MESSAGE
| DATE | 2016-02-15 |
| FROM | Ruben Safir
|
| SUBJECT | Subject: [Learn] why do I need this
|
From learn-bounces-at-nylxs.com Mon Feb 22 10:58:23 2016
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To: Christopher League
From: Ruben Safir
Message-ID: <56C17CE4.3040904-at-mrbrklyn.com>
Date: Mon, 15 Feb 2016 02:23:16 -0500
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Subject: [Learn] why do I need this
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package pico;
import java.util.ArrayList;
public class TokenListSource implements TokenSource {
ArrayList list;
int nextIndex = 0;
public TokenListSource(ArrayList list) {
this.list = list;
}
-at-Override
public Token nextToken() {
if(nextIndex < list.size()) {
return list.get(nextIndex++);
}
else {
return new Token(Token.Type.EOF);
}
}
}
If all I'm doing is creating an interface that walks through a linked
list? then why do I need all this useless complexity. Java already has
a library that does that.
We are not creating the list. We are not abstracting the list as a new
data type or implementing it within a new data type, Java has NO
templates, or we are not using any templates here, so we are not making
this an usable interface that serves multiple types... We are adding
NOTHING with this other than to confuse the student and creating useless
overhead.
If I am wrong, please explain.
Ruben
--
So many immigrant groups have swept through our town
that Brooklyn, like Atlantis, reaches mythological
proportions in the mind of the world - RI Safir 1998
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DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
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but incompatible with living as a free human being. -RI Safir 2013
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