From: Harry Kakueki <list.push@...>
Date: 2013-07-18T12:49:24+09:00
Subject: Re: Get part of matrix

--047d7b6d7d3a89460504e1c118a0
Content-Type: text/plain; charset=ISO-8859-1

>
>
>
>
Does your matrix always have these values in these locations?
If so, maybe you do not need a matrix.



 def get_around(t)
  k = [-11,-10,-9,-1,1,9,10,11]
  k.map{|z| t+z}.select{|f| (t%10-f%10).abs<2 && f>=10 && f<=99}
end

p get_around(54) #> [43, 44, 45, 53, 55, 63, 64, 65]
p get_around(40) #> [30, 31, 41, 50, 51]


I have not verified the output for every case. You can do that if you are
interested in this approach.


Harry

--047d7b6d7d3a89460504e1c118a0
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex">=A0 <br><div class=3D""><div =
class=3D"h5">
<br></div></div></blockquote><div><br></div><div>Does your matrix always ha=
ve these values in these locations?<br></div><div>If so, maybe you do not n=
eed a matrix.<br><br><br><br>=A0def get_around(t)<br>=A0 k =3D [-11,-10,-9,=
-1,1,9,10,11]<br>
=A0 k.map{|z| t+z}.select{|f| (t%10-f%10).abs&lt;2 &amp;&amp; f&gt;=3D10 &a=
mp;&amp; f&lt;=3D99}<br>end<br><br>p get_around(54) #&gt; [43, 44, 45, 53, =
55, 63, 64, 65]<br>p get_around(40) #&gt; [30, 31, 41, 50, 51]<br><br><br><=
/div>
<div>I have not verified the output for every case. You can do that if you =
are interested in this approach.<br><br><br></div><div>Harry<br><br><br></d=
iv><div><br><br></div></div><br></div></div>

--047d7b6d7d3a89460504e1c118a0--