From: Michael Guterl <mguterl@...>
Date: 2007-02-28T11:17:05+09:00
Subject: Re: is there something method in ruby like python's reduce()?

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On 2/27/07, lnes <huangliang2211@gmail.com> wrote:
>
> there is python's build-in function reduce()'s definition
>
> =====================================================================
> reduce(    function, sequence[, initializer])
>     Apply function of two arguments cumulatively to the items of
> sequence, from left to right, so as to reduce the sequence to a single
> value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates
> ((((1+2)+3)+4)+5). The left argument, x, is the accumulated value and
> the right argument, y, is the update value from the sequence. If the
> optional initializer is present, it is placed before the items of the
> sequence in the calculation, and serves as a default when the sequence
> is empty. If initializer is not given and sequence contains only one
> item, the first item is returned.
> =====================================================================


ri Enumerable#inject

thanks.
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

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