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From: blmblm@myrealbox.com <blmblm.myrealbox@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: StringBuilder Difficulties
Date: 5 Jul 2011 19:09:46 GMT
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In article <0uk317l9064bd4uaa8m8tckpvks41d7jti@4ax.com>,
Gene Wirchenko  <genew@ocis.net> wrote:
> On 2 Jul 2011 18:33:52 GMT, blmblm@myrealbox.com
> <blmblm.myrealbox@gmail.com> wrote:
> 
> >In article <e9ps07h56utkftkp8fcarm7uhkk5t999le@4ax.com>,
> >Gene Wirchenko  <genew@ocis.net> wrote:
> 
> [snip]
> 
> >>      Oh, I asked about that.  One apparently can not pass a function
> >> pointer parameter as in C.  The ways that were posted involved lookup
> >> every time AFIACS and I judged that it might swamp what I was
> >> measuring (checking if a character were in a set).  So, to my chagrin,
> >> I had to go with cut-and-paste.
> >
> >Without experimenting to find out, of course ....  
> 
>      You are putting the cart before the horse.
> 
>      THE WHOLE POINT of this exercise was experimentation to test the
> speed of the lookup.  Until I got the code I was asking about running,
> of course, I would not know.


Maybe I misunderstood what you meant by "lookup" above --
I understood you to be referring to whatever has to be done
to find the method to be called, as opposed to looking up
individual characters in a list/set.  As far as I can tell,
your benchmark concerns different approaches to the latter,
but assumes that looking up the method (i.e., using the Java
substitute for function pointers) will somehow skew the results
to the point where it shouldn't/can't be used.  (You may actually
be right about that, much as it pains me to say so, because all
that duplicate code is, in my opinion and possibly yours as well,
both aesthetically displeasing and a source of potential trouble.)

> [snip]
> 
> >>      I am pretty much past the intro stage and into the pain stage
> >> where there is not so much help.
> >
> >That people are not willing to offer further help when many of their
> >previous suggestions have been rejected should not be a total surprise.
> ><shrug>
> 
>      My phrase "not so much help" does not refer to this newsgroup.
> You can find texts and Websites on starting with Java.  There is also
> advanced material.  In the middle is a sour spot.  I am at the low end
> of that sour spot.

Ah.  Interesting.  I don't seem to have a clear memory of how I got
from the beginning level to wherever I am now (intermediate?).  I do
remember, though, learning quite a bit from following semi-random
discussions in this newsgroup.  But that was, hm, a decade or so ago,
and it's not clear it would still work.  <shrug>

-- 
B. L. Massingill
ObDisclaimer:  I don't speak for my employers; they return the favor.