ScriptdrillRunning totals
A JavaScript exercise from Scriptdrill. Solve it with a code editor in your browser that runs your function against example and hidden tests, and it is checked the moment you submit.
The task
Return a new array where each position holds the sum of all numbers up to and including that position. Do not change `nums`.
What this exercise teaches
One variable carries the sum from one position to the next, so each step costs one addition. map builds the new array and leaves nums as it was.
A hint if you get stuck
Keep a running total in a variable and `map` each number to the total after adding it.
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