Re: [xsl] an expression to check if a parameter is a non-zero number - comments

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Abhishek,

At 01:33 PM 10/30/2003, you wrote:
> <xsl:when
> test="true(string-length(translate($ImageWidth,'0123456789.','')) = 0
> and $ImageWidth != 0)">
>
> I want to check if the incoming parameter ImageWidth is a non-zero
> number.
>
> I am wondering it the above expression would work?

Take it out of the spurious true() function, and it should, but....

(There is a function true() but it doesn't take any arguments, it simply 
returns the Boolean value "true").

> Is there a better way to do that checking ?

Try test="number($ImageWidth)"

If $ImageWidth is a number, it'll test as true unless its value is 0.

If $ImageWidth is a string, it'll be turned into a number by the number() 
function, and test as true unless it is 0 or NaN ("not-a-number").

If $ImageWidth is a node-set, the first node in it will be converted into a 
string, and test as above. Same if it's a result-tree-fragment.

If $ImageWidth is a Boolean, it'll be true if it's true, false if not.

Cheers,
Wendell


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
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