From: "Jakub Pavlík jn." <severus@...>
Date: 2009-02-13T21:31:08+09:00
Subject: Re: How to retrive first 10 items from hash in ruby?

> Hello All, I am new to programming, i have little problem with hash.
> 
> I want to retrieve first 10 items(key value pairs) from given hash{}
> 
> hashTable = {"a" => 1, "b" => 5, "c" => 2, "d" => 6, "e" => 4, "f" => 7,
> "g" => 9, "h" => 5, "i" => 1, "j" => 8, "k" => 9, "l" => 3, "m" => 7,
> "n" => 10, "o" => 12}
> 
> #sort hashTable on value by descending order
> hashTable.sort {|a,b| -1*(a[1]<=>b[1])}
> 
> #now I want 10 items from sorted hashTable
> 
> I wrote some thing like
> ---------------------------------
> hashTable.each do |key,value|
>        puts"Key: #{key} ==> #{value}"
>        # I want only first 10
> end
> ------------------------------------
> it prints all elements but i want only 10 items. please help.
> 
> Thanks,
> Vikas
> -- 
> Posted via http://www.ruby-forum.com/.

i = 0
hashTable.each_pair {|key,value|
  break if i >= 10
  puts "Key: ..."
  i+=1
}

Is this what you need?

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