I would appreciate if someone could explain why the output of this code:
*a, b = [1, 2, 3, 4]
a[b-2] + b
is 7. Could anyone please break it down line by line so I understand what's going on here? How does this become 7?
Array equation explanation
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5 Answers
By using the splat operator on a we are basically letting a to scoop up all the other numbers that b does not need. So b takes one number from the array and a takes everything that is left.
b = 4
a = [1,2,3]
Now when we do this:
a[b-2] + b
It translates into:
a[4-2] + 4
a[2] + 4
Now we check what number is in position 2 in array a.
3 + 4 = 7
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