From: Miles Georgi <azimux@...>
Date: 2008-12-16T10:28:49+09:00
Subject: Re: Struggling with array searches/queries

I'd just map the names in a hash.  Something like

name_hash = {}

then in the loop/if statements:

name_hash[name] ||= 0
name_hash[name] +=1

when you want to print it out

name_hash.each_pair {|name,count| puts "#{key} occurs #{count} times"}

I don't really understand the logic of your code.  I'm not sure what
the find method does, but it looks like your code would increment the
count for everyname encountered so far if the ID is 123.

I think you're experiencing a problem with your algorithm, not your
code.  Your algorithm doesn't seem to make sense to me.

On Mon, Dec 15, 2008 at 3:31 PM, Stuart Clarke
<stuart.clarke1986@gmail.com> wrote:
> I am reading delimited lines of data stored in array eg
>
> 123   name     address      date       product
>
> I perform an array.each and then run an if statement based on the ID
> (123). What I wish to do now is say
>
> if you find ID 123
> read the entries in name and count unique names
>
> eg the entries bob bob mike sue
> Would report 2      bob
>             1      mike
>             1      sue
>
> I was thinking something like this
>
> if id==123
>  namelist.push name
>  counts = Hash.new(0)
>  if namelist.find {|n| (counts[n]) +=1}
>    puts counts + name
>
> Obviously the coding is not correct, but can anyone comment or expand
> further on this?
>
> Many thanks
> --
> Posted via http://www.ruby-forum.com/.
>
>