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@sushev

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What Is Claudia.js? Claudia.js is a Node.js library that simplifies the deployment of JavaScript (and TypeScript) applications to AWS Lambda and API Gateway. Instead of manually configuring Lambda functions, API Gateway endpoints, and dealing with multiple AWS services, Claudia.js automates much of the process with a few simple commands. Key Benefits: Easy Setup: Automatically creates and configures AWS Lambda functions and API Gateway endpoints. Simple Commands: Deploy and update your code with minimal AWS console interaction. Support for Multiple Frameworks: Integrates well with popular Node.js frameworks like Express. Automatic Role & Policy Creation: Claudia handles IAM roles and policies for you. Built-In API Builder: Claudia’s own claudia-api-builder library helps you quickly set up HTTP endpoints. Why Use Claudia.js for Cloud Functions? Reduced Configuration Overhead: Claudia.js drastically cuts down the manual steps usually required to set up AWS resources. .

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What is useMemo? useMemo is a built-in hook that memoizes a computed value. It takes a function and a list of dependencies, then recomputes the value only when one of the dependencies changes. If the dependencies haven’t changed between renders, React returns the memoized (cached) value. Syntax javascript Копировать Редактировать const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]); Callback function: The first parameter is a function that returns the computed value. Dependency array: The second parameter is an array of dependencies. The computation is rerun only if one or more of these dependencies have changed since the last render. https://react.dev/reference/react/useMemo

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@sushev Base Folder Structure Here’s a common structure for a JavaScript project: ├── src/ # Source files │ ├── components/ # Reusable UI components │ ├── services/ # API calls and service logic │ ├── utils/ # Utility functions │ ├── assets/ # Static files (images, fonts, etc.) │ ├── views/ # Page-level components (for single-page apps) │ ├── index.js # Main entry point │ ├── App.js # Root component │ ├── public/ # Static public assets │ ├── index.html # Main HTML file │ ├── favicon.ico # Site favicon │ ├── .env # Environment variables ├── .gitignore # Files to ignore in Git ├── package.json # Project metadata and dependencies ├── webpack.config.js # Webpack configuration (if applicable) └── tsconfig.json # TypeScript configuration (if using TS)

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Define Objectives Trading Goals: Decide what the bot should achieve (e.g., scalping, trend following, arbitrage). Market and Assets: Choose the market (e.g., stocks, cryptocurrency, forex) and the assets your bot will trade. Risk Management: Set rules for position sizing, stop-loss limits, and risk tolerance. 2. Understand the Basics Market Knowledge: Learn about market structures, trading strategies, and indicators. Programming Skills: Proficiency in a programming language like Python, JavaScript, or C++ is essential. APIs: Familiarize yourself with APIs of trading platforms (e.g., Binance, Coinbase, Interactive Brokers). Regulations: Ensure compliance with trading regulations in your jurisdiction.

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1. Junior Developer (Entry-Level) Experience: 0–2 years Key Characteristics: Learning the basics of coding, tools, and processes. Requires guidance and supervision from senior team members. Works on well-defined tasks, such as fixing bugs or implementing small features. Focuses on learning company-specific tech stacks, best practices, and workflows. Skills: Basic knowledge of programming languages and frameworks. Familiarity with version control systems (e.g., Git). Eager to learn and improve. 2. Mid-Level Developer (Intermediate) Experience: 2–5 years Key Characteristics: Capable of handling tasks independently with minimal supervision. Works on more complex features, integrations, and improvements. Begins to mentor junior developers. Balances speed and quality in code delivery. Skills: Proficient in one or more programming languages or frameworks. Good understanding of software development life cycles. Knowledge of debugging, testing, and optimization.

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Certainly! Let's explore Mocha, a popular JavaScript test framework. Mocha What it is: Mocha is a feature-rich JavaScript test framework that runs on Node.js and in the browser. It provides a flexible and expressive syntax for writing tests. Key Features: Supports various testing styles: Mocha supports different testing styles, including: BDD (Behavior-Driven Development): Using describe and it blocks to define tests in a human-readable format. Reporting: Provides various reporting options, including console output, JUnit XML, and HTML reports. Parallel Testing: Can run tests in parallel for faster execution. Example: JavaScript const assert = require('assert'); describe('Math Operations', function() { it('should add two numbers correctly', function() { assert.equal(2 + 2, 4); }); it('should subtract two numbers correctly', function() { assert.equal(5 - 3, 2); }); });

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Certainly, let's delve into the world of functional programming! Functional Programming is a programming paradigm where programs are constructed by combining pure functions. Key Concepts: Pure Functions: Input-Output Determinism: Given the same input, a pure function always produces the same output. No Side Effects: Pure functions do not modify any external state (like global variables) or have any observable interaction with the outside world (e.g., network requests, file system operations). This makes them easier to reason about and test. Immutability: Data is generally treated as immutable. When data needs to be modified, a new copy is created instead of altering the original. This helps prevent unintended side effects and makes it easier to track changes. Higher-Order Functions: Functions that can take other functions as arguments or return functions as results. Examples include map, filter, reduce, compose. https://functiondev.medium.com/

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Certainly! Let's talk about SCSS (Sassy CSS). What is SCSS? Superset of CSS: SCSS (Sassy CSS) is a preprocessor for CSS. It extends the basic syntax of CSS with features like variables, nesting, mixins, and more, making it easier to write, maintain, and scale your stylesheets. Compiled to CSS: SCSS files are compiled into regular CSS that can be used in any web browser. Key Features of SCSS: Variables: Define variables to store and reuse color values, font sizes, and other CSS properties. SCSS $main-color: #333; $font-size-base: 16px; body { color: $main-color; font-size: $font-size-base; } Nesting: Nest CSS rules within other rules, improving readability and maintainability. SCSS .container { .row { display: flex; } }

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Certainly! Let's talk about SCSS (Sassy CSS). What is SCSS? Superset of CSS: SCSS (Sassy CSS) is a preprocessor for CSS. It extends the basic syntax of CSS with features like variables, nesting, mixins, and more, making it easier to write, maintain, and scale your stylesheets. Compiled to CSS: SCSS files are compiled into regular CSS that can be used in any web browser. Key Features of SCSS: Variables: Define variables to store and reuse color values, font sizes, and other CSS properties. SCSS $main-color: #333; $font-size-base: 16px; body { color: $main-color; font-size: $font-size-base; } Nesting: Nest CSS rules within other rules, improving readability and maintainability. SCSS .container { .row { display: flex; } }

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Certainly! Let's talk about the ternary operator in JavaScript. Ternary Operator (Conditional Operator) The ternary operator is a concise way to write conditional expressions in JavaScript. It provides a shorthand for the if...else statement. Syntax: JavaScript condition ? expressionIfTrue : expressionIfFalse; Breakdown: condition: An expression that evaluates to true or false. expressionIfTrue: The value to be returned if the condition is true.

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Understanding useContext in React useContext is a React Hook that provides a way to access context values from a context object. It's particularly useful for sharing data that needs to be accessible throughout a component tree without prop drilling. How it Works Create a Context: Use React.createContext to create a context object. This object will hold the data you want to share. Provide the Context: Wrap the parts of your component tree that need access to the context with the Context.Provider component. Pass the desired value as a prop to the Provider. Consume the Context: Use the useContext Hook within components that need to access the context value.

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Vue.js: A Progressive JavaScript Framework Vue.js is a popular and versatile JavaScript framework for building user interfaces. It's designed to be approachable, yet capable of powering complex single-page applications. Core Concepts of Vue.js: Components: Vue.js applications are built from reusable components, each with its own HTML template, JavaScript logic, and CSS styles. Declarative Rendering: You describe the desired state of the UI, and Vue.js efficiently updates the DOM when the underlying data changes. Data Binding: Vue.js uses a two-way data binding system, meaning changes in the data are reflected in the UI, and vice versa. Virtual DOM: Vue.js uses a virtual DOM to minimize direct DOM manipulations, resulting in high performance. https://vuejs.org/

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bcrypt: A Strong Password Hashing Function bcrypt is a powerful password hashing function designed to protect sensitive information like passwords. It's widely used in web applications to secure user credentials and prevent unauthorized access. How bcrypt Works: Salt Generation: A unique salt is generated for each password. This salt is added to the password before hashing, making it more difficult for attackers to crack. Hashing: The salted password is repeatedly hashed using a cryptographic hash function, such as SHA-256. The number of iterations, known as the "work factor," can be adjusted to control the hashing time. Storage: Only the hashed password and salt are stored in the database. Why Use bcrypt? Security: Bcrypt is highly resistant to brute-force attacks and rainbow table attacks. Flexibility: The work factor can be adjusted to increase security over time. Simplicity: Easy to implement in various programming languages. https://www.npmjs.com/package/bcrypt

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REST API: A Building Block of Modern Web Applications A RESTful API (Representational State Transfer) is a software architectural style that defines a set of constraints for creating web services. It's a popular approach for building web APIs that interact with various clients, such as web applications, mobile apps, and other services. Key Principles of REST: Client-Server Architecture: Clear separation between the client and server. The client requests resources from the server, and the server responds with the requested data. Statelessness: Each request from the client must contain all the information necessary to understand and process the request. The server does not store any session state between requests. Cacheability: Responses can be cached to improve performance and reduce server load. Clients can cache responses and reuse them for subsequent requests. Uniform Interface:

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A JSON Web Token (JWT) is an open standard used to securely transmit information between two parties as a JSON object. It's commonly used for authentication and authorization in web applications. Structure of a JWT A JWT is composed of three parts, separated by dots (.): Header: Contains information about the token type and the signing algorithm used. Payload: Contains the claims or information being transmitted, such as user ID, roles, and expiration time. Signature: A cryptographic signature that ensures the integrity and authenticity of the token. How JWT Works Issuance: The server generates a JWT, signs it with a secret key, and sends it to the client. Transmission: The client stores the JWT, usually in a cookie or local storage, and sends it with each subsequent request to the server. Verification: The server verifies the signature of the received JWT to ensure its authenticity.

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JavaScript's event loop is a fundamental mechanism that allows the language to execute code asynchronously. It's responsible for managing the execution of tasks, handling events, and ensuring a smooth user experience. Understanding the Event Loop To grasp the concept, let's break down the components involved: Call Stack: A stack data structure where function calls are pushed and popped as they execute. Message Queue: A queue of messages (tasks) waiting to be processed. Event Loop: Continuously checks the call stack and message queue. How the Event Loop Works Initial Execution: When a JavaScript script starts, the main thread begins executing the code synchronously, pushing functions onto the call stack as they're called. Asynchronous Operations: If an asynchronous operation (like a network request or a timer) is encountered, it's offloaded to the browser's background thread. Callback Queue: Once the asynchronous operation completes, a callback function is added to the message queue. Event Loop's Role: ad.

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Dependency Injection: A Clean Approach to Building Modular Applications Dependency Injection (DI) is a powerful design pattern that promotes loose coupling and modularity in software applications. By decoupling components, DI makes your code more maintainable, testable, and flexible. What is Dependency Injection? In simple terms, DI is a technique where objects receive their dependencies from external sources rather than creating them internally. This allows for greater flexibility and testability, as components can be easily swapped or mocked during testing. Types of Dependency Injection: Constructor Injection: Dependencies are passed to a class's constructor. This is the most common and preferred approach, as it ensures that all required dependencies are provided upfront. Setter Injection: Dependencies are injected through setter methods. This can be useful when optional dependencies are needed. Method Injection:

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https://phdiva.blog/2024/02/20/book-review-the-guest-b-a-paris/ Me trying to explain blockchain technology to my non-crypto friends.

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Bootstrap: The Popular Front-End Framework for Web Development Bootstrap is one of the most widely used open-source front-end frameworks for designing responsive and mobile-first websites. Developed by Twitter engineers in 2011, it has become a favorite among developers due to its ease of use, powerful features, and consistent design patterns. 🔹 What is Bootstrap? Bootstrap is a CSS framework that provides pre-designed templates and components for building web pages quickly and efficiently. It uses HTML, CSS, and JavaScript and is particularly effective in creating responsive designs that adapt to different screen sizes. The latest version, Bootstrap 5, offers improved features like better grid customization, reduced reliance on JavaScript, and removal of jQuery dependency. https://getbootstrap.com/

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🔹 Getting Started To start using MUI in your project: Install it via npm: bash npm install @mui/material @emotion/react @emotion/styled Import and use components in your React application: javascript Копировать код import * as React from 'react'; import Button from '@mui/material/Button'; function App() { return <Button variant="contained">Click Me</Button>; } export default App; MUI is a powerful choice for React developers who need a versatile, production-ready UI framework. It blends aesthetic appeal, functionality, and ease of use, empowering teams to build exceptional applications efficiently. For more details, visit the official Material-UI website. https://mui.com/material-ui/getting-started/installation/

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