Testing if a Value is a Key / GUID

[Love Zhaoying]

Is the information at https://wiki.secondlife.com/wiki/Category:LSL_Key still valid?

Quote:

To test for a valid key, just do this:

if(uuid){ //do something }

I am coding for a situation where:

if (value is a GUID) {

Do stuff

}

else if (value is type ISON_OBJECT) {

Do different stuff

}

else { // Not GUID or JSON_OBJECT

Do yet different stuff

}

 

[Quistess Alpha]

Yup, but it only works if the type of the value is key. As per the wiki on the if statement:

Quote

[value type: (key) is] True only if it is a valid key and not NULL_KEY.

https://wiki.secondlife.com/wiki/If

Edited February 9, 2023 by Quistess Alpha

[Rick Nightingale]

Yes - that's what I do. You can also typecast a string

if ((key)my_string_variable)... works

 

[Love Zhaoying]

1 minute ago, Quistess Alpha said:

Yup, but it only works if the type of the value is key. as per the wiki on the if statement:

Quote

[value type: (key) is] True only if it is a valid key and not NULL_KEY.

https://wiki.secondlife.com/wiki/If

That's the point of my question, I think..

I get a new Key/GUID from llGenerateKey() (https://wiki.secondlife.com/wiki/LlGenerateKey).

Even if the Key/GUID returned from llGenerateKey() is not the Key "of something in Second Life", do you think the if(key) test should always succeed?

 

 

 

[Love Zhaoying]

1 minute ago, Rick Daylight said:

Yes - that's what I do. You can also typecast a string

if ((key)my_string_variable)... works

 

In this case, I probably need DO to type-cast it..since the variable I am testing is a String and not a key-type..oops! Thanks!

[Rick Nightingale]

It should... I doubt the function actually looks up the key in the database. It's just a valid format and not null.

[Quistess Alpha]

18 minutes ago, Love Zhaoying said:

Even if the Key/GUID returned from llGenerateKey() is not the Key "of something in Second Life", do you think the if(key) test should always succeed?

Yes, as long as llGenerateKey() doesn't fluke and return NULL_KEY,

if(llGenerateKey()){/*always executes*/}else{/*never executes*/}

 

[Love Zhaoying]

1 minute ago, Quistess Alpha said:

Yes, as long as llGenerateKey() doesn't fluke and return NULL_KEY,

If it does, we're all screwed - SL ran out of GUID's!!!

What next?!?? IP Addresses??!

..Is joke!

[Anna Salyx]

1 hour ago, Love Zhaoying said:

If it does, we're all screwed - SL ran out of GUID's!!!

What next?!?? IP Addresses??!

..Is joke!

on the realistic side, for those who might be curious (because I was at one time in the past): Version-4 UUIDs, which are totally random, have approximately 5.3 x 10³⁶ possible values. This number is so large that if you were to generate 1 billion UUIDs per second for 85 years you have a 50% chance of creating a duplicate.   Granted, Second Life uses Version-5 UUIDs which are not truly random, but I can safely extrapolate that the number of keys is comparatively the same.