In Erlang how do I convert a String to a binary value?

问题

In Erlang how do I convert a string to a binary value?

String = "Hello"
%% should be
Binary = <<"Hello">>

回答1:

In Erlang strings are represented as a list of integers. You can therefore use the list_to_binary (built-in-function, aka BIF). Here is an example I ran in the Erlang console (started with erl):

1> list_to_binary("hello world").
<<"hello world">>

回答2:

the unicode (utf-8/16/32) character set needs more number of bits to express characters that are greater than 1-byte in length: this is why the above call failed for any byte value > 255 (the limit of information that a byte can hold, and which is sufficient for IS0-8859/ASCII/Latin1)

to correctly handle unicode characters you'd need to use

unicode:characters_to_binary() R1[(N>3)]

instead, which can handle both Latin1 AND unicode encoding.

HTH ...

来源：https://stackoverflow.com/questions/2268828/in-erlang-how-do-i-convert-a-string-to-a-binary-value