<HEAD> <TITLE> unique_array - partitions an array of objects into groups </TITLE> </HEAD> <BODY BACKGROUND=http://www.imaginary.com/~beek/gifs/bg.jpg TEXT=#000000 ALINK=#FFFF00 VLINK=#550000 LINK=#000099> <center> <H1> unique_array - partitions an array of objects into groups </H1> </center> <p> <b> array unique_array(object array obarr, string separator); </b> <p> <b> array unique_array(object array obarr, string separator, mixed skip); </b> <p> <b> array unique_array(array arr, function f); </b> <p> <b> array unique_array(array arr, function f, mixed skip); </b> <p> Groups objects/values together for which the `separator' function returns the same value. In the first case, "separator" is a string function name to try on each object. In the second case, the function f is called with the element as the argument. If 'skip' is passed, elements for which the separator function returns the same as 'skip' are omitted from the return value. <p> The return value is an array of arrays of the form: <pre> ({ ({Same1:1, Same1:2, Same1:3, .... Same1:N }), ({Same2:1, Same2:2, Same2:3, .... Same2:N }), ({Same3:1, Same3:2, Same3:3, .... Same3:N }), .... .... ({SameM:1, SameM:2, SameM:3, .... SameM:N }), }) </pre> <p> i.e. an array of arrays, where each of the elements in the sub arrays returned the same value as the other elements in the same sub array. <p> <HR> <ADDRESS> <A HREF=http://wagner.princeton.edu/~tim> Tim Hollebeek </A> <p> <A HREF="http://www.imaginary.com/~beek/"> Beek </A>@ZorkMUD, Lima Bean, IdeaExchange, TMI-2, and elsewhere </ADDRESS>