Remove a record if it is duplicate end sum values

Rails
1

I have a hash like so:

list=[
{:cod => “0001”, :name => “name1”, :val => 10},
{:cod => “0001”, :name => “name1”, :val => 12},
{:cod => “0002”, :name => “name2”, :val => 13},
{:cod => “0002”, :name => “name2”, :val => 14},
{:cod => “0002”, :name => “name2”, :val => 14},
{:cod => “0004”, :name => “name4”, :val => 16},
{:cod => “0004”, :name => “name4”, :val => 16},
{:cod => “0004”, :name => “name4”, :val => 17},
{:cod => “0005”, :name => “name5”, :val => 17},
{:cod => “0005”, :name => “name5”, :val => 17},
{:cod => “0005”, :name => “name5”, :val => 17},
{:cod => “0006”, :name => “name6”, :val => 110},
{:cod => “0006”, :name => “name6”, :val => 10},
]

What I would like to learn how to do is how to remove a record if it is
duplicate end sum values :val.

2

On Wed, Aug 1, 2012 at 8:35 PM, Esmerino Jr [email protected]
wrote:

{:cod => “0004”, :name => “name4”, :val => 17},
{:cod => “0005”, :name => “name5”, :val => 17},
{:cod => “0005”, :name => “name5”, :val => 17},
{:cod => “0005”, :name => “name5”, :val => 17},
{:cod => “0006”, :name => “name6”, :val => 110},
{:cod => “0006”, :name => “name6”, :val => 10},
]

What I would like to learn how to do is how to remove a record if it is
duplicate end sum values :val.

try

list.uniq

kind regards -botp

3

Thanks for replay, but this solution only remove the duplication of
values
and sum of values duplication?

Thanks again.

4

On Fri, Aug 3, 2012 at 7:33 PM, Esmerino Jr [email protected]
wrote:

Thanks for replay, but this solution only remove the duplication of values
and sum of values duplication?

pls show what output you really want.

5

Botp, thanks for replay, this is solution:

list.inject(Hash.new(0)) { |hash, el| hash[el[:cod]] += el[:val] ; hash
}

I want it out:

{“0006”=>120, “0005”=>17, “0004”=>33, “0002”=>27, “0001”=>22}

Thanks for replay again.