Hmm… I can turn a number into a character with .chr
I can convert my numbers with .to_s(2) ((where 2 is a radix, or base))
But how do I convert numbers to characters??
John J. wrote:
Hmm… I can turn a number into a character with .chr
I can convert my numbers with .to_s(2) ((where 2 is a radix, or base))
But how do I convert numbers to characters??
I don’t understand what you mean - “to_s(b)” builds a string. What do
you mean by “convert numbers to characters” (example).
Wolfgang Nádasi-Donner
On Aug 16, 2007, at 2:57 PM, Wolfgang Nádasi-Donner wrote:
–
Posted via http://www.ruby-forum.com/.
yes it builds a string representation of a number.
I want to take a hex or binary number though and return a character.
0x49 for example is “I”
John J. wrote:
On Aug 16, 2007, at 2:57 PM, Wolfgang N�dasi-Donner wrote:
–
Posted via http://www.ruby-forum.com/.yes it builds a string representation of a number.
I want to take a hex or binary number though and return a character.
0x49 for example is “I”
irb(main):002:0> 0x49.chr
=> “I”
It works!
Alle giovedì 16 agosto 2007, John J. ha scritto:
Wolfgang Nádasi-Donner
Posted via http://www.ruby-forum.com/.
yes it builds a string representation of a number.
I want to take a hex or binary number though and return a character.
0x49 for example is “I”
I think you need Integer#chr:
0x49.chr
=> ‘I’
Stefano
John J. wrote:
Hmm… I can turn a number into a character with .chr
I can convert my numbers with .to_s(2) ((where 2 is a radix, or base))
But how do I convert numbers to characters??
You may be looking for Array#pack. It’s useful for converting an array
from one encoding to another. One of these possibilities is to convert
an array of numbers into a string:
n = [65, 66, 67]
n.pack(“c*”)
#=> “ABC”
Pack (and unpack) can do tons of useful and surprising things.
Tom
On 8/16/07, John J. [email protected] wrote:
Oops, no, that’s not what I need. I can do that.
I need to take “I” or “J” or whatever character and convert to hex!
or binary
(sorry, I’m a little sleepy now)
like this?
irb(main):011:0> s = “A”
=> “A”
irb(main):012:0> s[0]
=> 65
irb(main):013:0> c = ?A
=> 65
irb(main):014:0> s[0].to_s(16)
=> “41”
irb(main):015:0> c.to_s(16)
=> “41”
irb(main):016:0> c.to_s(2)
=> “1000001”
On Aug 16, 2007, at 3:22 PM, Stefano C. wrote:
you mean by “convert numbers to characters” (example).
0x49.chr
=> ‘I’Stefano
Oops, no, that’s not what I need. I can do that.
I need to take “I” or “J” or whatever character and convert to hex!
or binary
(sorry, I’m a little sleepy now)
On Aug 16, 2007, at 3:36 PM, Adam S. wrote:
=> “A”
Hmm… that first technique is useful! Returning elements of a string.
John J. wrote:
(sorry, I’m a little sleepy now)
Ah well in that case:
?I
=> 73
?I.to_s(2)
=> “1001001”
?I.to_s(16)
=> “49”
Tom Preston-Werner
On Aug 16, 2007, at 3:27 PM, Tom W. wrote:
to convert an array of numbers into a string:
n = [65, 66, 67]
n.pack(“c*”)
#=> “ABC”Pack (and unpack) can do tons of useful and surprising things.
Tom
The creator of god! I must listen carefully.
I after some reading, I’m starting to think about using the files
signatures used by DROID / PRONOM
Anyone know much about that stuff? Any Ruby implementations/bindings?
- John J. [email protected] (22:50) schrieb:
Hmm… that first technique is useful! Returning elements of a string.
Gut that won’t work in Ruby 1.9. “haha”[0] is 104 in 1.8 but “h” in 1.9.
You have to use “haha”.bytes.first in Ruby 1.9, but that won’t work in
1.8.
mfg, simon … l