AppleScript 2.0 in Mac OS X Leopard is a significant release with important updates and modifications, including: full Unicode support, new intrinsic application properties and constructs, new scriptable system preferences, and much more.
New for AppleScript in Mac OS X v10.5Unicode Support
AppleScript is now entirely Unicode-based. Comments and text constants in scripts may contain any Unicode characters, and all text processing is done in Unicode, so all characters are preserved correctly regardless of the user’s language preferences. For example, this script works correctly in AppleScript 2.0, where it would not have in previous versions: Virtualbox for mac high sierra.
set theJapanese_phraseto '日本語'
set theRussian_phraseto 'Русский' set thenew_phraseto theJapanese_phrase & ' and ' & theRussian_phrase --> returns: '日本語 and Русский'
There is no longer a distinction between Unicode and non-Unicode text. There is exactly one text class, named “text”: that is, class of 'How now brown cow' returns text. It is functionally equivalent to the former Unicode text class, so it may contain any Unicode character, and has two new features: Applejack for mac os sierra.
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Mac Os X Leopard DownloadCompatibility
For compatibility with pre-2.0 AppleScript, string and Unicode text are still defined, but are considered synonyms for text. For example, all three of these statements have the same effect:
some_verbageas text
some_verbageas string some_verbageas Unicode text
In addition, text, string, and Unicode text will all compare as equal. For example, class of 'how now brown cow' is string is true, even though class of 'how now brown cow' returns text. It is still possible for applications to distinguish between the three different types, even though AppleScript itself does not.
Now that AppleScript preserves all characters correctly worldwide, it is also stricter about the text used in scripts. AppleScript syntax uses several non-ASCII characters, such as “≠” and “¬”. These characters must be typed exactly as the AppleScript Language Guide for AppleScript 1.3.7 describes. For compatibility with Asian national encodings, “《” and “》” are allowed as synonyms for “«” and “»”, since the latter do not exist in some Asian encodings.
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Because AppleScript 2.0 scripts store all text as Unicode, any text constants count as a use of the former Unicode text class, which will work with any version of AppleScript back to version 1.3. A script that contains Unicode-only characters such as Arabic or Thai will run, but will not be correctly editable in any version of Mac OS or Mac OS X older than Mac OS X 10.5: the Unicode-only characters will be lost.
Use of the new id property requires AppleScript 2.0.
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