checklist.md

1. [CODE KNOWLEDGE] - Don't use iteration methods to modify an already existing array/object. (forEach is exception). These methods return a new array, so you should use it.
2. [CODE STYLE] - Avoid variable namings like array , object arr, obj, result. It will decrease code readability
3. [CODE KNOWLEDGE] - Don't need to make copy before each operation. Moreover, methods like filter or map don't mutate original array.
4. [CODE STYLE] - All chained methods called on the same level should have same indentation. This makes code much more readable.

BAD EXAMPLE:

const cssStyles = styles.map(style => style).filter(style => style.length).slice(0, 5)

GOOD EXAMPLE:

const cssStyles = styles
 .map(style => style)
 .filter(style => style.length)
 .slice(0, 5)

5. [CODE PRACTICE] - Avoid using loops in this task, use iteration methods instead.