js array devrease by 1 code example
Example 1: syntax of reduce in js
[1,2,3,4,5].reduce((acc, current)=>acc+current, 0)Example 2: .reduce mdn
arr.reduce(callback( accumulator, currentValue[, index[, array]] )[, initialValue])[1,2,3,4,5].reduce((acc, current)=>acc+current, 0)arr.reduce(callback( accumulator, currentValue[, index[, array]] )[, initialValue])