Well, doesn't Raul's proposal suit you? I think it does.
Anyway, it might also be worth observing (T/bird might
throw in extra lines):
#:3 14
0 0 1 1
1 1 1 0
and even for some list rather than just a pair of numbers:
#:3 14 27 93
0 0 0 0 0 1 1
0 0 0 1 1 1 0
0 0 1 1 0 1 1
1 0 1 1 1 0 1
The right-adjustment is done for you.
You can do boolean arithmetic with these in various ways:
+./#:3 14 27 93 NB. eg OR/ each bit position
1 0 1 1 1 1 1
#.+./#:3 14 27 93
95
+./&.:#:3 14 27 93
95
23 b./3 14 27 93
95
Any use?
Mike
On 20/01/2015 14:05, Jon Hough wrote:
I probably didn't explain very well (I think Also I copy pasted the wrong code
to boot). In my original example, with 3 and 14,
3 is represented in binary as 1 1 (note any leading zeros are gone)
while 14 is represented as
1 1 1 0
If I want to pad binary represented 3 to be the same as the length of binary
represented 14, I would want
0 0 1 1
And so I would hope that
(#: 3) ,: (#: 14)
would give
0 0 1 1
1 1 1 0
(i.e. prepended zeros)
But ,: postpends the padding zeros
i.e.
(#: 3) ,: (#: 14)
actually gives
1 1 0 0
1 1 1 0
So I am wondering what a nice verb is that does the prepending case.
From: [email protected]
Date: Tue, 20 Jan 2015 08:58:42 -0500
To: [email protected]
Subject: Re: [Jprogramming] Using ,: to prepend bits
I am not quite sure what you are asking.
That said, observe:
f,:g
1 1 0 0
1 1 1 0
f,:&.(|."1) g
0 0 1 1
1 1 1 0
Thanks,
--
Raul
On Tue, Jan 20, 2015 at 8:54 AM, Jon Hough <[email protected]> wrote:
This is a little problem I'm having.
Let
f =: #: 3
g =: #: 14
If I do f ,: g
I get
1 0 0 0
1 1 1 0
Here the shorter number , f, has a zero post-pended to match the shape of g.
I would like to find an equivalent verb that prepends the zero.
i.e. , in the case of the above f and g
f some_verb g
gives
0 1 0 0
1 1 1 0
Any help appreciated.
Jon
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