English Quiz - equality operator, forEach/map/reduce, CSS preprocessor

1. What is the difference between ‘==’ and ‘===’?

• the equality operator and the strict equality operator check whether their two operands are equal and return a boolean result.
• While the equality operator attempts to convert and compare operands of different types, the strict equality operator always considers operands of different types to be different.

2. Explain how you can use JavaScript functions such as forEach, Map, or Reduce.

• The forEach function is used to loop through an array and perform an operation on each element. This is useful when you want to perform a simple opertation on each element of an array.
• The map function is used to create a new array with the result of an operation performed on each element. This is useful when you want to transform an array into a new form.
• The reduce function is used to reduce an array to a single value by performing an operation on each element. This is useful when you want to perform a complex operation on an array and return a single value.

3. Do you use CSS preprocessors? What are their pros and cons?

• I used SCSS in a few project.
• Firstly, I explain the pros of CSS preprocessors.
  • By using variables, mixins, functions, and nesting, CSS preprocessors can significantly reduce the amount of code that needs to be written and maintained, thus improving productivity.
  • Preprocessors allow developers to create modular and reusable code, which makes the codebase easier to read, update, and maintain over time.
• Nextly, I explain the cons of CSS preprocessors.
  • Preprocessors have a learning curve and can introduce additional complexity to the development process, especially when working with advanced features like functions and mixins.
  • Since CSS preprocessor need to be complied into standard CSS before deploy, this adds an additional build step to the development process.
  • Using a CSS preprocessor adds a dependency to project, which can make it harder to manage and deploy, particularly in large-scale projects.

참고

• MDN - Equality (==)
• MDN - Strict equality (===)