot;,quot;x7quot;,quot;x8quot;,quot;x9quot;,quot;xaquot;,quot;xbquot;,quot;xcquot;,quot;xdquot;,quot;xequot;,quot;xfquot;,quot;x10quot;,quot;x11quot;, quot;x12quot;,quot;x13quot;,quot;x14quot;,quot;x15quot;,quot;x16quot;,quot;x17quot;,quot;x18quot;,quot;x19quot;,quot;x1aquot;,quot;x1bquot;,quot;x1cquot;,quot;x1dquot;,quot;x1equot;,quot;x1fquot;,quot;x20 quot;,quot;x21quot;,quot;x22quot;,quot;x23quot;,quot;x24quot;,quot;x25quot;,quot;x26quot;,quot;x27quot;,quot;x28quot;,quot;x29quot;,quot;x2aquot;,quot;x2bquot;,quot;x2cquot;,quot;x2dquot;,quot;x2equot;,quot;x 2fquot;,quot;x30quot;,quot;x31quot;,quot;x32quot;,quot;x33quot;,quot;x34quot;,quot;x35quot;,quot;x36quot;,quot;x37quot;,quot;x38quot;,quot;x39quot;,quot;x3aquot;,quot;x3bquot;,quot;x3cquot;,quot;x3dquot;,quot; x3equot;,quot;x3fquot;,quot;x40quot;,quot;x41quot;,quot;x42quot;,quot;x43quot;,quot;x44quot;,quot;x45quot;,quot;x46quot;,quot;x47quot;,quot;x48quot;,quot;x49quot;,quot;x4aquot;,quot;x4bquot;,quot;x4cquot;, quot;x4dquot;,quot;x4equot;,quot;x4fquot;,quot;x50quot;,quot;x51quot;,quot;x52quot;,quot;x53quot;,quot;x54quot;,quot;x55quot;,quot;x56quot;,quot;x57quot;,quot;x58quot;,quot;x59quot;,quot;x5aquot;,quot;x5b quot;,quot;x5cquot;,quot;x5dquot;,quot;x5equot;,quot;x5fquot;,quot;x60quot;,quot;x61quot;,quot;x62quot;,quot;x63quot;,quot;x64quot;,quot;x65quot;,quot;x66quot;,quot;x67quot;,quot;x68quot;,quot;x69quot;,quot;x6 aquot;,quot;x6bquot;,quot;x6cquot;,quot;x6dquot;,quot;x6equot;,quot;x6fquot;,quot;x70quot;,quot;x71quot;,quot;x72quot;,quot;x73quot;,quot;x74quot;,quot;x75quot;,quot;x76quot;,quot;x77quot;,quot;x78quot;,quot;x 79quot;,quot;x7aquot;,quot;x7bquot;,quot;x7cquot;,quot;x7dquot;,quot;x7equot;,quot;x7fquot;,quot;x80quot;,quot;x81quot;,quot;x82quot;,quot;x83quot;,quot;x84quot;,quot;x85quot;,quot;x86quot;,quot;x87quot;,quot; x88quot;,quot;x89quot;,quot;x8aquot;,quot;x8bquot;,quot;x8cquot;,quot;x8dquot;,quot;x8equot;,quot;x8fquot;,quot;x90quot;,quot;x91quot;,quot;x92quot;,quot;x93quot;,quot;x94quot;,quot;x95quot;,quot;x96quot;, quot;x97quot;,quot;x98quot;,quot;x99quot;,quot;x9aquot;,quot;x9bquot;,quot;x9cquot;,quot;x9dquot;,quot;x9equot;,quot;x9fquot;,quot;xa0quot;,quot;xa1quot;,quot;xa2quot;,quot;xa3quot;,quot;xa4quot;,quot;xa5quot;, quot;xa6quot;,quot;xa7quot;,quot;xa8quot;,quot;xa9quot;,quot;xaaquot;,quot;xabquot;,quot;xacquot;,quot;xadquot;,quot;xaequot;,quot;xafquot;,quot;xb0quot;,quot;xb1quot;,quot;xb2quot;,quot;xb3quot;,quot;xb4quot;,quot; xb5quot;,quot;xb6quot;,quot;xb7quot;,quot;xb8quot;,quot;xb9quot;,quot;xbaquot;,quot;xbbquot;,quot;xbcquot;,quot;xbdquot;,quot;xbequot;,quot;xbfquot;,quot;xc0quot;,quot;xc1quot;,quot;xc2quot;,quot;xc3quot;, quot;xc4quot;,quot;xc5quot;,quot;xc6quot;,quot;xc7quot;,quot;xc8quot;,quot;xc9quot;,quot;xcaquot;,quot;xcbquot;,quot;xccquot;,quot;xcdquot;,quot;xcequot;,quot;xcfquot;,quot;xd0quot;,quot;xd1quot;,quot;xd2quot;,quot; xd3quot;,quot;xd4quot;,quot;xd5quot;,quot;xd6quot;,quot;xd7quot;,quot;xd8quot;,quot;xd9quot;,quot;xdaquot;,quot;xdbquot;,quot;xdcquot;,quot;xddquot;,quot;xdequot;,quot;xdfquot;,quot;xe0quot;,quot;xe1quot;, quot;xe2quot;,quot;xe3quot;,quot;xe4quot;,quot;xe5quot;,quot;xe6quot;,quot;xe7quot;,quot;xe8quot;,quot;xe9quot;,quot;xeaquot;,quot;xebquot;,quot;xecquot;,quot;xedquot;,quot;xeequot;,quot;xefquot;,quot;xf0quot;,quot; xf1quot;,quot;xf2quot;,quot;xf3quot;,quot;xf4quot;,quot;xf5quot;,quot;xf6quot;,quot;xf7quot;,quot;xf8quot;,quot;xf9quot;,quot;xfaquot;,quot;xfbquot;,quot;xfcquot;,quot;xfdquot;,quot;xfequot;,quot;xffquot;)[x+1] } Wednesday, March 4, 2009

to_ascii <- function (x) { c(quot;quot;,quot;x1quot;,quot;x2quot;,quot;x3quot;,quot;x4quot;,quot;x5quot;,quot;x6quot;,quot;x7quot;,quot;x 8quot;,quot;x9quot;,quot;xaquot;,quot;xbquot;,quot;xcquot;,quot;xdquot;,quot;xequot;,quot;xfquot;,quot;x10 ... quot;xf2quot;,quot;xf3quot;,quot;xf4quot;,quot;xf5quot;,quot;xf6quot;,quot;xf7quot;,quot;xf8quot;,quot;x f9quot;,quot;xfaquot;,quot;xfbquot;,quot;xfcquot;,quot;xfdquot;,quot;xfequot;,quot;xffquot;)[x+1] } Wednesday, March 4, 2009

Ruby $ ruby -e '(0..255).each do |i| print quot;x%x,quot; % i end' Wednesday, March 4, 2009

> paste(mapply(to_ascii,c(72,101, 108,108,111,44,32,119,111,114,108, 100,33)),collapse=quot;quot;) [1] quot;Hello, world!quot; Wednesday, March 4, 2009

• intToUtf8 utf8ToInt Wednesday, March 4, 2009

• intToUtf8 utf8ToInt • Ω ΩΩ d(ry Wednesday, March 4, 2009

> paste(mapply(intToUtf8,c(72,101, 108,108,111,44,32,119,111,114,108, 100,33)),collapse=quot;quot;) [1] quot;Hello, world!quot; Wednesday, March 4, 2009

> paste(mapply(intToUtf8,c(72,101, 108,108,111,44,32,119,111,114,108, 100,33)),collapse=quot;quot;) [1] quot;Hello, world!quot; @twittoru++ Wednesday, March 4, 2009

. #. putc <- function() { cat(intToUtf8(mem[ptr])) } Wednesday, March 4, 2009

, Wednesday, March 4, 2009

, • (ry Wednesday, March 4, 2009

, • (ry • , (ry Wednesday, March 4, 2009

, • (ry • , (ry • Wednesday, March 4, 2009

, Wednesday, March 4, 2009

, • → Wednesday, March 4, 2009

, • → • utf8ToInt Wednesday, March 4, 2009

, • → • utf8ToInt • Wednesday, March 4, 2009

, #, buf <- quot;quot; # 1 getc <- function() { if (nchar(buf) == 0) { buf <<- readline() } mem[ptr] <<- utf8ToInt(substring(buf, 1, 1)) buf <<- substring(buf, 2) } Wednesday, March 4, 2009

1 Wednesday, March 4, 2009

• <<- Wednesday, March 4, 2009

• <<- • (<- NG) Wednesday, March 4, 2009

• <<- • (<- NG) • http://cse.naro.affrc.go.jp/takezawa/r-tips/r/32.html Wednesday, March 4, 2009

• <<- • (<- NG) • http://cse.naro.affrc.go.jp/takezawa/r-tips/r/32.html • Wednesday, March 4, 2009

> x <- 1 > inc_x <- function() { x <- x + 1 } > inc_x() Wednesday, March 4, 2009

> x <- 1 > inc_x <- function() { x <- x + 1 } > inc_x() >x [1] 1 # Wednesday, March 4, 2009

OK > x <- 1 > inc_x <- function() { x <<- x + 1 } > inc_x() Wednesday, March 4, 2009

OK > x <- 1 > inc_x <- function() { x <<- x + 1 } > inc_x() >x [1] 2 # OK! Wednesday, March 4, 2009

• • GIF • • Wednesday, March 4, 2009

• (2008) Ruby • R-Tips http://cse.naro.affrc.go.jp/takezawa/r-tips/r.html • RjpWiki http://www.okada.jp.org/RWiki/ Wednesday, March 4, 2009

Rで学ぶBrainf*ck

by mickey24 on Feb 28, 2009

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Rで学ぶBrainf*ck — Presentation Transcript