KOUCHANG KOUCHANG

## file0.erl
1> true andalso false.
false
2> true andalso ok.
ok
3> false orelse true.
true
4> false orelse ok.
ok

## vimコンパイル.txt
sudo ./configure --enable-multibyte --with-features=huge --disable-selinux --prefix=/usr/local --enable-luainterp=yes --with-lua-prefix=/usr --enable-pythoninterp

## hexlify_sample.erl
-module(hexlify_sample).

-export([hexlify/1]).

-define(TOHEX(X),
        begin
            <<X1:1, X2:1, X3:1, _:1>> = <<X:4>>,
            TenF = X1 band X2 bor X1 band bnot X2 band X3,
            X + (1 - TenF) * $0 + TenF * ($A - 10)
        end).