Oh, sorry, I misunderstood your question and difficulty.
For something like that, I would use a browser which does not support
javascript. (Firefox with the noscript extension installed,
specifically, though a text only browser like lynx might work).
Using that approach, here's what I got from copy and paste (without
bothering with a text editor to clean it up):
----------------
Consider the sequence of real numbers $a_n$ defined by the starting
value $a_0$ and the recurrence $\displaystyle a_{n+1}=a_n-\frac 1
{a_n}$ for any $n \ge 0$.
For some starting values $a_0$ the sequence will be periodic. For
example, $a_0=\sqrt{\frac 1 2}$ yields the sequence: $\sqrt{\frac 1
2},-\sqrt{\frac 1 2},\sqrt{\frac 1 2}, \dots$
We are interested in the range of such a periodic sequence which is
the difference between the maximum and minimum of the sequence. For
example, the range of the sequence above would be $\sqrt{\frac 1
2}-(-\sqrt{\frac 1 2})=\sqrt{ 2}$.
Let $S(P)$ be the sum of the ranges of all such periodic sequences
with a period not exceeding $P$.
For example, $S(2)=2\sqrt{2} \approx 2.8284$, being the sum of the
ranges of the two sequences starting with $a_0=\sqrt{\frac 1 2}$ and
$a_0=-\sqrt{\frac 1 2}$.
You are given $S(3) \approx 14.6461$ and $S(5) \approx 124.1056$.
Find $S(25)$, rounded to 4 decimal places.
----------------
I hope this helps,
--
Raul
On Sun, Oct 11, 2020 at 11:36 AM 'Michael Day' via General
<[email protected]> wrote:
>
> Thanks for the tip, Raul, but it doesn't fix the problem for me, at
> least with my
> understanding of your remarks.
>
> I assume M/S Wordpad and Notepad are such editors, as you have in mind,
> but I'm
> still not seeing the missing text with either. Pasting into a Word-type
> document,
> actually into a blank Open Office page, shows more of the text, but is
> still not terribly
> useful, since %: 1%2 (as it were in plain J) becomes 12, still leaving
> a lot of hand-editing
> to be done.
>
> Perhaps you could have a look at https://projecteuler.net/problem=729 to
> see how
> it works for you.
>
> Many regards,
>
> Mike
>
> On 11/10/2020 16:04, Raul Miller wrote:
> > In general, for copy and paste problems, nowadays I paste into a plain
> > text editor that does not support unicode, where I also fix any line
> > length errors before copying and pasting into J.
> >
> > Unicode implementations, in their current state, are programming
> > language hostile (more specifically, in the Unicode standard, there's
> > lots of little recommendations about how programming languages
> > implement Unicode which were made in ignorance of the languages).
> >
> > --
> > Raul
> >
> >
> >
> > On Sun, Oct 11, 2020 at 9:10 AM 'Michael Day' via General
> > <[email protected]> wrote:
> >> I wonder - how do other J-users trying to solve Project Euler problems
> >> cope with the
> >> (to me) fairly new display format, which is apparently MathJax?
> >>
> >> Using Windows 10, copy&paste to get the problem statement into my J
> >> edit screen used to be adequate
> >> to get it where I need it as a set of NB. comment lines. I'd nearly
> >> always have to tweak the quoted
> >> text, but it was manageable.
> >>
> >> It's now losing too much information, and it's tedious typing
> >> everything in. I wasted time solving
> >> the relatively easy problem 727 because I'd mis-typed 1 <: ra < rb < rc
> >> <: 100 with <: everywhere.
> >>
> >> Here's a snippet from today's problem, 729, using the old method:
> >> "Consider the sequence of real numbers [LF]
> >> defined by the starting value [LF]
> >> and the recurrence [LF]
> >> [LF]
> >> for any ."
> >>
> >> [I've typed in "[LF]" in this message quote to confirm the gratuitous
> >> line-feeds which appear instead of
> >> marked-up text elements, such as an, a0...]
> >>
> >> It's possible to capture the explicit markup code from the display,
> >> using a widget tagged with
> >> "Show HTML problem content"
> >>
> >> Here's the same paragraph using that view, ie copy&pasted from
> >> problem 729, https://projecteuler.net/minimal=729
> >>
> >> "<p>Consider the sequence of real numbers $a_n$ defined by the starting
> >> value $a_0$ and the recurrence
> >>
> >> $\displaystyle a_{n+1}=a_n-\frac 1 {a_n}$ for any $n \ge 0$.</p>
> >>
> >> <p>"
> >>
> >>
> >> I'd like it to appear in the J script in plain-ish commented text, eg:
> >>
> >> NB. Consider the sequence of real numbers an defined by the starting
> >> value a0 and the recurrence
> >>
> >> NB. a[n+1] =an - 1/an for any n >: 0.
> >>
> >>
> >> SO - I can soldier on and work up a function or two to translate the
> >> data from clipread (in JQt) ,
> >>
> >> but I've never seriously got into html, and suspect I'd be reinventing
> >> the wheel from first principles when
> >>
> >> someone probably knows this stuff backwards and might even have some
> >> suitable code.
> >>
> >>
> >> BTW, Google has thrown up "pandoc", and J has addons/format/publish.
> >> Both are file-based and don't work
> >>
> >> on clipboard data as far as I can see so far.
> >>
> >>
> >> Thanks for any help,
> >>
> >>
> >> Mike
> >>
> >>
> >> PS - I've just checked behaviour on the iPad with J701 - copy&paste on
> >> that kit has been pretty bad for some time;
> >>
> >> it doesn't lose the text, but uses a line feed with every character in
> >> an escape sequence. eg
> >>
> >> "a_{n+1}= a_n " becomes
> >>
> >> "
> >>
> >>
> >> a
> >>
> >> n
> >>
> >> +
> >>
> >> 1
> >>
> >> =
> >>
> >> a
> >>
> >> n
> >>
> >>
> >> [etc]
> >>
> >> "
> >>
> >>
> >>
> >>
> >>
> >> --
> >> This email has been checked for viruses by Avast antivirus software.
> >> https://www.avast.com/antivirus
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> > ----------------------------------------------------------------------
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>
>
> --
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