winget search WhatsApp -s=msstore
const arr = [[10,30],[20,60]]
function func(arr) {
const tmp = []
arr.map((item) => {
item.map(el => {
tmp.push(el)
});
});
arr.length = tmp.length
tmp.map((item, i) => {
arr[i] = item
})
}
func(arr)
console.log(arr)