From: Pieter Mans <tybriel@...>
Date: 2007-07-12T06:51:18+09:00
Subject: Re: Accessing a specific index in a nested array

Florian Gross wrote:
>> For example, this works:
>> irb> array[2]
>> => [2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
>>
>> But this doesn't seem to:
>> irb> array[2[2]]
>> => [2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
>>
>> I'm pretty sure I'm just getting the syntax wrong.
> 
> Yup, you're calling [] on the number 2. You want array[2][2].

Thanks! That worked nicely. I'm getting a weird problem when setting 
values tho. When I try to set the value of an item in a nested array, it 
sets the value in all the other nested arrays too:

irb> test = Map.new(5,5)
=> #<Map:0x2dfd7dc @coords=[["#", "#", "#", "#", "#"], ["#", "#", "#", 
"#", "#"], ["#", "#", "#", "#", "#"], ["#", "#", "#", "#", "#"], ["#"
, "#", "#", "#", "#"]]>
irb> test.coords[1][1] = 0
=> 0
irb> test.coords
=> [["#", 0, "#", "#", "#"], ["#", 0, "#", "#", "#"], ["#", 0, "#", "#", 
"#"], ["#", 0, "#", "#", "#"], ["#", 0, "#", "#", "#"]]

Any idea what I'm doing wrong?


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