By all means, post questions here.
And I think you will like J for C programmers (click on JfC at top of
vocabulary page), here is a sample from Chapter 2 Culture Shock:
Here's an example. Figure out what the following code does:
int i, j, maxcol = 0;
float maxval = x[0][0];
for(i = 0;i<=xsize0;++i) {
for(j = 0;j<=xsize1;++j) {
if(x[i][j] > maxval) {
maxval = x[i][j];
maxcol = j;
}
}
}
Not too hard. When the code finishes, maxval is the largest element in
the array x, and maxcol is the column number it was in. As it happens,
all I wanted was the column number, but there was no way for you to know
that.
The same code in J:
maxcol =. (i. >./) >./ x
With some practice, you will learn to read this code just as easily as
you read the C. You will recognize the / as an indicator of a loop that
accumulates a result, and the i. as an indicator of a search. The =.
and =: tokens indicate assignment.
What happened to the if statement?
It's built into the >. primitive. Just as most loops are hidden inside
primitives, so are most conditionals. The functions you write can also
contain built-in conditionals.
What's the statement delimiter?
There isn't one. Statements are exactly one line long.
I've looked at some J code. Every other character is a period or a
colon. I've got spots before my eyes. How can anybody read this stuff?
. . .
On 11/18/2011 3:45 PM, Raul Miller wrote:
> If you cannot find the right reference material, then just post questions
> here.
>
> We have a "J for C Programmers" book, but we do not have a "J for K
> Programmers". And in some ways, J is more complicated to use than K. (K
> tends to be simpler for 1 dimensional data and for tree structures.)
>
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