Re: How to evade using globals in an if block

[Stephen Irons <stephen.irons@...>]

function Test_Read_Only_Properties(nDocID, strNoteID)
 
 	local nReadOnlyNote = Nc_Note_Flag_ReadOnly_Get(nDocID, strNoteID)
	local nReadOnlyDoc = Nc_Doc_ReadOnly_Get(nDocID)

	-- Declare these as locals

	local strMessage
	local bTerminate
 

	if nReadOnlyNote == 0 and nReadOnlyDoc == 0 then
		strMessage = "" -- both read/write
		bTerminate = false

	end
 
	if nReadOnlyNote == 0 and nReadOnlyDoc == 1 then
		strMessage = "ERROR:  The document is read-only. Cannot make requested change(s). Terminating script. To proceed, open the Document Properties dialog and change its read-only setting. Then try again."
		bTerminate = true	
	end
 
	if nReadOnlyNote == 1 and nReadOnlyDoc == 0 then
		strMessage = "ERROR:  The note is read-only. Cannot make requested change(s). Terminating script. To proceed, open the Note Properties dialog and change its read-only setting. Then try again."
     		bTerminate = true	
	end
		  
	if nReadOnlyNote == 1 and nReadOnlyDoc == 1 then
		strMessage = "ERROR:  Both the document and note are read-only. Cannot make requested change(s). Terminating script. To proceed, open the Document Properties dialog and change its read-only setting. Open the Note Properties dialog and change its read-only setting. Then execute the script again."
		bTerminate = true	
	end
 
 return strMessage, bTerminate
 
end --  function
 

On 24 August 2014 15:05, Paul Merrell <marbux@gmail.com> wrote:

Hi, all,

After a couple of years now, I think I'm approaching an understanding
of Lua's variable scoping. But where I'm still at sea is in evading
the use of globals in an if block or loop inside a function. I feel
like I'm missing something basic. An example at
<https://gist.github.com/Marbux/961d5aa3244993e42cae>, which executes
but is a work in progress.

A function begins at line 43 and a series of if blocks at line 48.
The variables within each if block are globals. How might I refactor
my function so that the same variables are locals, if possible.

I've been working around this kind of problem by declaring the globals
as nils in the global environment. See function test at line 79. But
particularly with functions shared by multiple scripts, I'd like to
find a way around that.
'
Hopefully, this is just my ignorance showing. I'll appreciate any
enlightenment here.

Best regards,

Paul

Best regards,

Paul




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