An Aggregate pattern can refer to concepts in either statistics or computer programming. Both uses deal with considering a large case as composed of smaller, simpler, pieces.
An aggregate pattern is an important statistical concept in many fields that rely on
statisticsto predict the behavior of large groups, based on the tendencies of subgroups to consistently behave in a certain way. It is particularly useful in sociology, economics, psychology, and criminology.
Design Patterns, an aggregate is not a design pattern but rather refers to an object such as a list, vector, or generator which provides an interface for creating iterators. The following example code is in Python.Python hides essentially all of the details using the [http://www.python.org/doc/lib/typeiter.html iterator protocol] . Confusingly, Design Patternsuses "aggregate" to refer to the blank in the code
for x in ___:which is unrelated to the term "aggregation" [
Design Patterns, p. 22: "Aggregation implies that one object owns or is responsible for another object. ... Aggregation implies that an aggregate object and its owner have identical lifetimes."] . Neither of these terms refer to the statistical aggregation of data such as the act of adding up the Fibonacci sequence or taking the average of a list of numbers.
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