From: huseyin polat <huseyinpolat@...>
Date: 2006-03-03T09:01:39+09:00
Subject: Re: gsub problem

unknown wrote:
> On Fri, 3 Mar 2006, huseyin polat wrote:
> 
>> I have spend over 4 hours for this.. here is the question masters, very
>> simple.
>> str=String.new
>> str="[1,2][2,1][3,1][4,1]"
>>
>> now I want to print this string as
>> [1,2],[2,1],[3,1],[4,1]
>> in other word I want to add comma between those ][ and make them look
>> like ],[
>> I tried gsub with hundred different possibilities but no luck,
> 
> harp:~ > ruby -e'  puts("[1,2][2,1][3,1][4,1]".gsub(%r/\]\[/, "],["))  '
> [1,2],[2,1],[3,1],[4,1]
> 
> 
>> second problem
>> if my the same str has
>> [1,2][2,1][3,1][4,1],
>> and I want to get rid of last comma from the list, I tried chop chomp
>> and all that but it gets ri of alot more than comma at the end. how can
>> I get rid of last comma from the list? from [1,2][2,1][3,1][4,1], to
>> [1,2][2,1][3,1][4,1]
> 
> harp:~ > ruby -e' 
> puts("[1,2][2,1][3,1][4,1],,,".gsub(%r/,+$/,"").gsub(%r/\]\[/, "],[")) 
> '
> [1,2],[2,1],[3,1],[4,1]
> 
> regards.
> 
> -a

thank you, however your first solution didn't make any difference and 
the second got rid of all the commas. thank you anyway.
I have tried your second comments as
str.gsub(%r/,+$/,"").gsub(%r/\]\[/, "],[")
I don't know why.
thank you for trying

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