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We are going to see how object lookups can sometimes be used as a more maintainable alternative to if and switch statements.
This is a pattern to split the values from an array into two groups based on a condition, if is truthy the corresponding element belongs to the first group, otherwise it belongs to the second group.
We are going to divide or chunk the array into many smaller arrays or subarrays where each one is of a specified length size.
We constantly coming up against adding conditional properties to an Object, we are going to use the spread operator and the short-circuit evaluation to deal with it an elegant way.
Handling array duplicates can be tricky. There are multiple ways to remove duplicates from an array, we are going to take a look of Set constructor and a couple of implementatios of indexOf(), filter(), and forEach() methods.
A professional developer will write the code thinking about your later self, for your 'co-workers' or just 'the other guy' and not just for the machine. If you worry about how the code it is written and not only if it work or not then you care about the clean code