Read
http://code.jsoftware.com/wiki/Vocabulary/com#Defining_a_Modifier
all the way to the end. It discusses most of these questions. If more
needs to be said, either add it to the Wiki yourself or ask further
questions in this Forum and I will add to the Wiki.
Henry Rich
On 11/4/2016 11:26 PM, Xiao-Yong Jin wrote:
Is there any document about this behavior in the wiki or the online
help? I had never encountered this issue, for I had never reused
public names for private definitions, until I was bitten by this.
Can someone put a simple explanation with examples in the dictionary?
Such peculiar behavior of name resolution is important to document.
On Nov 4, 2016, at 8:40 AM, 'Pascal Jasmin' via Programming
<[email protected]> wrote:
to pass by value/workaround,
g f. a 5
5
________________________________
From: Henry Rich <[email protected]>
To: [email protected]
Sent: Friday, November 4, 2016 7:40 AM
Subject: Re: [Jprogramming] stack error or private/public name collision
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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