I will add that to the list of possible features. It's something I have
had to do several times, and I end up with something like
FMT =: 2 {. (". FMT) , 1 16
which is awkward, as you say.
Henry Rich
On 7/11/2017 4:02 AM, Marshall Lochbaum wrote:
Does this scheme support easily assigning a default value to a variable,
that is, assigning only if the name is currently unused? This is a
common case for me and I'm just now realizing that the "default" option
doesn't really do that.
See https://github.com/mlochbaum/JSound/blob/master/wav.ijs for an
example, where I'm forced to write an awkward line of code to set the
default format to 16-bit 44.1kHz. This seems easy enough to support with
another trailing character on the name, like ^ or ?. So I would write
'FMT? F?' =: 1 16;44100
instead of the current version.
On a side note, Earl Grey is a good language to look at if you are
interested in more sophisticated assignment schemes. I don't know if
much of it is relevant to J, but it's very cool to see what can happen
if you build a language to handle pattern matching from the bottom up.
See http://www.earl-grey.io/doc.html, up to the section on pattern
matching.
Marshall
On Tue, Jul 04, 2017 at 01:40:52AM -0400, HenryRich wrote:
Here is a feature that I have wanted for a long time:
http://code.jsoftware.com/wiki/System/Interpreter/Requests#Expanded_Multiple_Assignment
It attempts to solve the problem of moving verb arguments into
variable-names. Allows defaults and multilevel arguments. I will implement
this within a month or so, so get your comments in ASAP.
Henry Rich
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