In this section we deal with various methods to extract different parts of text from lists and other text and at the end, how to put it all together to make a new text string. This is sort of lengthy, but it is pretty easy to follow,
First, to extract text from a list. Both of these result in the text “Computer”:
set theTextList to {"Apple", "Computer"} as list
last item of theTextList
last text item of theTextList --> both statements yield 'Computer'
And then using the ‘reverse’ keyword:
set theTextList to {"Apple", "Computer", "Inc"} as list
last text item of theTextList --> yields "Inc"
set theTextList to reverse of theTextList --> yields {"Inc", "Computer", "Apple"}
last text item of theTextList --> yields "Apple"
As you can see, the keyword ‘reverse’ changes the order of items in a list.
If we want to extract a specific word:
set theTextString to "Apple Computer, Inc"
set theAppleString to word 1 of theTextString
display dialog theAppleString --> yields "Apple"
If we want to extract a specific paragraph:
set theTextString to "Apple Computer, Inc" & return & "Home of Mac OS X"
set theAppleString to paragraph 2 of theTextString
display dialog theAppleString --> yields "Home of Mac OS X"
Extracting by numerical index:
set theTextString to "Apple Computer"-1 is the index for the last letter of the text string, no matter how long the string is; a lot easier than having to determine how long the string is every time!
set computerStringStart to offset of "Computer" in theTextString
display dialog computerStringStart --> yields 7: position of first letter in the word 'Computer'
set computerText to (text computerStringStart thru -1 of theTextString)
display dialog computerText --> yields 'Computer'
The same as saying:
set computerText to (text 7 thru -1 of theTextString)
Of course, if we wanted to, we could say:
'set computerText to (text 7 thru 14 of theTextString)' but why?
set theTextString to "Apple Computer"
set theAppleString to text 7 thru -2 of theTextString
display dialog theAppleString --> yields 'Compute'-2 gets the numeric index of the letter in 'Computer' that is 2 from the end.
set theTextString to "Apple Computer, Inc"
set theAppleString to text 1 thru -1 of theTextString
display dialog theAppleString --> yields: "Apple Computer, Inc"
set theTextString to "Apple Computer, Inc"
set theAppleString to (words 1 thru -1 of theTextString) as text
display dialog theAppleString --> yields "AppleComputerInc"
set AppleScript's text item delimiters to ","
set theTextString to "Apple Computer, Inc"
set theAppleString to (text items 1 thru -2 of theTextString) as text
display dialog theAppleString --> yields "Apple Computer"
The following would give the same result:
set AppleScript's text item delimiters to ","
set theTextString to "Apple Computer, Inc"
set theAppleString to (text item 1 of theTextString) as text
display dialog theAppleString
Why? Because with ‘set AppleScript’s text item delimiters to “,”‘ , what is found before a comma is a text item and what is after a comma is another text item – this can be very useful.
Look at this:
set AppleScript's text item delimiters to " "
set theTextString to "Apple Computer, Inc"
set theAppleString to (text item 1 of theTextString) as text
display dialog theAppleString --> this yields "Apple", because the space determines the value of text items.
set AppleScript's text item delimiters to " "
set theTextString to "Apple Computer, Inc"
set theAppleString to (text item 2 of theTextString) as text
display dialog theAppleString --> this yields "Computer,", because the space determines the value of text items.
This illustrates how to concatenate some text to display a dialog:
set AppleScript's text item delimiters to " "
set theTextString to "Apple Computer, Inc"
set theAppleString to (text item 1 of theTextString) as text
–> the result is “Apple”, because the space determines the value of text items.
set theComputerString to (text 1 thru -2 of text item 2 of theTextString) as text
–> the result is “Computer”, because the space determines the value of text items and ‘text 1 thru -2′ eliminates the comma.
Now we can put it all together:
set dialogString to "Too bad all " & theComputerString & "'s aren't " & theAppleString & "s!"
display dialog dialogString with icon note buttons {"No Doubt"} default button {"No Doubt"} giving up after 5
Contact me if you have any questions or comments at: hyperscripter@gmail.com or http://twitter.com/hyperscripter or to subscribe, click the By Email link at the top of the page.
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