array in ruby

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hello list

I have this array, in irb I write @mercados
it puts this

[[#<Mercado id: 1, nombre: "Ibex 35", descripcion: "", simbolo: "^IBEX",
created_at: "2008-08-13 10:22:42", updated_at: "2008-08-13 10:22:42">],
[#<Mercado id: 1, nombre: "Ibex 35", descripcion: "", simbolo: "^IBEX",
created_at: "2008-08-13 10:23:39", updated_at: "2008-08-13 10:23:39">],
[#<Mercado id: 1, nombre: "Ibex 35", descripcion: "", simbolo: "^IBEX",
created_at: "2008-08-13 10:23:55", updated_at: "2008-08-13 10:23:55">],
[#<Mercado id: 2, nombre: "Nasdaq", descripcion: "", simbolo: "",
created_at: "2008-08-13 17:39:27", updated_at: "2008-08-13 17:39:27">]]

if I write @mercados[1] it puts

#<Mercado id: 1, nombre: "Ibex 35", descripcion: "", simbolo: "^IBEX",
created_at: "2008-08-13 10:23:39", updated_at: "2008-08-13 10:23:39">]

I write @mercados[i].id but it is wrong
I want params id, How do it??


thanks
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