Food pantries in Pima County Arizona and Tucson provide free or low cost groceries, food, and meals to families and individuals who need help.
One of the important aspects of REST (or at least HTTP) is the concept that some operations (verbs) are idempotent. As Gregor Roth said several years ago: The PUT method is idempotent. An idempotent method means that the result of a successful performed request is independent of the number of times it is executed. Idempotency is also something discussed in the SOA Design Patterns.
In symbols, H is a retract of G if and only if there is an endomorphism such that Ï = h for all and for all . The endomorphism itself is termed an idempotent endomorphism or a retraction. The following is known about retracts: âA subgroup is a retract if and only if it has a normal complement.