Hello everybody, I am not yet looking for a sponsor, but going to program a tiny tool. Because I am unexperienced and don’t want to do all the work for nothing, first of all:
Is this tool senseful, is there a certain need for it? I am very interested in your opinions, hoping that this list is the right place for that. And here it is: setop takes as inputs several lists/sets, calculates desired (mathematical) set operations on them and outputs the final set (or depending on operation resulting number of elements, answer yes/no, …). For example: File A contains 3 3 2 5 1 (each number an extra line). Then setop A would result in 1 2 3 5. This is equivalent to sort | uniq With a file B containing 5 90 2 7 the command setop -i A B would yield 2 5. Here, -i stands for intersection. Of course, there is no limitation to numbers, elements can be any non-empty strings. Other operations are union, symmetric difference, difference, contains element, is subset, cardinality and so on. As you can see on <http://www.catonmat.net/blog/set-operations-in-unix-shell-simplified/> nearly all these operations can already be done with other tools, but the according command lines are mostly very tortuous. There doesn’t seem to be a tool that directly works with sets. I even exactly know what options setop (name ok?) should have and what it can do (how it is used), but am waiting for some responses from you before programming. I would be very grateful for your feedback, Frank -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/1383147779.1944.30.camel@storch-desktop
