From: William Rutiser <wruyahoo05@...>
Date: 2011-01-13T23:11:30+09:00
Subject: Re: What is the difference between inject and reduce methods

Rick DeNatale wrote:
> On Thu, Jan 13, 2011 at 6:30 AM, Josh Cheek <josh.cheek@gmail.com> wrote:
>
>   
>> They are the same, I think the names are just to make people from different
>> languages feel at home. I think "inject" is from Smalltalk, and "reduce" is
>> from Common Lisp, and IIRC "fold" is from Scheme and Haskell.
>>
>> Interestingly, at the last RubyConf, Aaron Patterson and Rein Henrichs were
>> giving their presentations simultaneously, in different rooms, and both of
>> them criticized the use of this method :P
>>
>>     
>
> http://talklikeaduck.denhaven2.com/2010/11/26/how-arlo-got-injected-into-ruby
>
>   
Note that Iverson's notation in "A Programming Language"(Wiley, 1962) 
contained "reduction" operations to extend an operation such as 
multiplication over all components of a vector or matrix. APL 
programmers commonly pronounce an expression like "+/v" as "plus reduce v".

Thanks for the Alice's Restaurant connection.

-- Bill