Re: Minor errors in the quick tour
Hi Brian,
than you very much for your friendly feedback.
Hopefully fixed in SVN 1663.
Best Regards,
Jürgen
On 3/16/23 12:48 AM, Mr. Brian B.
McGuinness wrote:
These are a few things I noticed while glancing over the
document:
In section 3.1.2, the sequence \a is shown as evaluating to both
NUL and BEL. Checking with quad AV, it appears that \0 will
produce NUL and \a will produce BEL.
In the table in section 3.4.9, the definition of equal has three
circles, which looks wrong.
In section 3.4.12, note that star-dieresis is the power
operator, not the rank operator. For an integer right operand
it repeats the operation the specified number of times. (if the
integer is negative, it applies the inverse operation the number
of times given by the absolute value of the integer). So
1 (○⍣3) X or 1 ({circle}{star-dieresis} 3) X is the
sine of the sine of the sine of X, 1 (○⍣¯3) or 1
({circle}{star-dieresis} {negative}3) X is the arcsine of the
arcsine of the arcsine of X, and so on.
Otherwise, I think that the quick tour is very nice. It has
plenty of good examples to illustrate how things work. I also
like the tables of functions and operators. It can serve as a
nice introduction to APL for beginners.
--- Brian McGuinness
Minor errors in the quick tour
These are a few things I noticed while glancing over the document:
In section 3.1.2, the sequence \a is shown as evaluating to both NUL and BEL.
Checking with quad AV, it appears that \0 will produce NUL and \a will produce
BEL.
In the table in section 3.4.9, the definition of equal has three circles, which
looks wrong.
In section 3.4.12, note that star-dieresis is the power operator, not the rank
operator. For an integer right operand it repeats the operation the specified
number of times. (if the integer is negative, it applies the inverse operation
the number of times given by the absolute value of the integer). So
1 (○⍣3) Xor1 ({circle}{star-dieresis} 3) Xis the sine of the sine
of the sine of X, 1 (○⍣¯3)or1 ({circle}{star-dieresis} {negative}3) X
is the arcsine of the arcsine of the arcsine of X, and so on.
Otherwise, I think that the quick tour is very nice. It has plenty of good
examples to illustrate how things work. I also like the tables of functions
and operators. It can serve as a nice introduction to APL for beginners.
--- Brian McGuinness
