我试图用任何类型的字符保存二进制文件,例如:
$ LC_CTYPE=en_US.UTF-8 erl
Erlang/OTP 20 [erts-9.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Eshell V9.2 (abort with ^G)
1> TextBinaryWithSpecialChar = <<" Hey, If you’re down, I’m here to help">>.
<<32,72,101,121,44,32,73,102,32,121,111,117,25,114,101,32,
100,111,119,110,44,32,73,25,109,32,104,101,114,...>>
2>
我怎样才能保存我想要的东西:<<“嘿,如果你失败了,我来帮忙”>>
1> <<"you’re"/utf8>>.
<<121,111,117,226,128,153,114,101>>
在UTF-8中,“右单引号”由三个字节表示:
Hex
Notation
-------
1st byte: E2 => E=14 2
1110 0010 = 226
2nd byte: 80 => 8 0
1000 0000 = 128
3rd byte: 99 => 9 9
1001 1001 = 153
我不知道当你没有为二进制文件指定utf8时,erlang如何获得25
的“Right Single Quotation Mark”。 (14 + 2 + 9 = 25?)
在erlang中,"abc"
只是列表[97,98,99]
的快捷方式,类似于二进制文件:
5> <<97,98,99>>.
<<"abc">>
shell是否显示字符或数字是无关紧要的:
6> <<97,98,99>> == <<"abc">>.
true