What is the difference between “slice” and “splice” in JavaScript arrays? slice() returns a shallow copy of part of an array. splice() modifies the array by adding/removing elements.
What is the purpose of the “apply” and “call” methods in JavaScript? They invoke functions with a specific this context: call() takes arguments individually. apply() takes arguments as an array.
Explain the concept of the event loop in JavaScript and how it handles asynchronous operations. The event loop monitors the call stack and callback/task queues. It pushes callbacks to the stack when it’s clear, ensuring non-blocking async execution.
What is the difference between “slice” and “splice” in JavaScript arrays? slice() returns a shallow copy of part of an array. splice() modifies the array by adding/removing elements.
What is the purpose of the “apply” and “call” methods in JavaScript? They invoke functions with a specific this context: call() takes arguments individually. apply() takes arguments as an array.
Explain the concept of the event loop in JavaScript and how it handles asynchronous operations. The event loop monitors the call stack and callback/task queues. It pushes callbacks to the stack when it’s clear, ensuring non-blocking async execution.
Bitcoin is a decentralized digital currency that you can buy, sell and exchange directly, without an intermediary like a bank. Bitcoin’s creator, Satoshi Nakamoto, originally described the need for “an electronic payment system based on cryptographic proof instead of trust.” Each and every Bitcoin transaction that’s ever been made exists on a public ledger accessible to everyone, making transactions hard to reverse and difficult to fake. That’s by design: Core to their decentralized nature, Bitcoins aren’t backed by the government or any issuing institution, and there’s nothing to guarantee their value besides the proof baked in the heart of the system. “The reason why it’s worth money is simply because we, as people, decided it has value—same as gold,” says Anton Mozgovoy, co-founder & CEO of digital financial service company Holyheld.
How Does Telegram Make Money?
Telegram is a free app and runs on donations. According to a blog on the telegram: We believe in fast and secure messaging that is also 100% free. Pavel Durov, who shares our vision, supplied Telegram with a generous donation, so we have quite enough money for the time being. If Telegram runs out, we will introduce non-essential paid options to support the infrastructure and finance developer salaries. But making profits will never be an end-goal for Telegram.
