Re: function to check if array is empty

*To*: mathgroup at smc.vnet.net*Subject*: [mg88345] Re: [mg88313] function to check if array is empty*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Fri, 2 May 2008 03:44:20 -0400 (EDT)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <200805010722.DAA26200@smc.vnet.net>*Reply-to*: murray at math.umass.edu

Your array is hardly "empty": it's full of zeros! If what you want to do is test to see whether every entry is 0, the following will do it: And @@ Thread[0 == Flatten @ X] ] will parr wrote: > Dear Math Forum, > > this probably already exists, but I can't find it anywhere: > > is there a function that will check if an array is empty? > > i'm looking for a function to return either True (or 1), or False (or 0) when it checks an array. eg: > > X = Array[0 &, {3, 3}] > > then test with function (called ArrayEmpty, for example) > > In: ArrayEmpty[X] > > Out: True > > best wishes, > > Will > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**function to check if array is empty***From:*will parr <willpowers69@hotmail.com>