00:00 - что такое Symbol в JavaScript/TypeScript 00:30 - что будем делать 01:04 - синтаксис Symbol 02:10 - вывод Symbol в консоль 02:56 - Symbol как скрытое свойство 06:29 - зачем скрывать свойства 08:06 - Symbol в литеральном объекте 08:38 - Symbol в цикле "for ... in" 09:44 - копирование объектов с символьными свойствами 10:50 - глобальный реестр символов в JavaScript/TypeScript "Symbol.for()" 13:53 - получение имени символа из глобального реестра символов "Symbol.keyFor()" 15:37 - сравнение обычных Symbol и символов из глобального реестра символов 17:26 - системные символы 18:12 - итоги
00:00 - что такое Symbol в JavaScript/TypeScript 00:30 - что будем делать 01:04 - синтаксис Symbol 02:10 - вывод Symbol в консоль 02:56 - Symbol как скрытое свойство 06:29 - зачем скрывать свойства 08:06 - Symbol в литеральном объекте 08:38 - Symbol в цикле "for ... in" 09:44 - копирование объектов с символьными свойствами 10:50 - глобальный реестр символов в JavaScript/TypeScript "Symbol.for()" 13:53 - получение имени символа из глобального реестра символов "Symbol.keyFor()" 15:37 - сравнение обычных Symbol и символов из глобального реестра символов 17:26 - системные символы 18:12 - итоги
Telegram today rolling out an update which brings with it several new features.The update also adds interactive emoji. When you send one of the select animated emoji in chat, you can now tap on it to initiate a full screen animation. The update also adds interactive emoji. When you send one of the select animated emoji in chat, you can now tap on it to initiate a full screen animation. This is then visible to you or anyone else who's also present in chat at the moment. The animations are also accompanied by vibrations. This is then visible to you or anyone else who's also present in chat at the moment. The animations are also accompanied by vibrations.
How Does Bitcoin Work?
Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. “Once a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”
