From: Charles Steinman <acharlieblue@...>
Date: 2005-08-02T05:16:04+09:00
Subject: Re: array in array, like include?


Charles Steinman wrote:
> Joe Cheng wrote:
> > Ben wrote:
> >
> > >Is there a function to checking to see if the elements of one array
> > >exist in another?
> > >
> > >a = [1,2,3,4,5]
> > >b = [1,4]
> > >
> > >a.include?(b) will only work if b is a string. I'd like to get a
> > >true/false if b exists in a.
> > >
> > >
> > How about:
> > (a & b).length == b.length
>
> That should be
>
> ==code==
> (a & B).length != 0
> ==endcode==
>
> Because & gives an array of the common members. So if they have no
> common members, it will return a zero-length array, and a
> nonzero-length array otherwise.

Immediately realized that I completely misread the requirements. Sorry
for the incorrect correction. D'oh.