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error 404 exists | revDocs | RunRev
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Product Edition
Version
exists
Basics
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Type
Function
Syntax

exists(object)

Introduced
1.0
Environment
Desktop, Web and Server
Platform Support
MacOS,Mac OS X,Windows,Linux
Security
None required
Summary
Returns true if the specified object exists, false if it does not.
Examples

exists(card field 1)
txst st "t " " d" dr drrdrrerresres"es")

Additional Comments
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Use the exists function to make sure an object exists before you try to perform an action on it, or to determine whether to create an object.

Parameters:

The object is any object reference.

Value:

The exists function returns true or false.

Comments:

To find out whether any of a certain type of object exist, use the exists function with the number 1. For example, exists(image 1) returns true if there are any images on the current card, and false otherwise.

You can also specify a chunk of a container, but in this case the exists function always returns true.

Tip: To find out whether a file or folder exists, or whether a process is running, use the there is a operator.

User Comments
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