如何用break控制循环让console.log(sum)的值是不一样的呢

Question

var a = [1, 2, 3, 4, 5, 6, 7, 8];sum = [];array = parseInt(10 * Math.random());for (var j = 0; j < 3; j++) {    for (var i = 0; i < a.length; i++) {               sum[i] = a[i];        if (i == array) {            break        };    }    console.log(sum);} 

Answer 1

break 是可以去掉的…

let arr = [1, 2, 3, 4, 5, 6, 7, 8]

let result = []

for (let i = 0; i < arr.length - 1; i++) {

  // 每次循环重置 result

  result = []

  for (let j = 0; j < arr.length; j++) {

    result.push(arr[j])

    if (j >= i) break

  }

  console.log(result)

}