exists
Type
function
Summary
Returns true if the specified object exists, false if it does not.
Syntax
exists(<object>)
Description
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.
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.
To find out whether a file or folder exists, or whether a process is running, use the there is a operator.
Parameters
| Name | Type | Description |
|---|---|---|
object | Any object reference. |
Examples
exists(card field 1)
exists(button "OK" of card "Preferences")
Related
control structure: function
function: isNumber
glossary: folder, current card, return, process, object
keyword: file
object: image
operator: there is a, there is no
property: owner
Compatibility and Support
Introduced
LiveCode 1.0
OS
mac
windows
linux
ios
android
Platforms
desktop
server
mobile