newlisp tutorial 5

This fifth tutorial covers four newLISP topics that could improve your VisualNEO application. A. Test data again In Tutorial 2 we put attention to predicates. Predicates are used to test data. Two functions are not categorized under Predicates (www.newlisp.org/downloads/manual_frame.html), but they are very useful: exists and for-all. 1. exists (setq mc-list ‘(2 “reinier” 1 “hello” […]

NewLisp for VisualNEO Win Part 4

In the previous tutorials we already met the most important newLISP data type, the list. A list is technically spoken a sequence of one or more elements, separated by one space and surrounded by balanced parentheses (notice that an empty list exists in newLISP also). Remember: The parentheses around a list identify a unit, which […]

NewLisp for VisualNEO Win Part 3

In newLISP, the data types strings, one-dimensional arrays and lists have a lot in common: they are all sequences of some elements – in a specific order. It is no surprise that many of the newLISP’s built-in functions can be applied to strings, arrays and lists. As the developer of newLISP, Lutz Mueller wrote: “Many […]

newLisp Challenge

Before we continue with Tutorial 3 on newLISP, let’s do now some exercises in newLISP programming. You’ve to solve some little problems. To do so successfully, recall the contents of the first two tutorials on newLISP of mine. In addition, you can use http://www.newlisp.org/downloads/manual_frame.html for info on newLISP functions. [Notice that for some problems one […]

This tutorial is about functions that test for simple conditions. More complicated tests can be made by combining functions and logical operators (not, and, or). NewLISP has so called predicates, that are functions that evaluate to TRUE or NIL after performing a test on its argument. As you know already, NIL is the newLISP equivalent […]

newlisp tutorial 1

newLISP has been compiled into a Windows DLL (dynamic link library): newLISP.dll. Hans Peter Wickern made a free VisualNeo Win plugin that makes it possible to use newLISP within your VisualNeo Win GUI application builder (download hpwNewLISP from https://visualneo.com/product/hpwnewlisp). Why to use newLISP? a. shorter and more efficient code, e.g. by combining functions in one […]

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