[REBOL] Re: On list! inconsistency [was Re: WYSIWYG programming]
From: rishi:picostar at: 2-Nov-2000 21:30
Previously, you (Ladislav Mecir) wrote:
> Hi,
>
> I would like to say thank you to Rishi for his reply, because otherwise I
> would have no chance to see Joel's reply. As my thanks take this:
>
> insert-item: :insert
> insert: func[list [series!] item [any-type!]] [insert-item list item]
>
Hi Ladislav. I have tried to use insert the way you mentioned, but for some reason, this
does not work. I get the following error:
Script: "Queue" (17-Oct-2000)
** Script Error: insert has no value.
** Where: insert-it: :insert
insert: func [item [any-type!]]
The interesting thing is that the method above works for any other function I have tried
(such as remove)...but not insert. It seems that you cannot over-ride insert. I am have
included my queue file with the modified insert function the way you have described.
Anyone know why this is? Is it a bug in rebol or am I doing something wrong?
REBOL [
Title: "Queue"
Author: "Rishi Oswal"
Email: [rishio--mail--com]
Date: 17-Oct-2000
File: %queue.r
]
q: make object! [
list: make block! []
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; code in here does not work
insert-it: :insert
insert: func[item [any-type!]] [insert-it list item]
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; this is my code and worked fine
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; must comment out previous insert
functions
; insert-item: func [item][insert list item]
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
remove-item: func [/local item][
item: last list
remove back tail list
return item
]
peek: does [return last list]
size?: does [return length? list]
is-empty?: does [return empty? list]
reset: does [clear list]
print-it: func [
{prints the list. The first item in list is first item entered in list}
/local temp-list
][
temp-list: copy list
print [head reverse temp-list]
]
get: func [
{returns the queue as a list with the first item being the first item inserted}
/local temp-list
][
temp-list: copy list
return copy head reverse temp-list
]
set: func [
{replace current queue with a new one}
queue [block!] {block of values with first value being first item insert in list}
][
list: copy head reverse queue
]
]
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; TEST CODE
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; if using my code, please change insert
to insert-item
;comment { all queue functions
print ["begin all queue functions..." newline]
print [{q/insert ["1" 2 3 4.0]} newline ]
q/insert "1"
print type? q/peek
q/insert 2
q/insert 3
q/insert 4.0
print type? first q/list
q/print-it
print ["q/peek" q/peek]
print ["q/is-empty?" q/is-empty?]
print "q/remove-item 1 2 3"
q/remove-item q/remove-item q/remove-item
q/print-it
print "q/reset"
q/reset
q/print-it
q/insert 20
q/insert 30
q/insert 40
print "current queue: " q/print-it
print ["getting list..."]
temp: q/get
print temp
print "setting queue..."
q/set temp
q/print-it
print ["internal representation: " q/list]
print [newline "...end all queue functions"]
;}
