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Daniil G., Full-Stack Software Engineer (React + Node.js)

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Last Updated: 4 Jul 2023

- 4+ years of experience in the IT industry as a full-stack engineer - FRONT-END: deep knowledge of JavaScript, ES6+, React, Redux, other React tools (Redux-Thunk, React-query, etc.), Material-UI, HTML5, CSS3, BEM, LESS, SASS, Bootstrap, Webpack, Vite, Jest, Lodash - BACK-END: Node.js, Typescript, Express.js, NestJS, REST API, Postgres, Docker, Google, Facebook auth - Intermediate English - Available ASAP

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Last Updated: 4 Jul 2023

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Vlada Y., Full-stack Software Engineer (Node.js + React)

Burgas, Bulgaria
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- 4+ years of professional experience using front-end and back-end technologies - Front-end: HTML, CSS, BEM, SASS/SCSS, Bootstrap, Webpack, Material-UI, ReactJS, Redux, Redux-Saga, Jest, Lodash, React-Hooks, React-Query - Back-end: NodeJS (Express), Nest.js, REST API, Docker, OAuth, Postgres, TypeOrm, Sequelize - Upper-Intermediate English level - Available in 2 weeks after approval for the project

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Egor G., Full-Stack Software Engineer (Node.js + React)

Kremenchuk, Ukraine
Last Updated: 4 Jul 2023

- 4 years of professional experience with front-end and back-end development - Back-end: NodeJS (Express, Nest), REST API, Docker, Google, Facebook auth, Postgres - Front-end: HTML, CSS, BEM, SASS/SCSS, LESS, Bootstrap, Material-UI, ReactJS, Redux, Redux-Thunk, React-query, Webpack, Vite, Jest, Lodash - Available in 1 week after approval for the project

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Table of Contents

TOP 13 Facts about Lodash

  • Lodash is a popular JavaScript library that provides utility functions for simplifying common programming tasks.
  • It was created by John-David Dalton and released in 2012.
  • Lodash is widely used and has over 46 million weekly downloads on the npm registry as of September 2021.
  • The library is designed to be lightweight and modular, allowing developers to only import the specific functions they need.
  • Lodash offers a wide range of functions, including array manipulation, object manipulation, string manipulation, and more.
  • One of the key features of Lodash is its focus on performance optimization. The library is built with performance in mind and provides efficient algorithms for common tasks.
  • Lodash is compatible with both the browser environment and Node.js, making it versatile for use in various projects.
  • The library has comprehensive documentation and a large community of users, providing support and resources for developers.
  • Lodash follows a functional programming paradigm, promoting immutability and pure functions.
  • It has a modular structure, allowing developers to cherry-pick the functions they need or use the entire library.
  • Lodash has inspired other utility libraries in different programming languages, such as Underscore.js in JavaScript and Ramda in JavaScript and other languages.
  • The library has a strong focus on backward compatibility, ensuring that existing codebases can smoothly upgrade to newer versions.
  • Lodash is actively maintained and regularly updated with bug fixes, performance improvements, and new features.

Soft skills of a Lodash Developer

Soft skills are essential for a Lodash Developer to excel in their role. These skills complement their technical expertise and enable them to work effectively in a team environment, communicate with stakeholders, and deliver high-quality solutions. Here are the soft skills required at different levels of expertise:

Junior

  • Adaptability: Able to quickly learn and adapt to new technologies and frameworks.
  • Problem-solving: Capable of analyzing and resolving coding issues independently.
  • Collaboration: Works well in a team, actively participates in discussions, and shares ideas.
  • Time management: Efficiently manages tasks and meets deadlines.
  • Communication: Effectively communicates with team members and stakeholders to understand requirements and provide updates.

Middle

  • Leadership: Takes ownership of tasks and guides junior developers when needed.
  • Critical Thinking: Analyzes complex problems and proposes innovative solutions.
  • Project Management: Manages multiple projects simultaneously, coordinating with stakeholders and ensuring timely delivery.
  • Mentoring: Provides guidance and support to junior developers, helping them enhance their skills.
  • Adaptability: Adapts to changing project requirements and priorities.
  • Collaboration: Collaborates effectively with cross-functional teams to achieve project goals.
  • Communication: Clearly communicates technical concepts to non-technical stakeholders.

Senior

  • Strategic Thinking: Develops long-term plans and strategies to drive technical excellence.
  • Decision-making: Makes informed decisions based on the analysis of complex technical challenges.
  • Conflict Resolution: Resolves conflicts and handles challenging situations within the team.
  • Innovation: Identifies opportunities for innovation and proposes new approaches to problem-solving.
  • Team Building: Builds and nurtures high-performing teams, fostering a positive work environment.
  • Collaboration: Collaborates seamlessly with stakeholders across the organization.
  • Communication: Effectively communicates complex technical concepts to a diverse audience.
  • Empathy: Understands and empathizes with team members, supporting their growth and development.

Expert/Team Lead

  • Strategic Planning: Develops and executes long-term technical strategies aligned with business goals.
  • Decision-making: Makes critical decisions impacting the team and project outcomes.
  • Conflict Resolution: Resolves conflicts at a higher level, ensuring team productivity and effectiveness.
  • Innovation: Drives innovation and fosters a culture of continuous improvement.
  • Mentoring: Mentors and guides junior and mid-level developers, nurturing their skills and career growth.
  • Collaboration: Collaborates with stakeholders at all levels to drive successful project outcomes.
  • Communication: Communicates complex technical concepts to both technical and non-technical audiences.
  • Empathy: Demonstrates empathy and emotional intelligence in leading and motivating the team.
  • Strategic Hiring: Participates in hiring decisions, building a talented and diverse team.
  • Team Leadership: Leads the team by setting clear goals, providing guidance, and fostering a culture of excellence.
  • Technical Expertise: Demonstrates deep knowledge and expertise in Lodash and related technologies.

Cases when Lodash does not work

  1. Case 1: Large Data Sets
  2. Lodash is a powerful utility library for JavaScript, but it may not be the most efficient solution when working with large data sets. Lodash functions, such as map, filter, and reduce, can consume a significant amount of memory and processing power when applied to large arrays or objects.

    In such cases, it is worth considering alternative approaches, such as using native JavaScript methods or implementing custom solutions tailored to the specific requirements of the data set. These alternatives can often provide better performance and reduce resource usage.

  3. Case 2: Limited Browser Support
  4. When developing for the web, it is essential to consider the browser support for the code and libraries used. While Lodash is widely adopted and supported, there may be cases where you need to ensure compatibility with older or less common browsers that lack full support for Lodash.

    In such scenarios, it is advisable to consult the Lodash documentation and check the browser compatibility matrix to ensure that the functions you intend to use are supported across the targeted platforms. If compatibility issues arise, you may need to either find alternative solutions or consider polyfills to bridge the gaps in browser support.

  5. Case 3: Project Size and Overhead
  6. When integrating Lodash into a project, it is important to consider the overall size and overhead it introduces. While Lodash provides a rich set of utility functions, including many that are not commonly used, including the entire library can significantly increase the bundle size and load times.

    In cases where a project requires only a subset of Lodash’s functionality, it may be more efficient to cherry-pick specific functions or use smaller, more specialized utility libraries that offer only the required features. This approach can help reduce the overall project size and improve loading times.

  7. Case 4: Performance-Critical Applications
  8. While Lodash offers convenient and expressive ways to manipulate data, it may not be the best choice for highly performance-critical applications. In scenarios where every millisecond counts, it is worth considering lower-level, optimized approaches that directly manipulate data structures or utilize more specialized libraries.

    For example, when dealing with intensive mathematical computations or real-time data processing, using libraries tailored to those specific domains can often provide superior performance compared to the generalized utility functions provided by Lodash.

  9. Case 5: Learning Curve and Familiarity
  10. Introducing a dependency like Lodash into a project adds an extra layer of complexity. While Lodash’s API is well-documented and intuitive, it still requires developers to learn and familiarize themselves with its syntax, function names, and usage patterns.

    In cases where the project team is already proficient in native JavaScript and the functions provided by Lodash do not offer significant advantages, it may be more efficient to stick with native JavaScript methods. This approach avoids the learning curve associated with a new library and minimizes the cognitive overhead for the development team.

It is important to note that the above cases do not imply that Lodash is inherently flawed or should be avoided in all scenarios. Lodash remains a versatile and widely used utility library with many benefits. However, being aware of its limitations and considering alternative approaches when necessary can lead to more efficient and optimized code.

What are top Lodash instruments and tools?

  • _.map: A versatile tool that allows you to iterate over a collection and transform its values. It has been a part of Lodash since its initial release in 2012. _.map is widely used for data manipulation and processing in JavaScript applications.
  • _.filter: Another powerful tool for working with collections, _.filter lets you create a new array by selecting elements that meet certain conditions. It was introduced in Lodash in 2012 and has since become a popular choice for filtering data in JavaScript projects.
  • _.reduce: This tool enables you to reduce a collection to a single value by applying an accumulator function. With _.reduce, you can perform calculations or derive insights from a set of data. It has been a core feature of Lodash since its inception in 2012.
  • _.debounce: An outstanding tool for optimizing performance, _.debounce allows you to delay the execution of a function until a certain amount of time has passed without any subsequent calls. It helps prevent unnecessary function invocations, particularly in scenarios where user input triggers frequent updates. _.debounce has been available in Lodash since 2012 and has been widely used to enhance the responsiveness of web applications.
  • _.groupBy: With _.groupBy, you can group elements in a collection based on a specified criterion. This tool was added to Lodash in 2012 and has proven valuable for organizing and categorizing data in JavaScript applications.
  • _.shuffle: A fun and handy tool, _.shuffle allows you to randomize the order of elements in an array. It was introduced in Lodash in 2012 and has since been used in various scenarios, such as creating randomized quizzes or shuffling playlists in music applications.
  • _.cloneDeep: A reliable tool for creating deep copies of objects and arrays, _.cloneDeep ensures that any changes made to the original copy do not affect the cloned copy. It has been a part of Lodash since its early days and is frequently used in JavaScript projects that require working with complex data structures.
  • _.get: This tool provides a convenient way to access nested properties of an object without worrying about potential errors. _.get was added to Lodash in 2012 and has become a go-to method for safely retrieving data from deeply nested structures in JavaScript applications.
  • _.throttle: Similar to _.debounce, _.throttle helps optimize performance by limiting the rate at which a function can be called. However, instead of delaying the execution, _.throttle ensures that the function is invoked at a steady interval. This tool was introduced in Lodash in 2012 and has been widely used to regulate event handling and prevent excessive function calls.

How and where is Lodash used?

Case NameCase Description
Data ManipulationLodash provides a wide range of functions for data manipulation, such as filtering, sorting, mapping, and reducing arrays and objects. These functions allow developers to quickly and efficiently perform common data manipulation tasks, improving productivity and reducing development time.
String ManipulationWith Lodash, developers can easily manipulate strings by using functions like `camelCase`, `kebabCase`, `truncate`, and `startsWith`. These functions simplify string manipulation tasks and help ensure consistent and efficient code implementation.
Collection IterationLodash offers powerful functions for iterating over collections, including arrays, objects, and strings. Functions like `forEach`, `map`, `filter`, and `reduce` enable developers to process and transform data in a concise and readable manner, resulting in cleaner and more maintainable code.
Error HandlingLodash provides functions that aid in error handling and data validation. For example, the `defaultTo` function allows developers to set default values for variables, reducing the likelihood of unexpected errors. Additionally, functions like `isNil`, `isEmpty`, and `isEqual` help validate data and prevent potential issues.
Functional ProgrammingLodash supports functional programming paradigms by providing functions that enable developers to compose and chain operations. Functions like `compose`, `curry`, and `flow` allow for more modular and reusable code, promoting code maintainability and readability.
Performance OptimizationLodash is designed with performance in mind. It provides optimized implementations for common operations, such as deep cloning objects, comparing values, and manipulating arrays. By leveraging these optimized functions, developers can improve the performance of their applications and deliver a better user experience.

TOP 10 Lodash Related Technologies

  • JavaScript

    JavaScript is the most fundamental language for Lodash software development. It is a versatile and widely supported language that allows developers to create interactive web applications and server-side programs. With its extensive ecosystem and large community, JavaScript is an essential tech skill for Lodash development.

  • Node.js

    Node.js is a powerful runtime environment for executing JavaScript code on the server side. It provides a non-blocking, event-driven architecture that enables efficient handling of concurrent requests. Lodash developers often use Node.js to build scalable and high-performance backend systems.

  • React

    React is a popular JavaScript library for building user interfaces. It allows developers to create reusable UI components and efficiently update the DOM. Lodash developers leverage React to build interactive and responsive web applications with a modular and maintainable codebase.

  • Vue.js

    Vue.js is another JavaScript framework for building user interfaces. It offers a simple and intuitive syntax, making it easy for developers to create dynamic and reactive web applications. Lodash developers often choose Vue.js for its lightweight nature and seamless integration with existing projects.

  • Express.js

    Express.js is a minimal and flexible web application framework for Node.js. It simplifies the process of building web APIs and handling HTTP requests. Lodash developers often utilize Express.js to create robust server-side applications and RESTful APIs.

  • Webpack

    Webpack is a popular module bundler for JavaScript applications. It allows developers to bundle and optimize their code, manage dependencies, and enable features like code splitting and hot module replacement. Lodash developers often use Webpack to efficiently package and deploy their applications.

  • Git

    Git is a distributed version control system that allows developers to track changes in their codebase, collaborate with others, and easily manage different branches of code. Lodash developers rely on Git to ensure version control and streamline their development workflow.

Pros & cons of Lodash

6 Pros of Lodash

  • Improved code efficiency: Lodash provides a set of utility functions that can help simplify and optimize your code. By using these functions, you can achieve more with less code, resulting in improved performance and reduced development time.
  • Consistent cross-browser compatibility: Lodash takes care of browser inconsistencies, making it easier to write code that works seamlessly across different browsers. This can save you significant time and effort in testing and debugging.
  • Modular and customizable: Lodash is designed as a collection of individual modules, allowing you to include only the specific functions you need in your project. This modular approach promotes code reusability and keeps your bundle size small.
  • Functional programming support: Lodash provides a rich set of functional programming functions, such as map, filter, reduce, and compose. These functions enable you to write more expressive and declarative code, making your codebase easier to understand and maintain.
  • Well-documented and actively maintained: Lodash has comprehensive documentation, including examples and usage guidelines, making it easy to learn and use. It also has a large and active community, ensuring continuous development and support.
  • Wide range of utility functions: Lodash offers a vast collection of utility functions for various use cases, from manipulating arrays and objects to handling strings, dates, and more. This extensive library of functions can significantly simplify your development tasks.

6 Cons of Lodash

  • Additional dependency: Using Lodash in your project introduces an additional dependency that needs to be managed. While Lodash is a well-established and widely used library, it does add an extra layer of complexity to your project’s dependencies.
  • Learning curve: Although Lodash has comprehensive documentation, learning and understanding all the available functions and their usage can take time, especially if you are new to the library. This learning curve may slow down initial development efforts.
  • Potential performance impact: While Lodash provides performance optimizations, some functions may still introduce overhead compared to writing custom code tailored to your specific use case. It is important to evaluate the performance implications of using Lodash in your project.
  • Increased bundle size: Including Lodash in your project can increase the size of your JavaScript bundle. If you only need a few functions from Lodash, it may be more efficient to implement those functions manually to minimize the bundle size.
  • Function overlap with native JavaScript: Some of the utility functions provided by Lodash have equivalents in native JavaScript, such as Array.map() or Object.keys(). Depending on your project requirements and browser support, you may prefer to use native JavaScript functions instead of adding an additional library.
  • Less control over implementation: By relying on Lodash for utility functions, you give up some control over the implementation details. If you have specific requirements or need custom behavior, you may need to write your own functions instead of relying on Lodash.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior0-2 yearsAssisting senior developers in coding and debugging tasks, learning new technologies and frameworks, participating in code reviews and testing, collaborating with team members on project tasks$50,000 – $70,000
Middle2-5 yearsDeveloping features and modules, writing clean and efficient code, participating in architectural discussions, mentoring junior developers, conducting code reviews, collaborating with cross-functional teams$70,000 – $90,000
Senior5-8 yearsLeading development projects, designing and implementing complex systems, optimizing code performance, providing technical guidance and mentoring to junior and middle developers, collaborating with stakeholders, ensuring project delivery$90,000 – $120,000
Expert/Team Lead8+ yearsLeading and managing development teams, defining technical strategies and roadmaps, overseeing project execution, resolving technical challenges, coordinating with other teams and departments, providing leadership and mentorship, driving innovation$120,000 – $150,000+

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