From: Paul Rubin <no.email@nospam.invalid>
To: help-gnu-emacs@gnu.org
Subject: Re: How to cast an imperative loop into a readable recursive function ?
Date: Thu, 02 Dec 2010 18:17:20 -0800 [thread overview]
Message-ID: <7xmxontxan.fsf@ruckus.brouhaha.com> (raw)
In-Reply-To: ffc3587e-3cb3-41f6-9b2f-80a22d5095d1@e20g2000vbn.googlegroups.com
Katalin Sinkov <lispstylist@gmail.com> writes:
> How to cast an imperative loop into a readable recursive function ?
> What questions to ask to guide thinking to it ?
The functional-programming answer is that you rarely need explicit
recursion. You can instead usually use higher-order functions like map
and reduce, that are defined in terms of recursion.
Maybe you want to read SICP, if you haven't done so already?
> Here is the concrete problem.
> which is to find the nth character T_n in a string with erratic index
> reset and length of substring given. ie
I'm sorry, I couldn't understand the problem description.
next prev parent reply other threads:[~2010-12-03 2:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-03 1:50 How to cast an imperative loop into a readable recursive function ? Katalin Sinkov
2010-12-03 2:17 ` Paul Rubin [this message]
[not found] ` <8a5ef1e1-aab3-47bd-80e3-081f8dc65b0e@c39g2000yqi.googlegroups.com>
[not found] ` <84a24d31-6379-4b81-ac65-b0d8642ab7da@37g2000prx.googlegroups.com>
2010-12-03 3:30 ` Paul Rubin
[not found] ` <0c1c00c1-61ef-42be-a2d3-db1ff31035e8@29g2000yqq.googlegroups.com>
2010-12-03 7:29 ` Paul Rubin
2010-12-03 9:44 ` Tim Bradshaw
2010-12-03 2:48 ` RG
2010-12-03 3:12 ` Katalin Sinkov
[not found] ` <7xk4jrmtmg.fsf@ruckus.brouhaha.com>
2010-12-03 3:22 ` Katalin Sinkov
[not found] ` <87ipzbpgft.fsf@kuiper.lan.informatimago.com>
2010-12-03 7:37 ` Katalin Sinkov
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