You can initialize a new array with a set of values using this syntax, which first initializes an array of 12 elements, and fills each element with the number 0:
const b = Array(12).fill(0)
const b = Array()
is another way to define an array, which is equivalent to using the array literal syntax const b = []
const b = Array()
//same as
const b = []
b
is now an array of 12 items that all have the value 0
.
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