From: Tobias Reif <tobiasreif@...>
Date: 2002-06-05T17:29:32+09:00
Subject: Re: When should actually freeze work ?

> Evan Martin wrote:
> 
>> When is it not true?


clearer:

irb(main):001:0> ary=[1,2,3]
[1, 2, 3]
irb(main):002:0> str='bamboozle'
"bamboozle"
irb(main):003:0> [ary,str].each do |obj| obj.freeze end
[[1, 2, 3], "bamboozle"]
irb(main):004:0> ary.delete 1
TypeError: can't modify frozen array
         from (irb):4:in `delete'
         from (irb):4
# bang without a "!"
irb(main):005:0> str.delete 'b'
"amoozle"
# non-bang when used on a string
irb(main):006:0> str
"bamboozle"

Tobi


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