PageWidth how to assign a value to a variable?

menglv · Post by **menglv** » Tue Mar 11, 2014 8:13 am

PageWidth how to assign a value to a variable?

How to use PageWidth variable in JavaScript?

freddyp · Post by **freddyp** » Tue Mar 11, 2014 12:13 pm

var pageWidth = job.getVariableAsNumber("[Stats.PageWidth]");

menglv · Post by **menglv** » Wed Mar 12, 2014 12:29 am

Really worked, thank you very much.

menglv · Post by **menglv** » Wed Mar 12, 2014 2:27 pm

var re =job.getPath();

re=re.mid(0,re.findRev("/")) + "/"+job.getName();

var curFileStats = new FileStatistics(re);

currentbook = curFileStats.getNumber("PageWidth");

why can't work?

dkelly · Post by **dkelly** » Wed Mar 12, 2014 2:59 pm

Is your job a file or folder?

menglv · Post by **menglv** » Thu Mar 13, 2014 12:37 am

dkelly wrote: Is your job a file or folder?

my job is a file.

menglv · Post by **menglv** » Thu Mar 13, 2014 4:05 am

how to use function FileStatistics?

dkelly · Post by **dkelly** » Thu Mar 13, 2014 3:47 pm

If your job is a single file use:

var curFileStats = new FileStatistics(job.getPath());

currentbook = curFileStats.getNumber("PageWidth");

menglv · Post by **menglv** » Sun Mar 16, 2014 1:08 am

dkelly wrote: If your job is a single file use:

var curFileStats = new FileStatistics(job.getPath());

currentbook = curFileStats.getNumber("PageWidth");

I tried, but without success.

Can you give me an example of flow?

test.sflow

dkelly · Post by **dkelly** » Tue Mar 18, 2014 2:34 pm

Your script doesn't follow the example I gave. You are not using the FileStatistics variable curFileStats to retrieve the PageHeight.

menglv · Post by **menglv** » Thu Mar 20, 2014 5:39 am

dkelly wrote: Your script doesn't follow the example I gave. You are not using the FileStatistics variable curFileStats to retrieve the PageHeight.

return value：undefined

menglv · Post by **menglv** » Sat Mar 22, 2014 1:45 am

dkelly wrote: Your script doesn't follow the example I gave. You are not using the FileStatistics variable curFileStats to retrieve the PageHeight.

return value：undefined

Does anyone know what is the reason?

freddyp · Post by **freddyp** » Mon Mar 24, 2014 2:18 pm

The return value of a script expression is the "last" variable on a line of its own.

var result = "1";

result;

If the script expression is more than just one or two lines I recommend to structure it as follows: create a function that returns a value and call that function on the last line of your script expression. You do not have to do it like this, but it is generically applicable.

function someFunction(par1, par2)

{

var returnValue;

//perform stuff that gives returnValue the correct value

return returnValue;

}

someFunction("first parameter",second_parameter);

Freddy

menglv · Post by **menglv** » Tue Mar 25, 2014 6:50 am

freddyp wrote: Freddy

Theresult of this variable is not important, the key is currentbook which returned the result is undefined. I want this currentbook value equals pdf's PageHeight.

freddyp · Post by **freddyp** » Tue Mar 25, 2014 2:36 pm

Then just write

currentbook;

as the last line of your script expression. I thought that was clear from the explanation.

Freddy