本文共 1012 字，大约阅读时间需要 3 分钟。

function shuffle(nums, n){  let arr0 = nums.slice(0, n);  let arr1 = nums.slice(n, 2*n);  for(let i = 0; i < 2*n; i++){    nums[i] = arr0[i/2];    nums[i+1] = arr1[i/2];    i++;  }  return nums;}let nums0 = [1,2,3,4,4,3,2,1];let nums1 = [2,5,1,3,4,7];let nums2 = [1,1,2,2];let n = 4

function shuffle(nums, n){  let arr0 = nums.splice(n);  let arr1 = [];  for(let i = 0; i < n; i++){    arr1.push(nums[i]);    arr1.push(arr0[i]);  }  return arr1;}

没有自己写的效率高

function fairCandySwap(A, B){  let a = A.reduce(function(pre, cur){    return pre + cur;  },0);  let b = B.reduce(function(pre, cur){    return pre + cur;  },0);  if(a > b){    let c = (a-b)/2;    for(let i = 0; i < A.length; i++){      if(B.indexOf(A[i] - c) !== -1){        let d = B.indexOf(A[i] - c);        return [A[i], B[d]];      }    }  }else{    let c = (b-a)/2;    for(let i = 0; i < A.length; i++){      if(B.indexOf(A[i] + c) !== -1){        let d = B.indexOf(A[i] + c);        return [A[i], B[d]];      }    }  }}let A = [1,2,5]let B = [2,4]

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