From: KONTRA Gergely <kgergely@...>
Date: 2003-04-15T02:51:49+09:00
Subject: [Q] Array default values, << and <<=

Hi!

I've found a nice solution to have arrays and hashes a nice default
value, but I'm now confused.

Now, I use ruby 1.8

irb(main):004:0> b=Hash.new([])
=> {}
irb(main):005:0> b[1] << 1
=> [1]
irb(main):006:0> b # Where is the one?
=> {}
irb(main):007:0> b[1] <<= 1
=> [1, 1]

So my confusion:
rb(main):001:0> a=[1,2]
=> [1, 2]
irb(main):002:0> a << 3
=> [1, 2, 3]
irb(main):003:0> a
=> [1, 2, 3]

So what << and <<= exactly do?
Gergo
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