On Mon, 15 Dec 2003, Tom Jackson wrote:
> I'm trying to see if a value is an integer, using:
>
> if {[string is integer "${var}"]} {
> do something
> }
>
> When var is the empty string it returns true, so I have to use:
>
> if {!("" eq "${var}) && ...
>
> Is this a bug, or expected behavior?
This is expected behavior. What you want is:
[string is integer -strict $var]
All of the [string is] commands return true for the empty string, unless
the -strict flag is given.
Michael
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