From: sto.mar@...
Date: 2013-02-24T19:31:57+09:00
Subject: Re: Confusion with `nil` value being produced by IRB in case of Array#size manipulation.

Arup / Love U / Xavier:

Offending list members will not help you at all.
Instead, you should go away and learn reading (take your time).
The come back and read this:


= Array.[]

(from ruby site)

[...]

Element Reference---Returns the element at index, or returns a
subarray starting at start and continuing for length
elements, or returns a subarray specified by range. Negative indices
count backward from the end of the array (-1 is the last element).
*Returns nil if the index (or starting index) are out of range.*

----------

= Array.[]=

(from ruby site)

[...]

Element Assignment---Sets the element at index, or replaces a
subarray starting at start and continuing for length
elements, or replaces a subarray specified by range.
*If indices are greater than the current capacity of the array, the 
array grows automatically.*

[...]

   a = Array.new
   a[4] = "4";                 #=> [nil, nil, nil, nil, "4"]


-- 
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