Абстракция – это принцип ООП, который заключается в том, что при проектировании классов и создании объектов мы должны определять только ключевые свойства сущности и отбрасывать второстепенные.
Абстрактный класс — это, по сути, “заготовка” для группы будущих классов. Саму заготовку нельзя использовать напрямую — она слишком “сырая”. Однако она описывает базовое состояние и общее поведение, которые будут унаследованы дочерними классами.
BY JavaRocks
The SSE was the first modern stock exchange to open in China, with trading commencing in 1990. It has now grown to become the largest stock exchange in Asia and the third-largest in the world by market capitalization, which stood at RMB 50.6 trillion (US$7.8 trillion) as of September 2021. Stocks (both A-shares and B-shares), bonds, funds, and derivatives are traded on the exchange. The SEE has two trading boards, the Main Board and the Science and Technology Innovation Board, the latter more commonly known as the STAR Market. The Main Board mainly hosts large, well-established Chinese companies and lists both A-shares and B-shares.
A Telegram spokesman declined to comment on the bond issue or the amount of the debt the company has due. The spokesman said Telegram’s equipment and bandwidth costs are growing because it has consistently posted more than 40% year-to-year growth in users.
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