cyclic array
arr = [
[1, 2],
[3, 4],
]
output [13,14,23,34] ;
cyclic array
arr = [
[1, 2],
[3, 4],
[5, 6],
]
output [135136145146235236245246]
loop is unknown, and the length of each subarray of the array is unknown.
do you want to write a general method?
use the array reduce method
let arr = [[1,2], [3,4], [5,6]]
let list = []
arr.reduce ((pre, current, index, arr) = > {
list = []
for (let i = 0; i < pre.length; iPP) {
for (let j = 0; j < current.length; jPP) {
list.push(+(pre[i] + '' + current[j]))
}
}
return list})
console.log (list)
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