turning a string into array of ASCII bytes

[David Garamond]

What is the shortest, most straightforward way (without temporary
variables, etc)?

My best route is now "1234".split(//).collect{|c|c[0]} but I'm sure
there is a much better way. Also it's a bit slow.

 

[Stefan Scholl]

What is the shortest, most straightforward way (without temporary
variables, etc)?

Do you really need an array? You can access the ASCII codes of every
character in a string with [].

irb(main):001:0> a='David'
=> "David"
irb(main):002:0> a[0]
=> 68
irb(main):003:0> a[1]
=> 97

 

[Robert Klemme]

What is the shortest, most straightforward way (without temporary
variables, etc)?

Do you really need an array? You can access the ASCII codes of every
character in a string with [].

Currently, that's so. However, I believe that such behavior is due to
be phased out in the future, in order to have subscripting be more consistent
(i.e. so that s[0] and s[0,1] return the same thing, as is already true
of arrays).

But you can be sure that then there will be another method (possibly
String#at(index)) that is equivalent to String#[index] of today.

robert

 

[T. Onoma]

(i.e. so that s[0] and s[0,1] return the same thing, as is already true
of arrays).

But you can be sure that then there will be another method (possibly
String#at(index)) that is equivalent to String#[index] of today.

or

str[index].asc as the opposite of Integer#chr, perhaps?

i thought we already had this but i can't seem to find it so guess we don't.

-t0

 

[Ara.T.Howard]

Date: Thu, 27 Nov 2003 02:37:02 +0900
From: T. Onoma <[email protected]>
Newsgroups: comp.lang.ruby
Subject: Re: turning a string into array of ASCII bytes

(i.e. so that s[0] and s[0,1] return the same thing, as is already true
of arrays).

But you can be sure that then there will be another method (possibly
String#at(index)) that is equivalent to String#[index] of today.

or

str[index].asc as the opposite of Integer#chr, perhaps?

i thought we already had this but i can't seem to find it so guess we don't.

-t0

you mean this?

~ > irb
irb(main):001:0> 42.chr
=> "*"

irb(main):002:0> 42.chr[0]
=> 42

irb(main):003:0> "*"[0]
=> 42

irb(main):004:0> "*"[0].chr
=> "*"



-a
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[Stefan Scholl]

Do you really need an array? You can access the ASCII codes of every
character in a string with [].

Currently, that's so. However, I believe that such behavior is due to
be phased out in the future, in order to have subscripting be more consistent
(i.e. so that s[0] and s[0,1] return the same thing, as is already true
of arrays).

Who wants to use such a language? I don't want to rewrite my code
every few months.

If these tiny little methods aren't stable enough to be mentioned in
an answer then I'm really wrong here. :-(

 

[Robert Klemme]

(i.e. so that s[0] and s[0,1] return the same thing, as is already true
of arrays).

But you can be sure that then there will be another method (possibly
String#at(index)) that is equivalent to String#[index] of today.

or

str[index].asc as the opposite of Integer#chr, perhaps?

Inefficient since in the future str[index] would return a string (see the
other postings in the thread). It would be a bad idea to create a new
string just to get at the ascii value of it's first character.

i thought we already had this but i can't seem to find it so guess we

don't.

Currently str[index] returns an int denoting the ascii value.

robert