I have been working my way through the "Learning J" online book https://www.jsoftware.com/help/learning/contents.htm with a recency of 2015.
In the 6th chapter (https://www.jsoftware.com/help/learning/06.htm) there is a sub-section dedicated to using bare verbs (not gerunds) as the bound left conjunct to Amend (with explanations of linear-indices). Later, in the 14th chapter (14.3.5 Gerund as Argument to Amend) gerunds are introduced as viable tied-nouns to be the bound left conjunct to Amend. Additionally, the NuVoc for Amend has (all the way at the bottom) a warning as follows: "An obsolete form of Amend: (x u} y) was used in early versions of J. where operand u is a verb. Its use is deprecated in favor of x m} y." Is it true to say that this warning refers to the same verbs as discussed in Chapter 6? thanks Daniel Eklund PS. It took me a bunch of searching through nabble to find the gerund usage of Amend as a means (preferable, in my opinion) to dynamically generate indices and replacement values in a nice calculable way ( http://jsoftware.2058.n7.nabble.com/Tacit-definition-using-Amend-td4950.html#a4951). which led me to search ahead to Chapter 14 to discover the gerund form. I say this in the context of me being a complete newbie and struggling to use Amend with calculated indices in various programming exercises. I hope not to sound critical. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
