From: Trans <transfire@...>
Date: 2008-04-24T23:28:41+09:00
Subject: Re: Hash keys



On Apr 24, 9:11 am, Tim Wolak <two...@sktydev.com> wrote:
> Morning,
>
> I am working on some code to gather accounts and their balances from a text
> file and have a question about adding that data to a hash.  While checking
> to see if the account number is a key in the existing  hash using
> has_key?(key), canšt I use the variable that has the account number in it or
> do I have to use the actual account number? When I run my code to check it I
> get undefined method `has_key?' for nil:NilClass.  I ran a test using just
> the account number in irb and it works but I would think you could use a
> variable to iterate of my list of account numbers....  Thanks in advance
>
> class Info
>   attr_reader :acct, :money
>
>   def initialize(filename)
>     @acct = File.new(filename, "r")
>   end
>     f = Info.new("Balances20080415.txt")
>       act = f.acct
>         act.each do |list|
>           #covert me to a string
>         futbal = list.to_s
>         #Pull accounts
>         office = futbal[21..23]
>         if office == "RPT"
>           next
>         else
>           acctnum = futbal[24..28]
>           lv = futbal[217..230]
>           lvind = futbal[215..215]
>           lvadd = lvind+lv
>           lvadd.to_f/100
>         end
>           #if Negitave vlaues
>             if lvind == "-"
>               lvnegfloat = lv.to_f/100
>               #print acctnum," ",lvind, lvnegfloat, "\n"
>               #puts lvadd
>             sktylist = Hash.new("")
>               #if(sktylist.has_key?(23))
>                # sktylist = { acctnum => lvind,lvnegfloat }
>
>               sktylist[acctnum] = lvind,lvnegfloat
>               sktylist.each { |key, value| puts "#{key} equals #{value}" }
>               #else Positive Values
>
>             elsif sktylist.has_key?('acctnum')
>                     puts "found #{key}second key"
>                 #lvposflt = lv.to_f/100
>
>                 #print acctnum, " ", lvposflt, "\n"
>               end
>             end
>
> end

Your if clauses looked messed up. The no method error doesn't have
anything to do with the key of has_key. You actually have no hash to
speak of.

T.