Sannyasin Brahmanathaswami wrote:
> (rough draft code)
>
> Local sTempParamArray # may good to save a local,
>
> Command saveTempParams
>
> Put fld "fuelNeed" into pTempParamArray["fuelNeeded'}
> Put fld "timeToArrival" into pTempParamArray["timeToArrival""
> # etc.
> Put pTempParamArray into sTempParamArray
> storeTempParams pTempParamArray
>
> End saveTempParams
>
> command storeTempParams pTempParamArray
>
> put specialFolderPath("documents") & "/tempSavedParams" into
tSavedPath
> put sTempParamArray into url ("binfile:" & tSavedPath)
>
> end storeTempParams
A good outline, but missing a key step: arrays are collections of
pointers and in their native form are not a contiguous bytestream, so
attempting to write one to disk directly with yield an empty file.
This is where serialization comes in, collecting all the disparate
pointer contents and packing them into a bytestream that can be saved or
transported, using arrayEncode:
command storeTempParams pTempParamArray
put specialFolderPath("documents") & "/tempSavedParams" into \
tSavedPath
put arrayEncode(sTempParamArray) into url ("binfile:" & tSavedPath)
end storeTempParams
And because arrayDecode will throw a fatal error if you attempt to use
it with anything other than actual LSON data, we can't just check "the
result" afterward; better to wrap it in a try/catch:
Function getTempSavedParams
Put specialFolderPath("documents") & "/tempSavedParams" into \
tSavedPath
put url ("binfile:" & tSavedPath) into pTempParamArray
-- Always check I/O for errors:
if the result is empty then
return "Error in getTempSavedParams: "& the result for error
end if
-- Try as LSON:
try
put arrayDecode(pTempParamArray) into pTempParamArray
catch tErr
return "Not a valid array file: "& tSavedPath for error
end try
--
return pTempParamArray
end getTempSavedParams
--
Richard Gaskin
Fourth World Systems
Software Design and Development for the Desktop, Mobile, and the Web
____________________________________________________________________
ambassa...@fourthworld.com http://www.FourthWorld.com
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