方法一:
var values = ['东南亚','南亚','东北亚','欧洲','美澳','中东非','亚洲'];
var num = 3;
var cities = new Array(Math.ceil(values.length/num));
for(var i = 0; i < num; i++) {
cities[i] = [];
for(var j = 0; j < num; j++){
cities[i][j] = '';
}
}
for(var k = 0; k < values.length; k++){
cities[parseInt(k/num)][k%num] = values[k];
}
console.log(cities);
方法二:
const arr = [1, 2, 3, 4, 5, 6, 7, 8,];
const result = arr.reduce((acc, cur, i) => {
if (i % 3 === 0) {
acc.push([cur]);
} else {
acc[acc.length - 1].push(cur);
}
return acc;
}, []);
console.log(result);