From: Adam Prescott <adam@...>
Date: 2011-06-10T22:40:09+09:00
Subject: [ruby-core:36927] Re: [Ruby 1.9 - Feature #4830] Provide Default Variables for Array#each and other iterators

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On Fri, Jun 10, 2011 at 2:32 PM, Adam Prescott <adam@aprescott.com> wrote:

> I think the ${1,2,3,...} variables match the gsub(regex, "a $1 replacement
> $2 here $3").
>

Sorry, that wasn't really clear, and the latter code should be \\1 not $1. I
shouldn't rush!

What I mean by this is that the variables have a clear association to
capturing group numbers. Experience with regular expressions in Ruby and
elsewhere will suggest to you what $1 will get replaced to in the block-form
of gsub. The general implicit block argument $item does not, at least to me.

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<div class=3D"gmail_quote">On Fri, Jun 10, 2011 at 2:32 PM, Adam Prescott <=
span dir=3D"ltr">&lt;<a href=3D"mailto:adam@aprescott.com">adam@aprescott.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

<div>I think the ${1,2,3,...} variables match the gsub(regex, &quot;a $1 re=
placement $2 here $3&quot;).</div><div></div></blockquote></div><br><div>So=
rry, that wasn&#39;t really clear, and the latter code should be \\1 not $1=
. I shouldn&#39;t rush!</div>

<div><br></div><div>What I mean by this is that the variables have a clear =
association to capturing group numbers. Experience with regular expressions=
 in Ruby and elsewhere will suggest to you what $1 will get replaced to in =
the block-form of gsub. The general implicit block argument $item does not,=
 at least to me.</div>


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