So, the empty Starliner space capsule will undock from the International Space Station’s Harmony module no earlier than 6:04 p.m. ET, Friday, Sept. 6, NASA explained.

President Trump on Friday said he is cutting off all trade talks with Canada, threatening to set a new tariff rate on goods imported from the country within the next week.

empty() full() Cost: a bad implementation using a linked list where you enqueue at the head and dequeue at the tail would be O(n) because you'd need the next to last element, causing a full traversal ...

In week 3, the Spark test test_monthly_site_hits fails due to an empty array. This fix uses the get() to tolerate accessing element at invalid index and return NULL instead Before spark = <pyspark ...