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From: blmblm@myrealbox.com <blmblm.myrealbox@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: StringBuilder Difficulties
Date: 6 Jul 2011 16:55:41 GMT
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In article <68v61753v8gru9ugkpjmllusua9nvei9si@4ax.com>,
Gene Wirchenko  <genew@ocis.net> wrote:
> On 5 Jul 2011 19:09:46 GMT, blmblm@myrealbox.com
> <blmblm.myrealbox@gmail.com> wrote:
> 
> >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,
> 
>      It was the latter.

Well, why didn't you *say* so ....  <shrug>, sort of a :-)

> >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.)
> 
>      Well, I only need one.  That code will get tossed shortly.

Yes.  But you did ask ....

[snip]

> >>      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>
> 
>      In my experience, it is a common pattern.  After the beginner
> level, there are few tutorials and yet, one does not know enough to
> easily blow away the difficulties.

Maybe you could start a new thread asking for suggestions on what
to read -- I don't have any myself, but someone probably does.

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