Consider:
g =: ]
a=:1 :0
g=.+:
u y
)
g 5
5
g a 5
10
inside a, u is defined as g, because verbs are passed by name.
There is an exception: u v m n x y are always replaced by their values
when they are taken from the execution queue.
Henry Rich
On 11/4/2016 5:51 AM, 'Jon Hough' via Programming wrote:
I'm not sure what the rule is, but if you do:
g =: ]
a =: 1 : 0
h =. u
g =. +:
h y
)
g a 1
NB. what is g?
g
it shows g as ],
i.e Global g doesn't get reassigned.
Also,
g =: ]
a =: 1 : 0
g =. u
g y
)
^ a 1
NB. what is g?
g
shows ],
so global g doesn't get reassigned here either. But the g in the line "g y" is
^ , i.e. a ignores the locally defined g.
Sorry that's not helpful. The dictionary entry for explicit definitions [1],
doesn't seem to have much to say about it.
Interestingly, if you erase g inside the conjunction ([2]), and then assign
local g, you will still get a stack error:
g =: ]
a =: 1 : 0
(4!:55) <'g'
g =. u
g y
)
g a 1
[1] http://www.jsoftware.com/help/dictionary/d310n.htm
[2] http://www.jsoftware.com/help/dictionary/dx004.htm
--------------------------------------------
On Fri, 11/4/16, Xiao-Yong Jin <[email protected]> wrote:
Subject: [Jprogramming] stack error or private/public name collision
To: [email protected]
Date: Friday, November 4, 2016, 1:52 PM
Is the following a bug?
g=:]
a=:1 :0
g=.u
g y
)
g a 1
|stack error: g
| g y
a=:1 :0
f=.u
f y
)
g a 1
1
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