max.llact multipurpose storage object values coming into the left inlet are stored on an internal list, values coming into the right inlet are erased. whenever there are numbers stored, 1 is the result. if nothing is stored, output is zero. this is useful to determine wether a row in a matrix has any active points or not, or wether any keys are pressed, since it's not possible to get that information with key and keyup alone.

from the library : max.objects Format : External Environment : max freeware Max 4.x http://www.maximilianmarcoll.de/