Array scope of an index

[metro]

A lot of head scratching going on here!

For the life of me I could not work out why an array would not print when looping through within a Sub

my index was "z", so changed it to "q" and everything worked

then I found that "z" was declared as GLOBAL, so I changed the GLOBAL "z" to GLOBAL "q" and the array would not print again

is this a known issue, and I'm just showing my ignorance again?

EDIT changed Example code  below to demonstrate ...just remove the rem before global to see the effect

' GLOBAL q
Call Doit

WAIT

SUB Doit
call LoadList$
call Add2ListView
END SUB

SUB Add2ListView

for q= 1 to 3
print Rowdata$(q)
next
END SUB


SUB LoadList$
Rowdata$(1) =" A2M,AAC,ABC,AGI,AGL,AGL,AHG,ALG,ALL,ALQ,ALU,AMC,ANN,ANZ,AOG,APA,APC,APT,APX,AST,ASX,XJO"
Rowdata$(2)="AWC,AYS,AZJ,BAL,BAP,BEN,BHP,BKL,BLD,BOQ,BPT,BRG,BSL,BXB,CAR,CBA,CCL,CCP,CDD,CGC,CGF,CHC"
Rowdata$(3)="CIM,CMW,CPU,CRS,CSL,CTD,CTX,CWN,CWY,DCN,DLX,DMP,DOW,DXS,EHE,EVN,FBU,FLT,FMG,FWD,FXJ,GDX"

open "text.txt" for output as #1
for q = 1 to 3
#1 Rowdata$(q)
next
close #1


q=1
open "text.txt" for input as #2
WHILE not(eof(#2))
line input #2, newline$
Rowdata$(q)= newline$
q=q+1
WEND
maxRows=q
CLOSE #2

END SUB







[Rod]

No ignorance on your part, just lost resources making life difficult. Yes it was recorded as a low priority bug. This from the old bug wiki.

FOR loop counter is not updated if global

Description
If a loop counter of a FOR loop is declared as global, it does not update inside the procedure the counter is used.

Example code to demonstrate the bug.
global count

count = 200

print
print "Counter befor procedure ... "; count

call procedure

print
print "Counter after procedure ... "; count
end

sub procedure
print
print "Counter at beginning of procedure ... "; count
print

for count = 1 to 10
print "Counter inside loop ... "; count
next

print
print "Counter at end of procedure ... "; count
end sub

Example code to work around the bug.
global count

count = 200

print
print "Counter befor procedure ... "; count

call procedure

print
print "Counter after procedure ... "; count
end

sub procedure
print
print "Counter at beginning of procedure ... "; count
print

for i = 1 to 10
count = i
print "Counter inside loop ... "; count
next

print
print "Counter at end of procedure ... "; count
end sub

[metro]

Thanks Rod, for a while I thought I was one step closer to senility

[tsh73]

I think it used to be know issue
global used as FOR loop
(in my tests here)
does not actually change in FOR loop. But still counts.

Interesting.
global i
i = 3
print "i=";i
print "in loop 1 to 5"
for i = 1 to 5
   print "i=";i
next

i = 3
print "i=";i
print "in a sub - loop 1 to 5"
call test

sub test
for i = 1 to 5
   print "i=";i
next
end sub


i=3
in loop 1 to 5
i=1
i=2
i=3
i=4
i=5
i=3
in a sub - loop 1 to 5
i=3
i=3
i=3
i=3
i=3