Apple

This is a very interesting, yet confusing subject.

I just reread this:

Reference Forms from the AppleScript Language Guide, which I found very helpful.

Here is one section very relevant to our discussion here:

Filter

Specifies all objects in a container that match a condition, or test, specified by a Boolean _expression_.

The filter form specifies application objects only. It cannot be used to filter the AppleScript objects list, record, or text. A term that uses the filter form is also known as a whose clause.

. . .

Within a test in a filter reference, the direct object is the object being tested. Though it isn’t generally needed, this implicit target can be specified explicitly using the keyword it, which is described in The it and me Keywords.

The following example shows several equivalent ways of constructing a filter reference to find all the files in a folder that whose name contains the word “AppleScript”. While the term it refers to the Finder application outside of the filter statements, within them of it refers to the current file being tested. The result of each filter test is the same and is not changed by including or omitting the term of it:

tell application "Finder"

    it --result: application "Finder" (target of tell statement)

    set myFolder to path to home folder

        --result: alias "Leopard:Users:myUser:"

    files in myFolder --result: a list of Finder document files

    files in myFolder where name of it contains "AppleScript"

    (* result: document file "AppleScriptLG.pdf" of folder "myUser"

        of folder "Users" of startup disk of application "Finder"}*)

    files in myFolder where name contains "AppleScript" -- same result

    every file in myFolder whose name contains "AppleScript" -- same result

    every file in myFolder where name of it contains "AppleScript"

        -- same result

end tell

Also, note that from The it and me Keywords. , "its" is a synonym for "of it".

The key point for our discussion is:

The result of each filter test is the same and is not changed by including or omitting the term

of
 it

So, doesn't that mean that "whose <property>" and "whose its <property>" and "whose <property> of it" are all equivalent?

Best Regards,

Jim Underwood

aka JMichaelTX

References:
	>"where its" vs "whose" (From: Mitchell L Model <email@hidden>)
	>Re: "where its" vs "whose" (From: Axel Luttgens <email@hidden>)
	>Re: "where its" vs "whose" (From: Deivy Petrescu <email@hidden>)