NULL KEY

From Second Life Wiki
Jump to navigation Jump to search

Description

Constant: string NULL_KEY = "00000000-0000-0000-0000-000000000000";

The string constant NULL_KEY has the value "00000000-0000-0000-0000-000000000000"

While technically a string constant, it is only useful as a key.

Despite fitting the syntax criteria to be a valid key, when fed to a Conditional as a key it executes as false.

In most applications NULL_KEY isn't needed; an empty string will suffice.

Related Articles

Functions

•  llAvatarOnSitTarget
•  llDetectedKey
•  llGetNotecardLine
•  llGetLandOwnerAt
•  llGetPermissionsKey
•  llGetTexture
•  llListen

Events

•  attach

Examples

<lsl> integer isKey(key in) {

   if(in) return 2;
   return (in == NULL_KEY);

}//returns 2 if it's a valid key, 1 if it's NULL_KEY </lsl>

Notes

Like any LSO string constants longer then 3 characters and used in multiple places in the code, they should be stored in a global variable. The result will be a considerable memory savings. This does not apply to scripts compiled with Mono. See LSL Constants vs Globals for more information about this and examples.
test

Deep Notes

Search JIRA for related Issues

Signature

string NULL_KEY = "00000000-0000-0000-0000-000000000000";