How do I extend the String class, and attach a method named to_bytes?
如何扩展String类，并附加一个名为to_bytes的方法?
3 个解决方案
#1
23
Ruby already has a String#each_byte method which is aliased to String#bytes.
Ruby已经有一个字符串#each_byte方法，它被别名为字符串#bytes。
Prior to Ruby 1.9 strings were equivalent to byte arrays, i.e. a character was assumed to be a single byte. That's fine for ASCII text and various text encodings like Win-1252 and ISO-8859-1 but fails badly with Unicode, which we see more and more often on the web. Ruby 1.9+ is Unicode aware, and strings are no longer considered to be made up of bytes, but instead consist of characters, which can be multiple bytes long.
在Ruby 1.9字符串之前，字符串相当于字节数组，即假定字符为单个字节。对于ASCII文本和各种文本编码(如Win-1252和ISO-8859-1)来说，这是没问题的，但在Unicode(我们在web上看到的越来越多)上，它却很糟糕。Ruby 1.9+支持Unicode，字符串不再被认为是由字节组成的，而是由字符组成，字符可以是多个字节长。
So, if you are trying to manipulate text as single bytes, you'll need to ensure your input is ASCII, or at least a single-byte-based character set. If you might have multi-byte characters you should use String#each_char or String.split(//) or String.unpack with the U flag.
因此，如果您试图以单个字节来操作文本，那么您需要确保您的输入是ASCII，或者至少是一个基于单字节的字符集。如果您可能有多字节字符，那么您应该使用String#each_char或String.split(//)或String。打开美国国旗。
What does // mean in
String.split(//)//在字符串中是什么意思?
// is the same as using ''. Either tells split to return characters. You can also usually use chars.
//和use是一样的。要么告诉split返回字符。你也可以使用chars。
#2
36
String#bytes returns enumerator through string bytes. .to_a can convert it to an array.
字符串#bytes通过字符串字节返回枚举器。.to_a可以将其转换为数组。
"asd".bytes.to_a
=> [97, 115, 100]
#3
0
With the help of unpack we can convert the string into any format:- byte, bite(MSB,LSB), ASCII or hex. please go through this link:- http://blog.bigbinary.com/2011/07/20/ruby-pack-unpack.html. To convert string into bytes:-
在解包的帮助下，我们可以将字符串转换成任何格式:- byte, bite(MSB,LSB)， ASCII或十六进制。请通过这个链接:- http://blog.bigbinary.com/2011/07/20/ruby-pack-unpack.html。将字符串转换成字节:-
"abcde".unpack('c*')
=> [97, 98, 99, 100, 101]
#1
23
Ruby already has a String#each_byte method which is aliased to String#bytes.
Ruby已经有一个字符串#each_byte方法，它被别名为字符串#bytes。
Prior to Ruby 1.9 strings were equivalent to byte arrays, i.e. a character was assumed to be a single byte. That's fine for ASCII text and various text encodings like Win-1252 and ISO-8859-1 but fails badly with Unicode, which we see more and more often on the web. Ruby 1.9+ is Unicode aware, and strings are no longer considered to be made up of bytes, but instead consist of characters, which can be multiple bytes long.
在Ruby 1.9字符串之前，字符串相当于字节数组，即假定字符为单个字节。对于ASCII文本和各种文本编码(如Win-1252和ISO-8859-1)来说，这是没问题的，但在Unicode(我们在web上看到的越来越多)上，它却很糟糕。Ruby 1.9+支持Unicode，字符串不再被认为是由字节组成的，而是由字符组成，字符可以是多个字节长。
So, if you are trying to manipulate text as single bytes, you'll need to ensure your input is ASCII, or at least a single-byte-based character set. If you might have multi-byte characters you should use String#each_char or String.split(//) or String.unpack with the U flag.
因此，如果您试图以单个字节来操作文本，那么您需要确保您的输入是ASCII，或者至少是一个基于单字节的字符集。如果您可能有多字节字符，那么您应该使用String#each_char或String.split(//)或String。打开美国国旗。
What does // mean in
String.split(//)//在字符串中是什么意思?
// is the same as using ''. Either tells split to return characters. You can also usually use chars.
//和use是一样的。要么告诉split返回字符。你也可以使用chars。
#2
36
String#bytes returns enumerator through string bytes. .to_a can convert it to an array.
字符串#bytes通过字符串字节返回枚举器。.to_a可以将其转换为数组。
"asd".bytes.to_a
=> [97, 115, 100]
#3
0
With the help of unpack we can convert the string into any format:- byte, bite(MSB,LSB), ASCII or hex. please go through this link:- http://blog.bigbinary.com/2011/07/20/ruby-pack-unpack.html. To convert string into bytes:-
在解包的帮助下，我们可以将字符串转换成任何格式:- byte, bite(MSB,LSB)， ASCII或十六进制。请通过这个链接:- http://blog.bigbinary.com/2011/07/20/ruby-pack-unpack.html。将字符串转换成字节:-
"abcde".unpack('c*')
=> [97, 98, 99, 100, 101]