From: Bertram Scharpf <lists@...>
Date: 2009-02-13T21:51:40+09:00
Subject: Re: How to retrive first 10 items from hash in ruby?

Hi,

Am Freitag, 13. Feb 2009, 21:08:19 +0900 schrieb Dave Baldwin:
>
> On 13 Feb 2009, at 11:04, Vikas Gholap wrote:
>
>> I want to retrieve first 10 items(key value pairs) from given hash{}
>>
>> hashTable.sort {|a,b| -1*(a[1]<=>b[1])}
>
> You need to save the results.
> ary = hashTable.sort {|a,b| -1*(a[1]<=>b[1])}
>
> ary[0, 10] will return an array of the first 10 entries
>
> ary[0, 10].each {|e| puts  "Key: #{e[0} ==> #{[e[1]}"

As ary is only of temporary use, you don't need to create another
array ary[0,10]. I suggest:

  10.times { puts "Key: %s ==> %s" % e.shift }
  e.clear  # optional

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de