The cancer-color proliferation also has created some quirky chromatic overlaps. Orange represents two cancers (kidney, leukemia). Green stands for three (liver, lymphoma gall bladder). Variations of purple signify six (pancreatic, testicular, leiomyosarcoma, Hodgkin lymphoma, stomach and esophageal).
If the container is empty, then begin() == end(); All standard iterator and container types behave the same in this regard: Â§23.2.1 [container.requirements.general] p6. begin() returns an iterator referring to the first element in the container.
By using this iterator object, we can access each element in the collection, one element at a time. In general, to use an iterator to traverse through the contents of a collection follow these steps: 1. F irst obtain an iterator to the beginning of the collection by calling the collection's iterator(). 2.