Hey Bob,
there's a problem in directoryListingToArray in some cases.
Wen I run it on my home directory, I get an error message
...: execution error at line 119 (repeat: error in statement), char 1
The 'repeat' error is misleading - that's just the line following the
'do tCommand'.
It's caused because I have a file (I think created by Dropbox - but I'm
not sure) which contains a control character (specifically,
numtochar(13)) in its name. (it urlencodes to .../Dropbox/Icon%0D)
When this gets to your "do" command, it causes Livecode to stop with an
error report, because the embedded "CR" gets the parser confused.
You can 'fix' it by adding
replace numtochar(13) with "%0D" in tPath
at the appropriate place - but it's not clear if that's just storing up
problems for the future.
(Just another reason to avoid 'do', and go with Ben's recursive solution
straight into an array rather than getting a list and converting it. But
if you do have a reason to convert a list, then you could come up with a
way to do that without 'do' using a similar method to Ben's)
Alex.
On 03/02/2020 17:19, Bob Sneidar via use-livecode wrote:
I already wrote some functions to do this but sent them to Richard in a demo
stack. Here is the code based on directoryListing, which I believe is in the
MasterLibrary. I made a minor adjustment to it if I recall. DirectoryListing
was returning duplicate paths for each unique folder for some reason. I
modified it to only return one unique path for a given folder.
Setting the arrayData of a tree widget to the returned value of
directoryListingToArray() function will yield the results you want.
...
function directoryListingToArray pDirectoryList
put line 1 of pDirectoryList into tRoot
delete line 1 of pDirectoryList
set the itemDelimiter to "/"
put empty into aArrayData [tRoot]
repeat for each line tPath in pDirectoryList
replace tRoot with empty in tPath
put "[" & quote before tPath
put quote & "]" after tPath
replace "/" with quote & "]" & space & "[" & quote in tPath
put "[" & quote & tRoot & quote & "] " before tPath
put "put empty into aArrayData " & tPath into tCommand
do tCommand
end repeat
return aArrayData
end directoryListingToArray
Bob S
On Feb 1, 2020, at 13:16 , Dick Kriesel via use-livecode
<use-livecode@lists.runrev.com> wrote:
On Jan 22, 2020, at 10:17 AM, Richard Gaskin via use-livecode
<use-livecode@lists.runrev.com> wrote:
I stumbled across a code challenge for y'all, one that seems seductively simple
but I don't think it is:
What is the simplest way to build an array that reflects the files and folders
within a given folder?
There's a discussion about this here:
https://forums.livecode.com/viewtopic.php?f=7&t=33565
On Jan 22, 2020, at 10:26 AM, Richard Gaskin via use-livecode
<use-livecode@lists.runrev.com> wrote:
We have many handlers that deliver directory trees as lists, but arrays are a different
beast. Because the depth is both unknowable and varied, I can't think of a way to do
this without resorting to "do".
Since that thread vanished last week, and hasn’t returned, I'm offering help
here instead.
The list of full paths contains enough information to build an array
representation of the directory tree.
<code>
/**
Summary: Given a list of full paths, and given the partial path they share,
build an array representing the directory structure
pPaths: a return-delimited list of full paths
pPath: the path that was used to generate the list of full paths
Returns (array): A array with a branch node for each folder and a leaf node for
each file
Description: Eliminate pPath from every line of pPaths. Then insert each line
into an array.
email subject "directory tree -> array"
forum topic "f=7&t=33565"
*/
function arrayFromPaths pPaths, pPath -- a list of full paths, and the path
that was used to generate the list
local tPaths, tFile, tArray
set the itemDelimiter to "/"
put char 2 to -1 of replaceText( cr & pPaths, cr & pPath & slash, cr ) into
tPaths -- eliminate pPath from every full path
repeat for each line tPath in tPaths -- insert each file name into the array
put the last item of tPath into tFile
delete the last item of tPath
if tPath is empty then -- the file is in folder pPath
put "true" into tArray[ tFile ]
else -- the file is in a folder in folder pPath
split tPath by slash
put "true" into tArray[ tPath ][ tFile ]
end if
end repeat
return tArray
end arrayFromPaths
on mouseUp
local tPaths = "a/b/c,a/b/d/e,a/b/d/f" -- folder a/b contains file c and folder
d, which contains files e and f
local tPath = "a/b" -- the shared partial path
replace comma with cr in tPaths
get arrayFromPaths( tPaths, tPath )
breakpoint
end mouseUp
</code>
If the topic reappears soon, I’ll repost there because reading code is easier
there.
By, the way, thanks to RG for the bug report on my earlier posting in the
now-vanished thread.
— Dick
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