vim macro until pattern is matched - vim

Question

I have an array of states that no one is going to have to modify often, so I want to remove the white space.
I tried the following keystrokes as there are some whitespace characters between the commas in the array and the endlines:
q a /, ENTER FORWARD v /\n ENTER d
Unfortunately, whomever formatted this neglected to place any whitespace after 'Montana', so when I run the macro 51#a, it breaks after 27 iterations.
How can I have a macro only run a pattern if \s is matched, or better yet, how can I run a macro until it recognizes ); (end of array).
EDIT: Here is an example. Note the two white space characters after all entries except keys MT,NE,NV and NH.
$state_list = array('AL'=>"Alabama",
'AK'=>"Alaska",
'AZ'=>"Arizona",
'AR'=>"Arkansas",
'CA'=>"California",
'CO'=>"Colorado",
'CT'=>"Connecticut",
'DE'=>"Delaware",
'DC'=>"District Of Columbia",
'FL'=>"Florida",
'GA'=>"Georgia",
'HI'=>"Hawaii",
'ID'=>"Idaho",
'IL'=>"Illinois",
'IN'=>"Indiana",
'IA'=>"Iowa",
'KS'=>"Kansas",
'KY'=>"Kentucky",
'LA'=>"Louisiana",
'ME'=>"Maine",
'MD'=>"Maryland",
'MA'=>"Massachusetts",
'MI'=>"Michigan",
'MN'=>"Minnesota",
'MS'=>"Mississippi",
'MO'=>"Missouri",
'MT'=>"Montana",
'NE'=>"Nebraska",
'NV'=>"Nevada",
'NH'=>"New Hampshire",
'NJ'=>"New Jersey",
'NM'=>"New Mexico",
'NY'=>"New York",
'NC'=>"North Carolina",
'ND'=>"North Dakota",
'OH'=>"Ohio",
'OK'=>"Oklahoma",
'OR'=>"Oregon",
'PA'=>"Pennsylvania",
'RI'=>"Rhode Island",
'SC'=>"South Carolina",
'SD'=>"South Dakota",
'TN'=>"Tennessee",
'TX'=>"Texas",
'UT'=>"Utah",
'VT'=>"Vermont",
'VA'=>"Virginia",
'WA'=>"Washington",
'WV'=>"West Virginia",
'WI'=>"Wisconsin",
'WY'=>"Wyoming"
);
To:
$state_list=array('AL'=>"Alabama",'AK'=>"Alaska",'AZ'=>"Arizona",'AR'=>"Arkansas",'CA'=>"California",'CO'=>"Colorado",'CT'=>"Connecticut",'DE'=>"Delaware",'DC'=>"District Of Columbia",'FL'=>"Florida",'GA'=>"Georgia",'HI'=>"Hawaii",'ID'=>"Idaho",'IL'=>"Illinois",'IN'=>"Indiana",'IA'=>"Iowa",'KS'=>"Kansas",'KY'=>"Kentucky",'LA'=>"Louisiana",'ME'=>"Maine",'MD'=>"Maryland",'MA'=>"Massachusetts",'MI'=>"Michigan",'MN'=>"Minnesota",'MS'=>"Mississippi",'MO'=>"Missouri",'MT'=>"Montana",'NE'=>"Nebraska",'NV'=>"Nevada",'NH'=>"New Hampshire",'NJ'=>"New Jersey",'NM'=>"New Mexico",'NY'=>"New York",'NC'=>"North Carolina",'ND'=>"North Dakota",'OH'=>"Ohio",'OK'=>"Oklahoma",'OR'=>"Oregon",'PA'=>"Pennsylvania",'RI'=>"Rhode Island",'SC'=>"South Carolina",'SD'=>"South Dakota",'TN'=>"Tennessee",'TX'=>"Texas",'UT'=>"Utah",'VT'=>"Vermont",'VA'=>"Virginia",'WA'=>"Washington",'WV'=>"West Virginia",'WI'=>"Wisconsin",'WY'=>"Wyoming");
EDIT:
Just googled vim macro until pattern matched, and came across my own question. I have a better example now:
namespace A{
class a{}
class a{}
}
namespace B{
class b{}
class b{}
class b{}
}
Needs to become:
namespace A{
class Aa{}
class Aa{}
}
namespace B{
class Bb{}
class Bb{}
class Bb{}
}
This cannot be solved with the previously accepted answer.

Answer 1

Honestly the easiest answer would be to join the lines.
If you visual select the entire region and just press J (or feed the range to :join) all of the lines will end up on one line. (There may be excess whitespace in-between elements but thats easier to fix then trying to write the macro).
If you then want to remove the excess whitespace you could run
:s/,\s\+/,/g
on the joined line.
Take a look at :h J and :h :join

Answer 2

First of all, you can easily remove all trailing whitespace with one command:
:%s/\s\+$//e
That will work on every line of the file. If you want to do it only on this fragment of code, you can specify different range (instead of %, which is whole file). For example, you can pass line numbers (1 to 51):
:1,51s/\s\+$//e
or first visually select, and then run command removing whitespace (you have to be on the first line starting this sequence):
V/)<CR>:s/\s\+$//e
If you really want to use macro, you can slightly tweak (and simplify) your macro:
qa0f,lDq
and then run it on every line at once by first of all visually selecting all of them (again, start on line you want, I won't put gg here because it might be just part of the file):
V/)<CR>:normal #q
This will play the macro over every selected line, up to the line with ).
I hope it helps :)