Question

Suppose I have an array of string like following:

str_arr=["10$", "10$ I am a student","10$Good","10$ Nice weekend!"]

I would like to re-organize the array element value in the way that, in each element of the array , if there is(are) white space(s) after 10$ sign, then, combine the 10$ with the following word.

That’s generating a new array like following:

str_arr=["10$", "10$I am a student","10$Good","10$Nice weekend!"]

What I tried to do is like following:

str_arra.map{|elem| 
     # not sure how to do here, 
     #split and check then combine again?
      if elem.size>1
         words=elem.split()
         if words[0]=='10$'
             #not sure how to do here
         end
      elsif elem.size==1
         elem
      end


 }

but not sure how to generate the new array … and the code above seems verbose…

P.S. it is possible that there are multiple white-spaces after 10$, then comes a word

Answer 1

If you only have those cases, the following should do the trick:

["$ abc", "$str"].map {|v, k| v.sub(/\$ +/, '$')}

Here’s an example: http://codepad.org/XHeo7E8B