bin2str conversion

[Zangief Ief]

Hello,

I would like to write a function which is able to convert a binary data
into its string format...
For example, here I have the opposite of my goal:

str.unpack('c*').collect { |x| sprintf('%02x', x) }.to_s.hex.to_s(2)

As you can see, this line can convert the string *str* to its binary
format.

Thanks for your help.

Zhang'

 

[Todd Benson]

Hello,

I would like to write a function which is able to convert a binary data
into its string format...
For example, here I have the opposite of my goal:

str.unpack('c*').collect { |x| sprintf('%02x', x) }.to_s.hex.to_s(2)

Just so you know, at least on 1.8.6, this code will only return the
binary for one character, the first one.

Have you looked at Array#pack? That might be what you look for.

Todd

 

[Zangief Ief]

Have you looked at Array#pack? That might be what you look for.

Actually I think a good way to do it would be to use the Array#pack
method. But after some tests, I haven't do it successfully.

 

[Arlen Cuss]

[Note: parts of this message were removed to make it a legal post.]

Hi,

I would like to write a function which is able to convert a binary data
into its string format...

So, for example, do you want to be able to take some string, and turn it
into something that looks like "98892963bf862bdeb6af019fce", and then back
again? I'm just trying to work out your meaning of binary data/string
format!

Arlen

 

[Arlen Cuss]

[Note: parts of this message were removed to make it a legal post.]

Hi,

I would like to write a function which is able to convert a binary data
into its string format...
For example, here I have the opposite of my goal.

My apologies, I just got what you meant! How's this?

celtic@sohma:~$ cat test.rb
class String
def to_binary
self.unpack('c*').map {|x| x.to_s(2).rjust(8, '0')}.join
end

def self.from_binary b
b.scan(/.{8}/).map {|x| x.to_i(2)}.pack('c*')
end
end

string = "Hello, world!"
puts binary = string.to_binary
puts String.from_binary(binary)

celtic@sohma:~$ ruby test.rb
01001000011001010110110001101100011011110010110000100000011101110110111101110010011011000110010000100001
Hello, world!
celtic@sohma:~$

HTH,
Arlen.

 

[Zangief Ief]

Thank you Arlen Cuss, yes it's what I would like to found
But it seems there is a problem when we try to convert some special char
like "·.‘Nú∆Ã"

Macintosh:~ zhang$ ruby /Users/cyril/Desktop/test.rb
0-111110-10010010010111000-11110-10000000-1101000010011100-111101-100011000-11110-1111000-11110100-111101-1110001
?.?'

As you can see, there is some '-' char in the binary result...

 

[Arlen Cuss]

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ZWVycyEKQXJsZW4K

 

[Todd Benson]

Hi,




My apologies, I just got what you meant! How's this?

celtic@sohma:~$ cat test.rb
class String
def to_binary
self.unpack('C*').map {|x| x.to_s(2).rjust(8, '0')}.join

Not sure, but that ^^^^ line seems to be the same as this...

unpack('B*').first

end

def self.from_binary b
b.scan(/.{8}/).map {|x| x.to_i(2)}.pack('C*')

I thought I could come up with something better than this, but I guess
not right now

end
end

string = "Hello, world!"
puts binary = string.to_binary
puts String.from_binary(binary)

celtic@sohma:~$ ruby test.rb
01001000011001010110110001101100011011110010110000100000011101110110111101110010011011000110010000100001
Hello, world!
celtic@sohma:~$

HTH,
Arlen.

Todd

 

[Zangief Ief]

Thanks
Your answer was been very usefull. Simple and clear.