var arr = [13, 21, 32, 41, 50, 69];
let newarr = [];
for (let x = 0; x < 5; x++) {
for (let i = 0; i < arr.length; i++) {
newarr[x].push(arr[i]);
}
}
console.log(newarr);
Uncaught TypeError: Cannot read properties of undefined (reading 'push')
var arr = [13, 21, 32, 41, 50, 69];
let newarr = [];
for (let x = 0; x < 5; x++) {
newarr[x] = []; // 声明数组;
for (let i = 0; i < arr.length; i++) {
newarr[x].push(arr[i]);
}
}
console.log(newarr);