[Freeswitch-users] NOT in dialplan expression

[Leon de Rooij]

Hi,

Negating is done with [^...] in a regex, so 'not 1' is matched with:

/^[^1]$/

If you want to match on a longer sequence, you can do that with  
negative lookahead, for example 'not 123' can be matched like this:

/^(?!123$)\d{3}$/

regards,

Leon


On Oct 21, 2009, at 1:34 PM, Mark Campbell-Smith wrote:

> Hi!
>
> How do I do a NOT equal to in a dialplan expression
>
> Normaly in regex I would use the ! character.  This doesn't seem to  
> work in FS..
>
> ie
>      <condition field="${variable}" expression="!^1">
>
> Shouldn't that match when the variable is not starting with one?
>
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