Prev: Manipulate jitter
Next: ** DECEMBER DISCOUNT: A WorkLife FrameWork....
From: Szabolcs Horvát on 5 Dec 2009 05:34
On 2009.12.04. 10:32, Jezzybear wrote:
> I am trying to create a function myflat[list] to mimic the behavior of
> Mathematica's Flatten[]
> function.Example:
> In[1]:= myflat[{{{a}}, {b, c}, {d}}]
> Out[1]= {a, b, c, d}
> In[2]:= myflat[{{}, 1, {{2}}}]
> Out[2]= {1, 2}
> However in writing this function I want to use only Mathematica's
> pattern matching features, the functions
> First[], Rest[], Prepend[], ListQ[]. I am trying to do this using some
> subfunctions like creating one called myjoin
>
>

How about something like

flatten[list_List] := list //. {s___, {i___}, e___} :> {s, i, e}

flatten[{{1, 2}, {3, {4, 5}}}]

From: Norbert Marxer on 5 Dec 2009 05:38
On Dec 4, 10:32 am, Jezzybear <jezzybea...(a)hotmail.co.uk> wrote:
> I am trying to create a function myflat[list] to mimic the behavior of
> Mathematica's Flatten[]
> function.Example:
> In[1]:= myflat[{{{a}}, {b, c}, {d}}]
> Out[1]= {a, b, c, d}
> In[2]:= myflat[{{}, 1, {{2}}}]
> Out[2]= {1, 2}
> However in writing this function I want to use only Mathematica's
> pattern matching features, the functions
> First[], Rest[], Prepend[], ListQ[]. I am trying to do this using some
> subfunctions like creating one called myjoin

Hello

You mean pattern matching like:

myflat[x_] := {x //. List -> Sequence}

Best Regards
Norbert Marxer


First  |  Prev  | 
Pages: 1 2
Prev: Manipulate jitter
Next: ** DECEMBER DISCOUNT: A WorkLife FrameWork....