iConvert 5.sb

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rbytes
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iConvert 5.sb

Post by rbytes » Sun Nov 18, 2018 5:36 pm

A lot of R&D work (Rbytes&Dutchman) went into this version, much of it behind the scenes. Code is much more efficient and stable. You can see the long list of improvements in the comments at the start of the code.
The data files are automatically generated when you first run it.

Normally you will see a category name like "Currency 20181118", showing the year and date of the exchange rates.

If the currency conversion website is offline or you have no internet connection, and there is no currencies.html file, you will now see "Currency X error" in the category list. If you select that category, the two Measures lists will show "Not loaded". The solutions are to restore your internet connection if it is lost, or try again later if the site is offline.

See the screenshots below.

You will need these images:

iconvert3.PNG
iconvert3.PNG (14.12 KiB) Viewed 90 times
iconvert3.GIF
iconvert3.GIF (222.71 KiB) Viewed 90 times

Code: Select all

/*
iConvert 5.sb
by rbytes and Dutchman, November 2018
Converts measurements in many categories.
A collaborative international project.

V5
- Currency start-up made failure-proof
  Downloaded data is stored in an html-file, eg. "currencies.html 20181118",
  where the final 8 characters represent the year, month and date
  If download fails then most recent existing html-file is used
  If failure is complete then Currency category will display "Currency X Error"
- Update begins with 'purging' older html-files.
  So maximum 2 most recent html-files (if date changed) will exist
- Update now reads the most recent html file and generates data in
  a second file named "currencies.table"
  Import currencies simplified via function Table()
- Data rearranged to 'Measure$','Value'
- file "currencies.table" will silently be created if not present.
- Improved iPhone compatibility
- Integrated UpdateCurrencies.functions
  See https://kibernetik.pro/forum/viewtopic.php?f=20&t=2272
- The project continues as a single integrated program.
- The Update Currencies program code is now in a subroutine labelled UpdateData
- Bug fixes
V4
- a Settings button (gear symbol), left of the other buttons. This opens a
  popup Settings window with a switch to set the view for Update Currencies V2.1
  when the switch is off, the currency exchange file is updated without 
  interactivity.
  when the switch is on, the file is updated interactively with the user.
- file "viewstate1" stores the view setting.
- Fuel Economy category added by rbytes, November 2018
- Acceleration category added by rbytes
- Update button added to launch "Update currencies.sb" 
  for updating currency exchange rates
- Flow Rate category added by rbytes
- Angle category added by rbytes
- Energy transition category added by Dutchman
- Temperature category added by Dutchman
V3
- Currency category added by Dutchman
  DATA generated with "Update currencies.sb"
V2
- animation added to title
  (plays only once, at launch)
- measures added in most categories
- scientific notation is now used for
  results larger than 100,000,000 or
  smaller than .00000001
- added Horsepower (Metric) to
  Power category
- eliminated >>> button;
  calculation is now automatic
  when list selections or
  input values are changed.
- code efficiency improved
*/
OPTION BASE 1
SET ORIENTATION LANDSCAPE
SET BUTTONS CUSTOM
SET TOOLBAR OFF
laun$=LAUNCHER$()
GET SCREEN SIZE sw,sh

' set to 1 to test iPhone layout on iPad
iostest=0
IF iostest THEN
  sw=568
  sh=320
ENDIF
rw=sw/1024!rh=sh/740

'b'========= Constants ===================
'' *** Note - IP address may change if router is rebooted ***
'  run ipconfig on your PC to find its IP address.

URL$="192.170.61.43"   ' example of IP address
DIM h$(2)


' each line of a file sent to a PC print server must end with these characters:

cr$=CHR$(13)       ' carriage return character
lf$=CHR$(10)       ' line feed character

'   Currency Data initialisation
CurrencyData$= "currencies.table"
IF NOT FILE_EXISTS(CurrencyData$) THEN
  PRINT "Loading data."
  GOSUB UpdateData
ELSE
  Table(CurrencyData$)
ENDIF
''
' interface object names

x$="guide"
y$="guide2"
n$="title"
o$="category"
p$="from"
q$="to"
pi$="from_in"
qi$="to_in"
qi2$="cover"


lf$=CHR$(10)
q$=CHR$(34)
cat=1          ' default category (angle)
invalue=1
upshift=7

' correction for iPad display only
IF rw=1 then shift=10

' correction for non-iPad display only
IF rw<1 THEN shift2=75 ELSE shift2=-6

fm$="##,###,###,###,###,###,###.#######"    ' formats the result with commas
fm2$="####################.#######"      ' formats the result without commas



' User choice of interface when updating currency exchange rates:
' Silent: view=0
' Interactive: view=1
IF file_exists("viewstate1") and file_exists(CurrencyData$) then
  FILE "viewstate1" READLINE view$
  view=VAL(view$)
ELSE
  view=0
  view$=STR$(view)
END IF
FILE "viewstate1" DELETE
FILE "viewstate1" WRITELINE view$
''


'b'============ Initialisation============
''
GRAPHICS
GRAPHICS CLEAR .9,1,1


 ' animate title if gif animation file exists

PAGE "title" FRAME 0,0,sw,80
PAGE "title" SET
PAGE "title" SHOW
A$="iconvert3.GIF"
IF FILE_EXISTS(A$) THEN
  SPRITE N$ LOAD A$
  SPRITE N$ AT sw/3-shift2,sh/60+3*shift scale 1*rh
  SPRITE N$ SHOW
ELSE
  DRAW IMAGE "iconvert.PNG" AT sw/2.8,sh/20 SCALE .8*rw
ENDIF
PAGE "" SET


' read categories
GOSUB LoadCategories

RESTORE TO acceleration     ' default category
GOSUB setcategory


' create three lists

SET LISTS FONT SIZE 18*rw
LIST o$ TEXT cat$ AT sw*.1,260*rh SIZE 240*rw,310*rh
LIST o$ SELECT cat
LIST p$ TEXT measure$ AT sw*.385,260*rh SIZE 240*rw,310*rh
LIST p$ SELECT 1
LIST q$ TEXT measure$ AT sw*.672,260*rh SIZE 240*rw,310*rh
LIST q$ SELECT 1


' create fields and buttons

GOSUB FieldsAndButtons

timer=time ()    ' set timer to stop title anim after one cycle

'b'========== main program loop ===================
''
DO

' play once, then stop animation

IF time()-timer>1 AND time()-timer <2 and not noplay THEN
  IF FILE_EXISTS(A$) THEN SPRITE N$ PLAY
  noplay=1
ENDIF
IF time()-timer>6 AND time()-timer <7 THEN
  IF FILE_EXISTS(A$) THEN SPRITE N$ STOP
ENDIF


' check which category is selected

type=LIST_SELECTED(o$)


' choose and prepare a new category if necessary

IF type<>cat THEN GOSUB CatChange

IF LIST_SELECTED(p$)<>selp or LIST_SELECTED(q$)<>selq then changed=1


' calculate the conversion

if VAL(FIELD_TEXT$(pi$))<>invalue or changed then
  invalue=VAL(FIELD_TEXT$(pi$))
  selp=LIST_SELECTED(p$)
  selq=LIST_SELECTED(q$)
  GOSUB Convert ' calculate OutValue
  if outvalue<100000000 and outvalue>.000000001 then 
    out$=STR$(outvalue,fm$)
    out2$=STR$(outvalue,fm2$)
    format(out$)!out$=format.form$
    format(out2$)!out2$=format.form$
  else
    out$=STR$(outvalue)
  endif
  fsize=22*rw
  FIELD qi$ FONT SIZE fsize
  FIELD qi$ TEXT out$
  FIELD qi2$ TEXT ""
ENDIF

IF bp("settings") THEN
  showswitch=1
  gosub settings
ENDIF

'
IF bp("update") THEN
  gosub updatedata
  LIST o$ TEXT cat$
  LIST p$ TEXT measure$
  LIST q$ TEXT measure$
  LIST o$ SHOW
  LIST p$ SHOW
  LIST q$ SHOW
ENDIF


' copy the conversion info to clipboard

IF bp("copy") THEN
  GOSUB compile
  IF cp=0 THEN!CLIPBOARD CLEAR!cp=1!ENDIF
  CLIPBOARD WRITE convert$
  BEEP
ENDIF


' print the conversion info

IF bp("print") THEN
GOSUB compile
h$(1) = "content-type:text/html"   ' make header info
h$(2) = "content-length:" & LEN(convert$)

' print convert$ using Henko print technique
HTTP URL$ HEADER H$ POST convert$   ' send doc to the print server
BEEP
ENDIF


' save the conversion info to a file

IF bp("save") THEN
  GOSUB compile
  fname$="converted.txt"
  IF FILE_EXISTS(fname$) THEN FILE fname$ DELETE
  FILE fname$ WRITELINE convert$
  BEEP
ENDIF


' end the program

IF bp("stop") THEN
 view$=STR$(view)
  FILE "viewstate1" DELETE
  FILE "viewstate1" WRITELINE view$
  IF laun$="desktop" THEN
    IF FILE_EXISTS("/launch") THEN
      RUN "/-Launch.sb"
    ELSE
      EXIT
    ENDIF
  ENDIF
  END
ENDIF
SLOWDOWN
UNTIL 0
END
'g'========== Subroutines and Functions =============

Convert:
'--- Convert via formula
'  temperature
IF Cat$(cat)=Tscale$ THEN
  Outvalue=FromCelsius(Celsius(Invalue,measureval(selp)),measureval(selq))
  RETURN
ENDIF
'--- Convert via ratio
  outvalue=invalue*1/(measureval(selq)/measureval(selp))
RETURN

' temperature conversion

DEF FromCelsius(Value,UnitPointer)
'Converts Value on 'Unit'-scale to Celsius-scale
'  to newvalue in scale of Unitpointer
ON UnitPointer GOTO 1,2,3,4,5,6,7,8
  1 RETURN Value 'Celsius
  2 RETURN Value+273.15 'Kelvin
  3 RETURN Value*9/5+32 'Fahrenheit
  4 RETURN (Value+273.15)*9/5 'Rankine
  5 RETURN (100-Value)*3/2 'Delisle
  6 RETURN Value*33/100 'Newton
  7 RETURN Value*4/5 'Réamur
  8 RETURN Value*21/40+7.5 'Rømer
END DEF
'
DEF Celsius(Value,UnitPointer)
'Converts Value in 'Unit' to new value in Celsius
ON UnitPointer GOTO 1,2,3,4,5,6,7,8
  1 RETURN Value 'Celsius
  2 RETURN Value-273.15 'Kelvin
  3 RETURN (Value-32)*5/9 'Fahrenheit
  4 RETURN (Value-491.67)*5/9 'Rankine
  5 RETURN 100-Value*2/3 'Delisle
  6 RETURN Value*100/33 'Newton
  7 RETURN Value*5/4 'Réamur
  8 RETURN (Value-7.5)*40/21 'Rømer
END DEF


' choose and prepare a new category

CatChange:
oldcat=cat
cat=type
changed=1
ON cat GOTO accel,angles,areas,cook,curr,datasize,energ,entrans,flow,leng,prefix,pow,press,spd,tscales,time,vol,wgt
accel:
  RESTORE TO acceleration ! GOTO skip
angles:
  RESTORE TO angle ! GOTO skip
areas:
  RESTORE TO area ! GOTO skip
cook:
  RESTORE TO cooking ! GOTO skip
curr:
   GOTO skip
datasize:
  RESTORE TO data ! GOTO skip
energ:
  RESTORE TO energy ! GOTO skip
entrans:
  RESTORE TO EnergyTransition ! GOTO skip
flow:
  RESTORE TO FlowRate ! GOTO skip
leng:
  RESTORE TO length ! GOTO skip
prefix:
  RESTORE TO prefixes ! GOTO skip
pow:
  RESTORE TO power ! GOTO skip
press:
  RESTORE TO pressure ! GOTO skip
spd:
  RESTORE TO speed ! GOTO skip
tscales:
  RESTORE TO Temperatures ! GOTO Skip
time:
  RESTORE TO timing ! GOTO skip
vol:
  RESTORE TO volume ! GOTO skip
wgt:
  RESTORE TO weight ! GOTO skip
'--- 
skip:
  if INSTR(Cat$(cat),Curr$,1)>0 then
    GOSUB currcalc
  else
    GOSUB setcategory
  endif
  LIST p$ TEXT measure$
  LIST p$ SELECT 1
  LIST q$ TEXT measure$
  LIST q$ SELECT 1
  FIELD pi$ TEXT "1"
RETURN

' read the data for a category

setcategory:
READ items
DIM measure$(items)
DIM measureval(items)
FOR t=1 TO items
  READ measure$(t)
 READ measureval(t)
NEXT t
RETURN

'  load or rewrite categories

LoadCategories:
'  set variables
Curr=Table.count
CurrDate$=Table.Date$
Curr$="Currency "
Tscale$="Temperature"
'  read data
RESTORE TO Categories
READ cats
DIM Cat$(cats)
FOR t=1 TO cats
  READ cat$(t)
NEXT t
RETURN

'  read table

DEF Table(file$)
IF NOT FILE_EXISTS(File$) THEN
  GOSUB Error ! count=1
  RETURN count
ENDIF
' read data from table
FILE File$ SETPOS 0
FILE File$ READLINE Title$
FILE File$ READLINE Date$
Date$=LEFT$(Date$,8)
FILE File$ READLINE Count
IF Count<1 THEN Count=1
DIM Name$(count), Value(count)
IF Count=1 THEN
  GOSUB Error
ELSE
  FOR n=1 TO count
    FILE File$ READLINE Line$
    SPLIT Line$ TO a$,a WITH ";"
    Name$(n)=a$(1) ! Value(n)=VAL(a$(2))
  NEXT n
ENDIF
RETURN count
Error: ' local sub
Name$(1)="Not loaded"
Value(1)=1
Date$="❌ Error"
RETURN 'from local sub
END DEF


'  load currencies in list arrays

currcalc:
DIM measure$(curr) 
FOR t=1 TO curr
  measure$(t)=Table.name$(t)
NEXT t
DIM measureval(curr)
FOR t=1 TO curr
  measureval(t)=Table.value(t)
NEXT t
RETURN


' prepare a string showing the conversion, for copying or saving to a file

compile:
  selp=LIST_SELECTED(p$)
  selq=LIST_SELECTED(q$)
  temp1$=measure$(selp)
  temp2$=measure$(selq)


  ' if a value is 1 or a fraction, change the name from plural to singular
  convin=val(FIELD_TEXT$(p$))
  temp1len=LEN(temp1$)
  IF convin=<1 AND RIGHT$(temp1$,1)="s" THEN temp1$=LEFT$(temp1$,temp1len-1)
  IF VAL(out2$)=<1 AND RIGHT$(temp2$,1)="s" THEN temp2$=LEFT$(temp2$,LEN(temp2$)-1)
  convert$&=FIELD_TEXT$(pi$)&" "&temp1$&" = "&FIELD_TEXT$(qi$)&" "&temp2$
  convert$&=cr$&lf$&FIELD_TEXT$(pi$)&" "&temp1$&" = "&out2$&" "&temp2$&cr$&lf$&cr$&lf$
RETURN


' settings window

settings:
a$=lf$&"When updating currency data, choose if you want interactive mode. When the switch is off, the currency exchange file is updated without interactivity. When the switch is on, the file is updated interactively with the user."
pw("notice","Settings",a$,sw/2-200*rw,sh/4,400*rw,400*rw,1,1,1,1)
goto message

message:
wait: SLOWDOWN
IF SWITCH_CHANGED("inter") THEN
  .view=SWITCH_STATE("inter")
  view$=STR$(.view)
  FILE "viewstate1" DELETE
  FILE "viewstate1" WRITELINE view$
ENDIF
IF BUTTON_PRESSED("close") THEN
  PAGE pw.NAME$ HIDE ! PAGE "" SET ! PAGE "" SHOW
  GOSUB drawscreen
ELSE 
  GOTO wait
ENDIF
RETURN

drawscreen:
  FILL COLOR .6,.8,.8
  FILL RECT sw*.395,145*rh TO sw*.6,185*rh-vshift
  FILL COLOR .8,.8,.8
  FILL RECT sw*.635,140*rh TO sw*.92,190*rh-vshift
  DRAW COLOR 0,0,0
  DRAW RECT sw*.1-1,258*rh TO sw*.1+240*rw+1,258*rh+312*rh
  DRAW RECT sw*.386-2,258*rh TO sw*.386+240*rw,258*rh+312*rh
  DRAW RECT sw*.673-2,258*rh TO sw*.673+240*rw,258*rh+312*rh
  DRAW LINE sw*.26,168*rh TO sw*.392,168*rh
  DRAW LINE sw*.096,618*rh TO sw*.38,618*rh
  DRAW LINE sw*.63,618*rh TO sw*.91,618*rh
  FILL COLOR 0,0,0
  FILL CIRCLE sw*.39,168*rh SIZE 3*rw
  FILL COLOR .8,.8,.8
  SET BUTTONS FONT NAME "Arial"
RETURN

' create fields and buttons

FieldsAndButtons:
SET BUTTONS FONT SIZE 20*rw
SET BUTTONS FONT NAME "Arial"
DRAW COLOR 0,0,0
guide$="Pick from each list"&lf$&"Enter quantity here"
FILL COLOR 0,0,0
FILL CIRCLE sw*.39,168*rh SIZE 3*rw
FILL COLOR 1,1,1
FIELD x$ TEXT guide$ AT sw*.1,132*rh-upshift SIZE 250,60 RO ML
FIELD x$ FONT SIZE 18*rw
FIELD x$ BACK ALPHA 0
guide2$="All lists can be scrolled"
DRAW LINE sw*.26,168*rh TO sw*.392,168*rh
DRAW LINE sw*.096,618*rh TO sw*.38,618*rh
DRAW LINE sw*.63,618*rh TO sw*.91,618*rh
FIELD y$ TEXT guide2$ AT sw*.41,600*rh-upshift*.8 SIZE 250,60 RO ML
FIELD y$ FONT SIZE 18*rw
FIELD y$ BACK ALPHA 0
FIELD o$ TEXT "CATEGORY" AT sw*.115,210*rh SIZE 130,30 RO
FIELD o$ FONT SIZE 20*rw
FIELD o$ BACK ALPHA 0
FIELD p$ TEXT "FROM" AT sw*.405,210*rh SIZE 100,30 RO
FIELD p$ FONT SIZE 20*rw
FIELD p$ BACK ALPHA 0
FIELD q$ TEXT "TO" AT sw*.69,210*rh SIZE 70,30 RO
FIELD q$ FONT SIZE 20*rw
FIELD q$ BACK ALPHA 0
FILL ALPHA 0
SET BUTTONS FONT SIZE 24*rw
BUTTON "settings" TEXT CHR$(9881) AT 90*rw,648*rh SIZE 50*rw,50*rh
SET BUTTONS FONT SIZE 20*rw
BUTTON "update" TEXT "UPDATE" AT 190*rw,650*rh SIZE 100*rw,50*rh
BUTTON "copy" TEXT "COPY" AT 330*rw,650*rh SIZE 100*rw,50*rh
BUTTON "print" TEXT "PRINT" AT 470*rw,650*rh SIZE 100*rw,50*rh
BUTTON "save" TEXT "SAVE" AT 610*rw,650*rh SIZE 100*rw,50*rh
BUTTON "stop" TEXT "STOP" AT 750*rw,650*rh SIZE 100*rw,50*rh
FILL ALPHA 1
FIELD pi$ TEXT "1" AT sw*.400,150*rh SIZE 200*rw,30*rh
FIELD pi$ FONT SIZE 18*rw
FIELD qi$ TEXT "1" AT sw*.640,145*rh SIZE 280*rw,40*rh
FIELD qi$ FONT SIZE 22*rw
FIELD qi2$ TEXT "" AT sw*.640,145*rh SIZE 280*rw,40*rh RO
FIELD qi2$ BACK ALPHA 0
if rw<1 then vshift=2
FILL COLOR .6,.8,.8
FILL RECT sw*.395,145*rh TO sw*.6,185*rh-vshift
FILL COLOR .8,.8,.8
FILL RECT sw*.635,140*rh TO sw*.92,190*rh-vshift
DRAW RECT sw*.1-1,258*rh TO sw*.1+240*rw+1,258*rh+312*rh
DRAW RECT sw*.386-2,258*rh TO sw*.386+240*rw,258*rh+312*rh
DRAW RECT sw*.673-2,258*rh TO sw*.673+240*rw,258*rh+312*rh
RETURN


'y'
UpdateData:
' Update Currencies by Dutchman, October 2018
'==== Presets ====
GOSUB PresetView
'
'==== Main Update Routine ====
IF Update(View,Top$) THEN
 FIELD Top$ BACK COLOR 0,0,1
  Field Top$ TEXT  "Data written to """&SortAndStore.File$&"""."
ELSE
  FIELD Top$ BACK COLOR 1,0,0
  Field Top$ TEXT Update.Msg$
ENDIF
PAUSE 1
FIELD Top$ BACK COLOR 0,0,1
FIELD Top$ HIDE
BROWSER "a" HIDE
CALL Table(CurrencyData$)
GOSUB LoadCategories
GOSUB drawscreen
RETURN
'
'========== Update Currencies Subroutines and Functions ===========
'r'
CreateData:
GOSUB PresetView
IF Input$(Top$,"No currency data. Create?")="n" THEN
  FIELD Top$ HIDE ! RETURN
ENDIF
FIELD Top$ HIDE
IF NOT Update(view,Top$) THEN
  FIELD Top$ BACK COLOR 1,0,0
  IF Update.Msg$="" THEN
    Field Top$ TEXT "No currency data."
  ELSE ! Field Top$ TEXT Update.Msg$
  ENDIF
ELSE
  FIELD Top$ BACK COLOR 0,0,1
  Field Top$ TEXT  "Data written to """&Update.DataFile$&"""."
ENDIF
PAUSE 1
FIELD Top$ HIDE
RETURN
''
'r'
PresetView:
IF NOT viewpreset THEN
  '--- presets
  Top=MAX(17,MIN(sw,sh)/32) ' top space
  YesNoPos=sw/2 ' x-position of buttons
  TopFont=0.7*top 'fontsize
  '--- Prepare browser
  SET BROWSERS SCALED
  BROWSER "a" AT 0,top SIZE sw,sh-top
  BROWSER "a" HIDE
  '--- make buttons
  SET BUTTONS FONT SIZE topfont
  SET BUTTONS FONT NAME "Menlo"
  DRAW COLOR 1,1,0
  FILL COLOR 1,0,0
  BUTTON "yes" TEXT "Yes" AT YesNoPos,0 SIZE 3*top,top
  BUTTON "yes" HIDE
  BUTTON "no" TEXT "No" AT YesNoPos+3*top,0 SIZE 3*top,top
  BUTTON "no" HIDE
  '--- Make Messagefield
  Top$="In" ' Field for input
  FIELD Top$ AT 0,0 SIZE sw/2,top
  FIELD Top$ FONT NAME "Menlo"
  FIELD Top$ FONT SIZE topfont
  FIELD Top$ FONT COLOR 1,1,0
  FIELD Top$ BACK COLOR 0,0,1
  FIELD Top$ HIDE
  '--- don't recall
  viewpreset=1
ENDIF
RETURN
''
'r'
DEF Update(view,iField$)
'--- constants
Source$="https://www.x-rates.com/table/?from=USD&amount=1"
MaxCount=100 ' max number of currencies
WebPage$="currencies.html" ' undated webpage filename
'--- Output variables
OK=0
DIM Data$(maxcount,2) ' array for extracted data
DataFile$=.CurrencyData$ ' file with DATA-lines
'--- purge html-files
CALL LatestFile$(webpage$,1)
'--- messagebar
IF view THEN
  FIELD iField$ SHOW
  FIELD iField$ BACK COLOR 0,0,1
ENDIF
'--- Select and store source
IF view THEN web$=LatestFile$(webpage$,0)
IF web$="" THEN web$=WebPage$
web$=MakeCurrencyHTML$(Source$,Web$,view,iField$,"a")
IF web$="fail" THEN web$=LatestFile$(webpage$,0)
IF web$="" THEN 
  Msg$="Cancelled."
  RETURN 0
ENDIF
'---- Extract data from HTML-file
IF View THEN FIELD iField$ SHOW
FIELD iField$ BACK COLOR 0,0,1
FIELD iField$ TEXT "Extracting second table."
IF ExtractHtml(view,web$,Data$,iField$)=0 THEN
  Msg$=ExtractHtml.Msg$
  RETURN 0
ENDIF
'--- Sort and write to data-file
FIELD iField$ TEXT "Writing to """&DataFile$&"""."
CALL SortAndStore(DataFile$,Data$,ExtractHtml.count)
OK=1
RETURN 1
END DEF
''
'r'
DEF SortAndStore(File$,Data$(,),items)
Quicksort$(Data$,Extract.count,2,1)
Date$= ExtractHtml.DataDate$
items+=1 'add 1 to include reference value US-dollar
'--- Make table-file
IF FILE_EXISTS(File$) THEN FILE File$ DELETE
FILE File$ PRINT "Currency"
FILE File$ PRINT Date$&" = download date"
FILE File$ PRINT items&" = items in Currencies"
File File$ PRINT "US dollar"&"; 1"
FOR i=1 TO items-1
  File File$ PRINT Data$(i,1)&"; "&Data$(i,2)
NEXT i
END DEF
''
'r'
DEF ExtractHtml(view,HtmlFile$,Data$(,),iField$)
/* single item in HTML-text to parse:
<tr>
<td>Argentine Peso</td>
<td class='rtRates'><a href='… url …/?from=USD&amp;to=ARS'>36.446414</a></td>
<td class='rtRates'><a href='… url …/?from=ARS&amp;to=USD'>0.027438</a></td> 
</tr>
*/
count=0
'--- Read body into a$
GOSUB ReadTableBody ' local subroutine
IF Msg$<>"" THEN RETURN 0
'--- Store HTML table-rows
p1=INSTR(a$,"<tr",1)
WHILE p1>0 AND count<update.maxcount
 p2=INSTR(a$,"/tr>",p1)
  first=p2 
  IF first>0 THEN
    count+=1
    Data$(count,1)=SUBSTR$(a$,p1,p2)
  ENDIF
  p1=INSTR(a$,"<tr",first)
END WHILE
'--- Check table-size
IF count>=update.maxcount THEN
  Msg$="Data-array is too small. Increase constant 'count'."
  RETURN 0
ENDIF
'--- extract valuta and value
FOR i=1 TO count
  p1=INSTR(Data$(i,1),"<td>",1)+4
  p2=INSTR(Data$(i,1),"<",p1)-1
  Valuta$=SUBSTR$(Data$(i,1),p1,p2)
  p1=INSTR(Data$(i,1),"to=USD'>",p2)+8
  p2=INSTR(Data$(i,1),"</a",p1)-1
  Value$= SUBSTR$(Data$(i,1),p1,p2)
  Data$(i,1)=Valuta$ ! Data$(i,2)=Value$
NEXT i
RETURN 1  ' all OK 
ReadTableBody: ' ------------ local subroutine
'--- Extract date from filename
DataDate$=RIGHT$(TRIM$(HtmlFile$),8)
'--- Find second table
FILE HtmlFile$ SETPOS 0
Msg$="Second marker """&"tbody"&""" not found."
FOR i=1 TO 2
  DO
    FILE HtmlFile$ READLINE Line$
    IF Line$<>"" THEN p1=INSTR(Line$,"<tbody",1)
  UNTIL p1>0 OR FILE_END(HtmlFile$)
  IF FILE_END(HtmlFile$) THEN RETURN 'Msg$ is set
NEXT i
IF p1<1  THEN RETURN' Msg$ is preset
'--- Read table-body
a$=Line$
DO
  FILE HtmlFile$ READLINE Line$
  a$&=Line$
  p2=INSTR(a$,"/tbody",1)
UNTIL FILE_END(HtmlFile$) OR p2>0
Msg$&=" (no end-marker)"
IF p2<1 THEN RETURN ' Msg$ is preset
Msg$=""
RETURN ' from local sub
END DEF
''
'r'
DEF MakeCurrencyHTML$(Url$,HtmlFile$,iview,iField$,Browser$)
'HtmlFile$ contains name of existing file or undated name
'returns filename if HtmlFile$ is updated
'If 'htm-file$' was not existing then name is extended with date
IF FILE_EXISTS(HtmlFile$) AND iView THEN
  prompt$ ="Latest update: "
  prompt$&= RIGHT$(HtmlFile$,8)
  prompt$&=". Download new?"
  Answer$=Input$(iField$, prompt$)
  FIELD iField$ BACK COLOR 0,0,1
  IF Answer$="n" THEN
    NewData=0
    FIELD iField$ BACK COLOR 0,0,1
    Field iField$ TEXT  "Reading data"
    BROWSER Browser$ SHOW
    LIST .o$ HIDE
    LIST .p$ HIDE
    LIST .q$ HIDE
    FIELD .pi$ HIDE
    FIELD .qi$ HIDE
    BROWSER Browser$ TEXT PageContent$(HtmlFile$)
 ELSE ! NewData =1
  ENDIF
ELSE ! NewData =1
ENDIF
'----  Update webdata
IF NewData THEN
  SPLITE HtmlFile$ TO a$,n with " "
  HtmlFile$=a$(1)&" "&ISO_Date$
  FIELD iField$ BACK COLOR 0,0,1
  Field iField$ TEXT  "Collecting data"
  IF iView THEN
    BROWSER Browser$ URL Url$
    BROWSER Browser$ SHOW
    LIST .o$ HIDE
    LIST .p$ HIDE
    LIST .q$ HIDE
    FIELD .pi$ HIDE
    FIELD .qi$ HIDE
  ENDIF
ENDIF
Inspect:
  '---- Continue or return
IF NOT iView THEN Download
prompt$= "Continue?"
Answer$=Input$(iField$, prompt$)
FIELD iField$ BACK COLOR 0,0,1
BROWSER Browser$ HIDE
LIST .o$ SHOW
LIST .p$ SHOW
LIST .q$ SHOW
FIELD .pi$ SHOW
FIELD .qi$ SHOW
IF Answer$="n" THEN RETURN ""
DownLoad:
FIELD iField$ BACK COLOR 0,0,1
'---- download binary contents
FIELD iField$ BACK COLOR 0,0,1
Field iField$ TEXT "Loading webpage"
IF NewData THEN
  HTTP Url$ GETDIM Bin
  GET DIM Bin XSIZE size
  IF SIZE<1 THEN RETURN "fail"
  FILE HtmlFile$ WRITEDIM Bin
ENDIF
RETURN HtmlFile$
END DEF
'r'
DEF LatestFile$(undated$,purge) 
' find latest file with 'Undated$' in name
' if purge=1 then delete older files
File$=""
DIR "." LIST FILES A$,n
FOR i=1 TO n
  IF INSTR(a$(i),undated$,1)=1 THEN File$=a$(i)
NEXT i
IF Purge THEN
  FOR i=1 to n
    IF INSTR(a$(i),undated$,1)=1 AND a$(i)<>File$ THEN FILE a$(i) DELETE
  NEXT i
ENDIF
Date$=RIGHT$(File$,8)
RETURN File$
END DEF
''
'r'
DEF ISO_Date$
Date$=STR$(CURRENT_YEAR()*10000+100*CURRENT_MONTH()+CURRENT_DATE(),"########")
ISO_Date$=Date$
END DEF ' ISO_Date$
''
'r'
DEF PageContent$(file$) ' read html-content
FILE file$ SETPOS 0
content$=""
WHILE NOT FILE_END(file$)
  FILE file$ READLINE line$
  content$&=Line$
END WHILE
RETURN content$
END DEF
''
'r'
DEF Input$(Field$,Prompt$)
' Input from buttons
FIELD Field$ BACK COLOR 1,0,0
FIELD Field$ SHOW
FIELD Field$ TEXT Prompt$
BUTTON "yes" SHOW
BUTTON "no" SHOW
T$=""
DO
  IF bp("yes") THEN T$="y"
  IF bp("no") THEN T$="n"
  SLOWDOWN
UNTIL T$<>""
BUTTON "yes" HIDE
BUTTON "no" HIDE
RETURN T$
END DEF
''
'r'
DEF Quicksort$(Array$(,),MaxRow,Rowsize,SortColumn)' for STRINGS
' by Dutchman
' Non-recursive version of the QuickSort algorithm
' This sortfunction operates on a 2-dimensional string-array
' Number of rows is <MaxRow> and number of columns is <RowSize>
' The variable <SortColumn> determines which column is sorted
ShowMaxStack=0 ' will display stack-usage if set to 1
MaxStackPtr=0
DIM SwapRow$(RowSize), Stack1$(30), Stack2$(30)
StackPtr=0 ! HeadPtr=1 ! TailPtr=MaxRow
Qlabel2:
IF HeadPtr>TailPtr THEN
  GOTO Qlabel4
ELSE
  Pivot$= CAPSTR$(Array$((HeadPtr+TailPtr)/2,SortColumn))
  qa=HeadPtr ! qb=TailPtr
  Qlabel1:
  IF CAPSTR$(Array$(qa,SortColumn))<Pivot$ THEN ' while2
    qa=qa+1
    GOTO Qlabel1
  END IF '1
Qlabel3:   
  IF CAPSTR$(Array$(qb, SortColumn))>Pivot$ THEN
    qb=qb-1
    GOTO Qlabel3
  END IF '2
  IF qa<qb THEN
  ' swap rows
    FOR qi=1 TO RowSize
      SwapRow$(qi)=Array$(qa,qi)'save row qa
      Array$(qa,qi)=Array$(qb,qi)'store row qb content in row qa
      Array$(qb,qi)=SwapRow$(qi)'restore content of row qa to row qb
    NEXT qi
    qa=qa+1
    qb=qb-1
    GOTO Qlabel1
   END IF '3
  IF qa=qb THEN
    qq = qb - 1
    qr = qa + 1
  ELSE
    qq = qb
    qr = qa
  END IF '4
  StackPtr = StackPtr + 1
  IF MaxStackPtr<StackPtr THEN
    MaxStackPtr=StackPtr        
  END IF '5      
  qp=HeadPtr
  qs=TailPtr
  IF (qq-qp)<(qs-qr) THEN
    Stack1$(StackPtr)=qr
    Stack2$(StackPtr)=qs
    HeadPtr=qp
    TailPtr=qq
  ELSE
    Stack1$(StackPtr) = qp
    Stack2$(StackPtr) = qq
    HeadPtr = qr
    TailPtr = qs
  END IF '6
  GOTO Qlabel2
END IF '7
Qlabel4:
IF StackPtr > 0 THEN
  HeadPtr = Stack1$(StackPtr)
  TailPtr = Stack2$(StackPtr)
  StackPtr = StackPtr - 1
  GOTO Qlabel2
END IF '8
IF ShowMaxStack THEN
  PRINT "Maximum stacksize=";MaxStackPtr
END IF '9
END DEF ' QuickSort$
' end of Update Currencies code
'g'

' shortcut for button press

DEF bp(a$) = BUTTON_PRESSED(a$)


' remove scientific notation before displaying result

DEF format(form$)
  WHILE LEFT$(form$,1)=" " OR LEFT$(form$,1)=","
    form$=RIGHT$(form$,LEN(form$)-1)
    ' trim leading spaces and separators
  ENDWHILE
  IF INSTR (form$, ".") THEN        ' if form$ has a decimal point
    IF NOT numpad.curr THEN
    ' trim trailing zeros
    WHILE RIGHT$(form$,1)="0"
      form$=LEFT$(form$,LEN(form$)-1)
    ENDWHILE
    IF RIGHT$(form$,1)="." THEN
      form$=LEFT$(form$,LEN(form$)-1)
    ENDIF
    ENDIF
  ENDIF
END DEF

DEF pw(NAME$,title$,a$,xs,ys,ww,hh,R,G,B,ALPHA)
GRAPHICS CLEAR .9,1,1
PAGE NAME$ SET
PAGE NAME$ SHOW
PAGE NAME$ FRAME xs,ys,ww,hh
PAGE NAME$ COLOR R,G,B,ALPHA
PAGE "" HIDE
FIELD NAME$ TEXT a$ at 20*.rw,50*.rh size 360*.rw,360*.rh ML RO
FIELD NAME$ FONT SIZE 18*.rw
IF .rw<1 THEN lshift=12 ELSE lshift=0
IF title$="Settings" THEN
  if .rw<1 THEN
    FIELD "labels" TEXT "OFF                        ON" at 108*.rw,307*.rh RO
  ELSE
    FIELD "labels" TEXT "OFF               ON" at 130*.rw,307*.rh RO
  ENDIF
  FIELD "labels" FONT SIZE 18*.rw
  SWITCH "inter" STATE .view AT 177*.rw-lshift,310*.rh
ENDIF
FILL ALPHA 0
BUTTON "close" title "❎" AT ww-30,5 SIZE 24,24
FILL ALPHA 1
BUTTON "bottom" title "" AT -6,hh-3 SIZE ww+12,3
BUTTON "left" title "" AT 0,-6 SIZE 3,hh+12*.rh
BUTTON "right" title "" AT ww-3,-6 SIZE 3,hh+12*.rh
BUTTON "upper1" title "" AT -6,0 SIZE ww+12,3
BUTTON "upper2" title "" AT -6,30 SIZE ww+12,3
BUTTON "title" title title$ AT ww/2-50*.rw,3+lshift/2 SIZE 100*.rw,28*.rw

'
' other UI objects
'
'
END DEF
''

/*
Conversion Data

The technique I use to calculate conversions is to choose a reference measure in the middle of the range and set its value to 1. All other measures are then assigned numbers representing the ratio of their value to the reference measure's value.
*/

Categories:
DATA 18 ' number of categories
DATA "Acceleration", "Angle", "Area", "Cooking", Curr$&CurrDate$ ,"Data", "Energy", "Energy Transition"
DATA "Flow Rate", "Length", "Prefixes", "Power", "Pressure", "Speed",Tscale$, "Time", "Volume", "Weight"

Acceleration:
DATA 7 ' number of items
DATA "Centimeters Per Sec²",0.01 , "Inches per Second²",0.0254 , "Feet per Second²",0.3048 , "Meters Per Second²",1 , "Galileos",0.01 , "Leos",10 , "Gravity",9.80665

Angle:
DATA 9 ' number of items
DATA "Degrees",1 , "Radians",57.2958 , "Gradians",0.9 , "Minutes",0.0166667 , "Seconds",0.000277778 , "Circles",360 , "Quadrants",90 , "Points",11.25 , "Mils",0.05625

Area:
DATA 9 ' number of items
DATA "Acres",4046.86 , "Square Kilometers",1E+06 , "Hectares",10000 , "Square Meters",1 , "Square Centimeters",0.0001 , "Square Miles",2.58999E+06 , "Square Yards",0.836127 , "Square Feet",0.092903 , "Square Inches",0.00064516

Cooking:
DATA 9 ' number of items
DATA "Centiliters",0.35195 , "Cups (CD)",8 , "Fluid Ounces (CD)",1 , "Liters",35.1951 , "Milliliters",0.035195 , "Pints (CD)",20 , "Quarts (CD)",40 , "Tablespoons",0.520421 , "Teaspoons",0.173474

Data:
DATA 8 ' number of items
DATA "Bits",0.000125 , "Bytes",0.001 , "Words",0.008 , "Kilobytes",1 , "Megabytes",1000 , "Gigabytes",1E+06 , "Terabytes",1E+09 , "Petabytes",1E+12

Energy:
DATA 12 ' number of items
DATA "BTU",251.996 , "Calories",1 , "Cubic Mile of Oil",3.83347E+19 , "Foot Pounds",0.324048 , "Horsepower Per Hr",641616 , "Joules",0.239006 , "KiloJoules",239.006 , "KiloCalories",1000 , "Kilowatt Hours",860421 , "Kilotons",1E+12 , "MegaJoules",239006 , "Therms (US)",2.52104E+07

EnergyTransition:
DATA 28 ' number of items
DATA "Watt",1 , "Kilowatt",1000 , "Kwh/y",0.114077 , "Kg/y Coal",0.746571 , "Kg/y Brown coal",0.475321 , "Kg/y Peat dry",0.475321 , "Kg/y Wood",0.475321 , "Kg/y Fat",1.17246 , "Kg Battery Li-Po Li-Hv",0.0570386 , "m² Solar panel",31.6564 , "Liter/y petrol",1.08373 , "Liter/y diesel oil",1.22316 , "Liter/y heating oil",1.18197 , "Liter/y Hydrogen 700bar",0.29058 , "Liter/y Alcohol",0.741501 , "Liter/y LNG",0.703476 , "Liter/y LPG",0.814384 , "Liter/day heating oil",431.713 , "Liter/day LNG",256.944 , "Liter/day LPG",297.454 , "m³/y natural gas",1.23425 , "m³/y natural gas NL",1.05838 , "m³/y Hydrogen",0.5357 , "m³/day natural gas",450.81 , "m³/day natural gas NL",386.574 , "m³/day Hydrogen",195.664 , "m³/day water to ice",3865.74 , "g/y Thorium",2516.67

FlowRate:
DATA 17 ' number of items
DATA "Cubic Meters per Sec",951019 , "Cubic Meters per Min",15850.3 , "Cubic Meters per Hour",264.172 , "Liters per Second",951.019 , "Liters per Minute",15.8503 , "Liters per Hour",0.264172 , "Cubic Feet per Sec",26929.9 , "Cubic Feet per Minute",448.831 , "Cubic Feet per Hour",7.48052 , "Gallons (US) per Sec",3600 , "Gallons (US) per Min",60 , "Gallons (US) per Hour",1 , "Gallons (US) per Day",0.0416667 , "Gallons (UK) per Sec",4323.42 , "Gallons (UK) per Min",72.057 , "Gallons (UK) per Hour",1.20095 , "Gallons (UK) per Day",0.0500396

Length:
DATA 13 ' number of items
DATA "Ångströms",1E-08 ,"Centimeters",1 , "Fathoms",182.88 , "Feet",30.48 , "Furlongs (US)",20116.8 , "Inches",2.54 , "Kilometers",100000 , "Meters",100 ,"Mils",0.00254 , "Miles",160934 , "Millimeters",0.1 , "Nanometers",1E-07 , "Yards",91.44

Power:
DATA 14 ' number of items
DATA "Watts",1 ,"Kilowatts",1000 , "Megawatts",1E+06 , "Gigawatts",1E+09 , "Terawatts",1E+12 , "KWh/year",1000 , "MegaJoule/year (MJ/y)",1E+06 ,"Horsepower (IT)",745.7 , "Horsepower (Metric)",756.042 , "Moosepower",2438.44 , "Calories per Hour",0.0011629 , "BTU per Hour",2.93071E+09 , "Foot Pounds per Hr",3.76616E+09 , "Tons Refrigeration",3516.8

Prefixes:
DATA 21 ' number of items
DATA "yotta",1E+24 , "zetta",1E+21 , "exa",1E+18 , "peta",1E+15 , "tera",1E+12 , "giga",1E+09 , "mega",1E+06 , "kilo",1000 , "hecto",100 , "deca",10 , "none",1 , "deci",0.1 , "centi",0.01 , "milli",0.001 , "micro",1E-06 , "nano",1E-09 , "pico",1E-12 , "femto",1E-15 , "atto",1E-18 , "zepto",1E-21 , "yocto",1E-24

Pressure:
DATA 13 ' number of items
DATA "Bars",1000 , "Millibars",1 , "Pascals",0.01 , "HectoPascals",1 , "KiloPascals",10 , "MegaPascals",10000 , "Atmospheres",1013.25 , "Pounds per Sq. Foot",0.478803 , "Pounds per Sq. Inch",68.9476 , "Inches of Water",2.49089 , "Inches of Mercury",33.864 , "Centimeters of Water",0.980665 , "Centimeters of Mercury",13.3323

Speed:
DATA 11 ' number of items
DATA "Feet per Second",1.09728 , "Feet per Minute",0.018288 , "Furlongs per Fortnight",0.000598715 , "Inches per Second",0.09144 , "Kilometers per Hour",1 , "Kilometers per Sec.",3600 , "Knots",1.852 , "Miles per Hour",1.60935 , "Miles per Second",5793.64 , "Speed of Light",1.07925E+09 , "Speed of Sound",1225.04

Temperatures:
DATA 8 ' number of items
' values are used as measure-pointer
DATA "Celsius [°C]",1 , "Delisle [°D]",5 , "Fahrenheit [°F]",3 , "Kelvin [K]",2 , "Newton [°N]",6 , "Rankine [°Ra]",4 , "Réamur [°Re]",7 , "Rømer [°Rø]",8

Timing:
DATA 10 ' number of items
DATA "Milliseconds",1.66667E-05 , "Seconds",0.0166667 , "Minutes",1 , "Hours",60 , "Days",1440 , "Weeks",10080 , "Fortnights",20160 , "Months",43800 , "Years",525600 , "Leap Years",527040

Volume:
DATA 12 ' number of items
DATA "Cubic Centimeters",1 , "Cubic Feet",28316.8 , "Cubic Inches",16.3871 , "Cubic Yards",764554 , "Cups (CD)",284.131 , "Fluid Ounces (CD)",28.4131 , "Gallons (CD)",4546.09 , "Gallons (US)",3785.41 , "Liters",1000 , "Milliliters",1 , "Pints (CD)",568.261 , "Quarts (CD)",1136.52

Weight:
DATA 10 ' number of items
DATA "Grams",0.00220462 , "Kilograms",2.20462 , "Ounces",0.0625 , "Ounces (troy)",0.0685714 , "Pounds",1 , "Grains",10 , "Tonnes (metric)",2204.62 , "Tons (US short)",2000 , "Long Tons (UK)",2240 , "Stones",14

TBA:
DATA 10 ' number of items
DATA "To Be Added",1 ,"",1 ,"",1 ,"",1 ,"",1 ,"",1 ,"",1 ,"",1 ,"",1 ,"",1
Attachments
DE871A5A-AF6C-4604-B865-CD7A0B8C827F.png
DE871A5A-AF6C-4604-B865-CD7A0B8C827F.png (262.94 KiB) Viewed 87 times
07EAC044-55CE-4391-B5ED-202F2BA410EC.png
07EAC044-55CE-4391-B5ED-202F2BA410EC.png (241.24 KiB) Viewed 90 times
Last edited by rbytes on Sun Nov 18, 2018 8:36 pm, edited 1 time in total.
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Re: iConvert 5.sb

Post by Dutchman » Sun Nov 18, 2018 8:31 pm

"R&D work" :idea: 8-)
There is a double sentence:
rbytes wrote:
Sun Nov 18, 2018 5:36 pm
lists will show "Not loaded". If you select that category, the two Measures lists will show "Not loaded". The solutions are to restore your internet connection if it is lost, or try again later if the site is offline.
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Re: iConvert 5.sb

Post by rbytes » Sun Nov 18, 2018 8:33 pm

I see that.
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Re: iConvert 5.sb

Post by rbytes » Sun Nov 18, 2018 8:34 pm

I see that.
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Re: iConvert 5.sb

Post by rbytes » Sun Nov 18, 2018 8:36 pm

Fixed. Solved the echo problem. :D
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Re: iConvert 5.sb

Post by GeorgeMcGinn » Mon Nov 19, 2018 8:46 am

I would like to pose another suggestion about the absence of the currency website at the time of requesting it.

Instead of showing that it is not available, I think that if you already have a prior file that the program uses the older file so long as it is not more than five days old.

The time limit is just an arbitrary time frame, as the rate that a currency exchange changes is not as drastic as one might think. So even a 10 day old file will be very close to the current exchange rate. And I believe keep in the older file and using it is just for advanced planning use by a person.

I feel that anybody using the currency feature would get a good idea of the exchange rate so long as the file is no older than five to ten days old. This way, some planning and that's what I'm using it's for can start and closer to say my trip to Canada I can re-run it that day to get the current exchange rate.

In other words if I'm planning to go to Canada and I ran the currency exchange rate five days ago, and I want to run a new dollar amount through it to see how much I will have in Canada, I would rather get an older result as an idea as exchange rate, unless a country goes to war or a country goes bankrupt and has taken over by the WFO, the exchange rate does not change change that drastically.
George McGinn
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Re: iConvert 5.sb

Post by Dutchman » Mon Nov 19, 2018 8:54 am

GeorgeMcGinn wrote:
Mon Nov 19, 2018 8:46 am
… snip
Instead of showing that it is not available, I think that if you already have a prior file that the program uses the older file so long as it is not more than five days old.
That is how it was made.
Older html downloads will be used to restore the data.
But if they are not present AND downloading fails, yes then what? :(
You can see it happen when you activate view via the setting button at the left. 8-)
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Re: iConvert 5.sb

Post by rbytes » Mon Nov 19, 2018 5:49 pm

A few weeks ago I did an online search for "how often do currency rates change?". Actually they fluctuate fairly rapidly - multiple times a day in many cases. In the Select menu, in addition to the switch for Update - View there is a second switch for Currency ID. When the switch is on, the ID becomes month, date, hour, minute (MMDDHHMM) rather than year, month, date (YYYYMMDD). That is useful for tracking changes within a day.

Does anyone see value in being able to load and save specific currency files for the purpose of comparing changes from one date to another? At present, only two files are kept and the rest are deleted automatically. But a folder could be created to keep certain files.
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Re: iConvert 5.sb

Post by GeorgeMcGinn » Sun Dec 02, 2018 9:03 pm

Hey Ricardo,

That sounds like a great idea, and I was going to mention that currently changes very frequently throughout the day. Are used to do trading in currency along time ago, including seven day trading.

But one thing I would like to suggest is that you put the year and you're an MMDDHHMM tag. Supposed to use it once on a vacation going to Canada, then I don't use it again until the next year when I plan on re-visit in Canada and the file is not available, I will get data that is almost a year-old.

And right now, or at least the version of the program that I have, I don't think it tells me what file I'm using. So unless it tells me like it used to next to the currency tag, then I won't realize how old the information is.

What I'm saying is it's got to be obviously stated how old the day there is if you can't retrieve it.

Dutchman – yeah I encountered the unavailability of the file when I first ran it and the program crashed or I think it said something like file not found, so I know that much. I was just concerned if you couldn't find the file what did you use and that has been answered here. Thanks for bringing that up, as it was an important point.

rbytes wrote:
Mon Nov 19, 2018 5:49 pm
A few weeks ago I did an online search for "how often do currency rates change?". Actually they fluctuate fairly rapidly - multiple times a day in many cases. In the Select menu, in addition to the switch for Update - View there is a second switch for Currency ID. When the switch is on, the ID becomes month, date, hour, minute (MMDDHHMM) rather than year, month, date (YYYYMMDD). That is useful for tracking changes within a day.

Does anyone see value in being able to load and save specific currency files for the purpose of comparing changes from one date to another? At present, only two files are kept and the rest are deleted automatically. But a folder could be created to keep certain files.
George McGinn
Computer Scientist/Cosmologist/Writer/Photographer
Member: IEEE, IEEE Computer Society
IEEE Sensors Council & IoT Technical Community
American Association for the Advancement of Science (AAAS)
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