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I am trying to write substantial algorithms in postscript and finding it hard going. There are two questions inherent in this post. First, how can I solve the problem. Second, rather than just giving me the answers, is there any decent way of stepping through postscript code so I can debug it...

I don't have an answer to your particular problem, but I think it's not the best design approach in the first place. Access is not a very good database, so putting lots of images in it doesn't seem like a very good idea. Instead, I'd suggest storing the name of the image in access, and having...

clarification and correction: The above example shows a subroutine call where I pass in a URL, read it, get the resulting text, skip until the first pattern is found, take everything until the last pattern is found, and in between, for each line extract according to a rule and pull the pieces...

No, that's not really using the dynamic capture of the pattern. You're not really even using the parens. Here's an example of what I want: splitAfterPattern("http://waterdata.usgs.gov/" . "nwis/uv?dd_cd=07&format=rdb&period=2&site_no=01407081", "^5s\s+", "(\d*.\d+)\s+(\d+)\s+(\w+)"...

I want to write a generic web extraction subroutine in perl. To do so, I want to: 1. find the first pattern (easy) 2. toss everything before it (easy) 3. iteratively find successive occurrences of a patten of interest (easy) Then comes the hard part. Given an arbitrary pattern containing...

Hello, I thought I understood stack programming until I tried postscript. I cannot seem to pass parameters to a named function and get back a result, as in the following example (tested on ghostscript) any help? 0 0 1 setrgbcolor /average {add 2 div} def newpath { 50 150 average % this...