Grabbing quoted substrings

ruby-talk
1

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

  a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

I want an array like,

  ["x", "y", "z", ..., "mach"]

The methods I've come up with so far are
embarrassingly hideous.

Thanks,

···

--
Bil Kleb
http://

2

Hi,

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

I want an array like,

["x", "y", "z", ..., "mach"]

a.scan(/"([^"]+)"/).flatten

3

Bil Kleb wrote:

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

I want an array like,

["x", "y", "z", ..., "mach"]

The methods I've come up with so far are
embarrassingly hideous.

This should do the trick:

a.scan(/"(.*?)"/).flatten

Tom Werner

4

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

I want an array like,

["x", "y", "z", ..., "mach"]

The methods I've come up with so far are
embarrassingly hideous.

easy:

     harp:~ > cat a.rb
     a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

     variables = eval a

     p variables

     harp:~ > ruby a.rb
     ["x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"]

hard:

   harp:~ > cat a.rb
   a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

   re = %r/
           "([^"\\]*(?:\\.[^"\\]*)*)" # matches balanced double quotes
           >
           '([^'\\]*(?:\\.[^'\\]*)*)' # matches balanced single quotes
         /ox

   variables = a.scan(re).map{|a,b| a || b}

   p variables

   harp:~ > ruby a.rb
   ["x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"]

info:

   http://rubyforge.org/pipermail/bdrg-members/2006-June/000050.html

cheers.

-a

···

On Thu, 21 Dec 2006, Bil Kleb wrote:
--
if you find yourself slandering anybody, first imagine that your mouth is
filled with excrement. it will break you of the habit quickly enough. - the
dalai lama

5

Bil Kleb wrote:

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

  a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

I want an array like,

  ["x", "y", "z", ..., "mach"]

The methods I've come up with so far are
embarrassingly hideous.

Thanks,
--
Bil Kleb
http://

a = 'variables="x", "foo\"bar", "\"\"", "rho", "u", "p/pinf", "mach"'

x = a.scan( /"((?:\\.|.)*?)"/ ).flatten
p x
puts x

--- output -----
["x", "foo\\\"bar", "\\\"\\\"", "rho", "u", "p/pinf", "s", "mach"]
x
foo\"bar
\"\"
rho
u
p/pinf
s
mach

6

Bil Kleb wrote:

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

Thanks everyone!

···

--
Bil Kleb

"I hate open source, you just can't get any support." -Bozo

7

As always, be wary of input to eval. Very wary:

    a = 'variables="x", "y", "z", "rho", "u", "v", ""; puts "blackhat!"; x = "", "w", "p/pinf", "s", "mach"'
    eval a

outputs

    blackhat!

Tom Werner

···

ara.t.howard@noaa.gov wrote:

On Thu, 21 Dec 2006, Bil Kleb wrote:

OK, I give up, what's the elegant method to
grab the quoted substrings in the following,

a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

I want an array like,

["x", "y", "z", ..., "mach"]

The methods I've come up with so far are
embarrassingly hideous.

easy:

    harp:~ > cat a.rb
    a = 'variables="x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"'

    variables = eval a

    p variables

    harp:~ > ruby a.rb
    ["x", "y", "z", "rho", "u", "v", "w", "p/pinf", "s", "mach"]