What is the meaning of !current.comments.changes() ?

[Amit Rao]

Hello Experts,

In my instance one of BR there is condition 'current.watch_list.changes() && !current.comments.changes()'
I understand that changes()  is GlideElement method.
I want to know what is the meaning of !current.comments.changes() 
Does it mean current comments changes or not changes?
And why we put ! (exclamation) before current.anyField.changes() ?

Help will be appreciated 🙂 

[Jaspal Singh]

Hi Amit,

It would mean 'Comments' does not change. Adding an '!' would negate the condition.

So, the above would function only if the

comments for current record does not change &

watchlist changes

[Anurag Tripathi]

Hi,

! is the NOT operator. Using it in any such condition reverses the condition

For eg

if i have to check whether x is not equal to 5, i can to it as

x !=5 OR !(x==5)

Both will work the same.

In your example it is checking for comments NOT changing.

Hope this helps.

-Anurag

[asifnoor · Accepted solution]

Hi,

Whenever you want to negate a condition, you use ! before the condition.

In your case, !current.comments.changes() means comments NOT changing.

the BR will work only when watch list changes but no comments added.

Kindly mark the comment as a correct answer and helpful if it helps to solve your problem.

Regards,
Asif
2020 ServiceNow Community MVP