From: Tobias Reif <tobiasreif@...>
Date: 2002-06-05T17:20:42+09:00
Subject: Re: When should actually freeze work ?

Evan Martin wrote:


> When is it not true?


irb(main):001:0> a=[1,2,3]
[1, 2, 3]
irb(main):002:0> b=a+[4,5]
[1, 2, 3, 4, 5]
irb(main):003:0> b
[1, 2, 3, 4, 5]
irb(main):004:0> a
[1, 2, 3]
irb(main):005:0> a[0]=100
100
irb(main):006:0> a
[100, 2, 3]
# []= is bang (which is obvious as it has the "=")
irb(main):009:0> a.delete 100
100
irb(main):010:0> a
[2, 3]
# delete was bang, without a bang ("!")
irb(main):011:0> d='foo'
"foo"
irb(main):012:0> d.delete 'o'
"f"
irb(main):013:0> d
"foo"
# here, delete was not bang,
#  although it was for the array
#  (or did I err somewhere?)

Most explainable, some counter-intuitive.

Tobi


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