A hashtable or a hash map is a data structure that is used to implement an associative array. It is user-defined reference types. It associates keys with values. The primary operation in hash table is look like: given a key (e.g. a studentâs name), find the corresponding value (e.g. that studentâs ID number).
DRTV is a type of television-based advertising that encourages viewers/consumers to call, visit a website or in some other way make a purchase, register, vote, make an appointment, request more information or take another desired action.
A DVR (digital video recorder) is a Set-Top Box that records and stores television shows for viewing at a later time. A DVR can be used on only one outlet or you can have one for every outlet in your home. DVRs: 1  Work with your current equipment, including VCRs, DVD players and surround sound systems.