From: Corey Haines <coreyhaines@...>
Date: 2008-02-03T08:00:55+09:00
Subject: Re: Strings .each method

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Very cool, Rob!

On Feb 2, 2008 5:21 PM, Rob Biedenharn <Rob@agileconsultingllc.com> wrote:

>
> On Feb 2, 2008, at 5:14 PM, Chris Hickman wrote:
>
> > Corey Haines wrote:
> >> but if you can describe why you want to do it, there might be a
> >> different way
> >
> > It is kind of hard to explain but I have a long string that someone
> > typed into a form which was then saved into a database.  They used
> > made
> > up tags such as "<choose1>, </choose1>, <row>, </row>, <tbl> ..."  I
> > have to translate the string into html and add javascript etc. based
> > on
> > the different tags they wrote.
> >
> > I have it working for everything except one task.  In this one task I
> > want to pass the words between two tags as a value for the javascript.
> > The problem is it is pulling the phrase apart at every space.  I
> > know I
> > can add .each(???) and have it pull everything apart at the ??? but it
> > would involve a lot of adding ??? to this long string.
> >
> > What I am trying to do is add a while loop inside the block that will
> > look ahead at the next substring to see if it is a "</choose1>".  If
> > it
> > is I want it to exit the while loop and go on without throwing away
> > the
> > "</choose1>" tag because it is needed next time through the block.
> >
> > Sorry if that didnt make sense at all.
>
> Perhaps something like this:
>
> irb> require 'enumerator'
> => true
> irb> a = "This is a big list of words"
> => "This is a big list of words"
> irb> (a.split(' ') << nil).each_cons(2) {|word,lookahead| puts "%-10s
> %s"%[word.inspect,lookahead.inspect]}
> "This"     "is"
> "is"       "a"
> "a"        "big"
> "big"      "list"
> "list"     "of"
> "of"       "words"
> "words"    nil
> => nil
>
> Putting the << nil gives the last word something to be spit out of the
> each_cons with.
>
> -Rob
>
> Rob Biedenharn          http://agileconsultingllc.com
> Rob@AgileConsultingLLC.com
>
>
>


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