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Re: exists ... index 0 returns true
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Re: exists ... index 0 returns true


  • Subject: Re: exists ... index 0 returns true
  • From: kai <email@hidden>
  • Date: Wed, 7 Sep 2005 00:45:24 +0100


On 6 Sep 2005, at 03:03, Shane Stanley wrote:

On 6/9/05 11:52 AM, "Matt Neuburg" <email@hidden> wrote:


tell application "TextEdit"
    tell document 1
        exists word 0 -- true
    end tell
end tell

I regard this as a bug.


Interestingly, it returns false if the document contains no words.

Apparently, the issue goes even further.

The document used to get the following results contained a single paragraph: "Wot, no error number -1728?":

----------------

tell application "TextEdit"
    tell document 1

characters 0 thru 27
--> {"W", "o", "t", ",", " ", "n", "o", " ", "e", "r", "r", "o", "r", " ", "n", "u", "m", "b", "e", "r", " ", "-", "1", "7", "2", "8", "?"}


characters 0 thru 28 (* or more *)
--> Error number 1: "NSReceiverEvaluationScriptError: 4" (at least it errors)


        words 0 thru 5
        --> {"Wot", "no", "error", "number", "1728"}

words 0 thru 7 (* or more *)
--> {"Wot", "no", "error", "number", "1728", missing value, missing value}


        paragraphs 0 thru 1
        --> {"Wot, no error number -1728?"}

paragraphs 0 thru 3 (* or more *)
--> {"Wot, no error number -1728?", missing value, missing value}


    end tell
end tell

----------------

Some of this seems symptomatic of general behaviour in Cocoa - at least in terms of element 0 being considered the same as element 1. For example:

----------------

tell application "TextEdit"

    window 0
    --> window id 659 of application "TextEdit"

    window 1
    --> window id 659 of application "TextEdit"

    windows 0 thru 1
    --> {window id 659 of application "TextEdit"}

end tell

----------------

tell application "Mail"

    window 0
    --> window id 554 of application "Mail"

    window 1
    --> window id 554 of application "Mail"

    windows 0 thru 1
    --> {window id 554 of application "Mail"}

end tell

----------------

tell application "Safari"

    window 0
    --> window id 357 of application "Safari"

    window 1
    --> window id 357 of application "Safari"

    windows 0 thru 1
    --> {window id 357 of application "Safari"}

end tell

----------------

However, in iTunes (which I believe is a Carbon app), the results are quite different:

----------------

tell application "iTunes"

    window 0
    --> error number -1728: "iTunes got an error: Can't get window 0."

    window 1
    --> browser window id 531 of application "iTunes"

windows 0 thru 1
--> error number -1728: ""iTunes got an error: Can't get windows 0 thru 1."


end tell

----------------

---
kai


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 >Re: exists ... index 0 returns true (From: Shane Stanley <email@hidden>)

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