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Message: [QUOTE="James French, post: 4634946"] Ah, I understand - thanks. My next question is - is it possible to prevent = this? ________________________________________ From: lasitha [lasitha.ranatunga@gmail.com] Sent: 25 March 2009 10:48 To: ruby-talk ML Subject: Re: appending an array to a frozen array +=3D creates a new array and assigns it to @dependencies. The original array remains frozen but @dependencies no longer refers to it. To illustrate: $: irb 01> a =3D b =3D [1, 2] --> [1, 2] 02> a.freeze --> [1, 2] 03> b.frozen? --> true 04> b +=3D [3, 4] --> [1, 2, 3, 4] 05> a.frozen? --> true solidarity, lasitha= [/QUOTE]