wrote= : > I am working through the Ruby Quiz website and I am already stuck on > number 1 - Solitaire Cypher. > > I have a string, let's say "RUBYC ODEIS THEBE STXXX". I need to convert > each letter to its corresponding number (i.e., A=3D1, B=3D2, etc.). > > I had hoped I could use gsub with a regexp like this: > > coded_text =3D text.gsub(/[A-Z/,[1-26]) > > but that doesn't work. Any ideas? > > -- > Posted via http://www.ruby-forum.com/. > > Regards, --=20 Duong Quang Ha (H=C3=A0 Quang D=C6=B0=C6=A1ng in Vietnamese) blog.haqduong.com --e89a8ff1cc407ecdb804c0b36386 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hello,

You can do this task in steps below:

1.= Create a hash contains character as key and its corresponding number as va= lue.

2. Use String#split to split the String into an array.

3. Use Array#collect to convert characters to=C2=A0corresponding numbe= r.

Example:

# Create hash= contains alphabetical table

alpha_table =3D {}

(('= A'..'Z').zip(1..26)).each { |x| alpha_table[x[0]] =3D x[1] }

s =3D=C2=A0"RUBYC" # String to convert

<= div>result =3D s.to_a.collect { |x| alpha_table[x] }

On Wed, May 23, 2012 at 7:22 PM, Rich McMullen <= lists@ruby-forum.com> wrote:

I am working through the Ruby Quiz website a= nd I am already stuck on
number 1 - Solitaire Cypher.

I have a string, let's say "RUBYC ODEIS THEBE STXXX". =C2=A0I= need to convert
each letter to its corresponding number (i.e., A=3D1, B=3D2, etc.).

I had hoped I could use gsub with a regexp like this:

coded_text =3D text.gsub(/[A-Z/,[1-26])

but that doesn't work. =C2=A0Any ideas?

--
Posted via http://= www.ruby-forum.com/.

Regards,

--
Duong Quang Ha (H=C3=A0 Quang D=C6=B0=C6=A1ng in Vietnamese)<= div>blog.haqduong.co= m
--e89a8ff1cc407ecdb804c0b36386--