pdf » combine(path,fileFilter,saveTo)
Description
This command instructs Nexial to find a list of PDF files in path that matches the specified fileFilter, and then
combine these PDF files into a single PDF file named as saveTo.
Th filterFilter parameter can be expressed in one or more of the following:
- The exact file name such as MyDocument.txt
- The conventional wildcard file pattern such as *.logora*.json
- file name (use name match ....)
- file size in bytes (use size > ...orsize < ...).
- file’s last modified date (use lastmod > ...orlastmod < ...). This matches the last modified date/time of a file as timestamp (i.e. epoch).
Additionally, fileFilter may be expressed as Nexial Filter to create a multi-criteria
filter on name, size and/or lastMod. For example,
name end with saveMatches4.json & size = 0 & lastMod >= 1547394418
…means “match on files where 
    - the file name ends with saveMatches4.json, 
    - has no byte (i.e. empty file) and 
    - was last modified since January 13, 2019 3:46:58 PM”
Note: In order to distinguish between “exact match” and “filter match”, please observe the following rules:
The “filter match” is expected to contain space(s) between the keywords (like
name,size, andlastMod) and the corresponding criteria.
For example, name = saveMatches4.json will return the file with name saveMatches4.json. But name=saveMatches4.json 
will return the file with name name=saveMatches4.json
The saveTo parameter should be a fully qualified location of the combined PDF file.
Parameters
- path - the location to scan for PDF files
- fileFilter - the filter to apply on pathwhen searching for candidate PDF files.
- saveTo - the location to save the combined PDF file.