Don't stomp variables
Don’t do:
text = text.split(delimiter)
Instead do:
const a = text.split(delimiter)
That way at the end of the program you can add
console.log({a, text})
and see both the array and the original text
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This makes sense in the case where the variable doesn't take up a lot of memory - stomping can make sense if you have a giant object (e.g. big pandas array) that you transform several times in the method