From: Gergely Kontra <kgergely@...>
Date: 2004-05-04T21:55:36+09:00
Subject: Re: model for my problem (network simulator)

On 0504, Robert Klemme wrote:
> Nope, that's not the same:
> irb(main):001:0> h=Hash.new {[]}
> irb(main):002:0> h[1]
> irb(main):003:0> h
> => {}
> irb(main):004:0> h=Hash.new {|h,k| h[k]=[]}
> irb(main):005:0> h[1]
> irb(main):006:0> h
> => {1=>[]}
> Your solution makes the idiom "h[key] << something" unusable since all
> those arrays never make it into the hash.

Oh, yes, I run into the problem, and this is the weird case, where
h[key] << something and h[key] <<= something is different...

Gergo

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