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Archive: Development

Make It Easy on Yourself

Kas Thomas

One of the things that makes JavaScript such a powerful, easy-to-use language is its relaxed data-typing. But sometimes, you NEED a number to be a number. New Planet PDF columinist Kas Thomas gives you the insight into a host of JavaScript tricks to perform variable type conversions.

Developer   September 20, 2001

Tips for Writing Reliable Code

Kas Thomas

Kas Thomas shares a few work habits and practices that will help you write better code--assuming, of course, that you already know at least the basics of programming!

Developer   August 23, 2001

Using Colors in Acrobat JavaScript

Kas Thomas

Kas offers a crash course in manipulating color in PDF files.

Developer   August 05, 2001

Save Yourself Some Typing with 'With'

Kas Thomas

One trick I've learned (the hard way) for reducing the number of bugs in my JavaScript is to make use of any and all tools and techniques for cutting down on the amount of typing I have to do. Kas unveils new 'secret weapon' against typos.

Developer   August 05, 2001

Image Mapping in PDF - Create a JavaScript Color Picker

Kas Thomas

Kas presents an exercise on how to set up an image map in a PDF file and couple it to a Perl script running on a server, creating an RGB color picker as an example.

Developer   August 05, 2001

The Trouble with 'this'

Kas Thomas

Kas is always looking for ways to improve his -- and your -- script-writing skills and practices. He's got another shortcut that will cut down on your keystroking, and thus lessen the chance for the dreaded Script Typo.

Developer   July 20, 2001

Popping an Alert - How it's done

Kas Thomas

Kas shares with us an efficient way of popping windows-based messages from within PDF documents.

Developer   July 20, 2001

Numerical Methods and ASCII in AcroJS

Kas Thomas

The (disturbing) subject of bugs in Acrobat, and points out one problem that could very well cause you grief if you ever try to do any numerical operations on character values in strings.

Developer   July 20, 2001

Fields That Trigger Fields - The watch() method

Kas Thomas

The watch() method, although present in Acrobat JavaScript, doesn't work correctly (at least under Acrobat 4.05 for Mac). It causes the property that's being "watched" to become undefined.

Developer   July 20, 2001

What Good Is 'this'? - The object reference parameter

Kas Thomas

Kas tells you how to get rid of the object reference parameter "this", the advantages and drawbacks of using it in various contexts.

Developer   July 18, 2001

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Adding a PDF Stamp Comment

OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.