From: Robert Klemme <shortcutter@...>
Date: 2008-11-18T00:55:44+09:00
Subject: Re: mult dimensional arrays in ruby

2008/11/17 Sijo Kg <sijo@maxxion.com>:
> Hi
>   What I am trying to do below is I have to enter two rows to the table
> contact_address_types like
>
> description(string)   default_item(boolean)   enabled(boolean)
> Home                        f                       t
> Business                    f                       t
>
> Then I tried like
>
> CONTACT_ADDRESS_TYPES = [["Home","f","t"],["Business","f","t"]]
>  def self.up

What is self here?

>    CONTACT_ADDRESS_TYPES.each do |array|
>        ContactAddressType.create(:description => array[0])
>        ContactAddressType.create(:default_item => array[1])
>        ContactAddressType.create(:enabled => array[2])
>    end

You need to use #map! instead of #each if you want to change
CONTACT_ADDRESS_TYPES in place. However, I'd think this is bad design
because you are changing the types of objects in a constant Array. I'd
rather do it differently (see below):

>  end
>
>
>      But this not working Is this the correct way to do this?Please

How about

irb(main):001:0> ContactAddressType = Struct.new :decription,
:default_item, :enabled
=> ContactAddressType
irb(main):002:0> CONTACT_ADDRESS_TYPES = [
irb(main):003:1* ContactAddressType.new("Home", false, true),
irb(main):004:1* ContactAddressType.new("Business", false, true),
irb(main):005:1* ]
=> [#<struct ContactAddressType decription="Home", default_item=false,
enabled=true>, #<struct ContactAddressType decription="Business",
default_item=false, enabled=true>]
irb(main):006:0>

?

Cheers

robert


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