From: Matthew Kerwin <matthew@...>
Date: 2012-12-20T08:19:14+09:00
Subject: Re: Perl to Ruby: regex captures to assignment.

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On 20 December 2012 09:07, Matthew Kerwin <matthew@kerwin.net.au> wrote:

> As it is, the parser is interpreting the ternary operation as the first
> item in the list, like:
>
>     tmp = frac_str.match(/\//) \
>       ? frac_str.match(/(?:(\S+) )*?(\S+)\/(\S+)/).captures \
>       : 0
>     w, n, d = tmp, frac_str, d
>
> Subsequently puts(tmp) is calling Array#to_s which concatenates the
> elements, so you see "134"
>
>
Sorry for replying to myself.  I just noticed that the Perl code also had
an explicit array,

     : ( 1, $frac_str, 0 )

Those brackety thingies are important, no matter which language you're
using.  ;)

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<div dir=3D"ltr">On 20 December 2012 09:07, Matthew Kerwin <span dir=3D"ltr=
">&lt;<a href=3D"mailto:matthew@kerwin.net.au" target=3D"_blank">matthew@ke=
rwin.net.au</a>&gt;</span> wrote:<br><div class=3D"gmail_extra"><div class=
=3D"gmail_quote">
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex"><div dir=3D"ltr">As it is, the parser is interpreting the =
ternary operation as the first item in the list, like:<div>
<br></div><div>=A0 =A0 tmp =3D=A0frac_str.match(/\//) \<div class=3D"im"><d=
iv>=A0 =A0 =A0 ? frac_str.match(/(?:(\S+) )*?(\S+)\/(\S+)/).captures \</div=
>
<div>=A0 =A0 =A0 : 0</div></div><div>=A0 =A0 w, n, d =3D tmp, frac_str, d<b=
r></div><div><br></div><div>Subsequently puts(tmp) is calling Array#to_s wh=
ich concatenates the elements, so you see &quot;134&quot;</div><div><br></d=
iv></div>
</div></blockquote><div><br></div><div style>Sorry for replying to myself. =
=A0I just noticed that the Perl code also had an explicit array,</div><div =
style><br></div><div style>=A0 =A0=A0<span style=3D"font-family:arial,sans-=
serif;font-size:13px">=A0</span><span style=3D"font-family:arial,sans-serif=
;font-size:13px">: ( 1, $frac_str, 0 )</span></div>
<div style><span style=3D"font-family:arial,sans-serif;font-size:13px"><br>=
</span></div><div style><span style=3D"font-family:arial,sans-serif;font-si=
ze:13px">Those brackety thingies are important, no matter which language yo=
u&#39;re using. =A0;)</span></div>
</div></div></div>

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