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Message from discussion Declaring return type of a function
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rugilbert17  
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 More options Mar 15 2012, 4:58 pm
Newsgroups: comp.lang.lisp
From: rugilbert17 <rugilber...@zedmail.qux>
Date: Thu, 15 Mar 2012 16:58:28 -0400
Local: Thurs, Mar 15 2012 4:58 pm
Subject: Re: Declaring return type of a function
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On 15/03/2012 4:44 PM, Espen Vestre wrote:

> Jack<jack.moll...@gmail.com>  writes:

>> I have a function that returns a list of integers and I want to apply
>> the * operator to that list.  Once the list gets beyond a certain
>> size, I get a floating point error.  How do I tell CCL that it's okay
>> to use bignums for this calculation?

> Hi Jack!

> Are you sure you get a "floating point error"? From your description, it
> sounds like you apply * to a list that is longer than the maximal number
> of arguments to * that CCL can take.

> The standard solution to this (i.e. whenever you have a list of numbers
> that may be arbitrary long and want to apply * or other similar
> functions to it) is to use REDUCE instead of APPLY:

Clojure, of course, doesn't have this problem.

user=> (apply + (range 1000000))
499999500000

user=> (reduce + (range 1000000))
499999500000


 
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