LeetCode 1470. Shuffle the Array

題目

Input: nums = [2,5,1,3,4,7], n = 3
Output: [2,3,5,4,1,7] 
Explanation: Since x1=2, x2=5, x3=1, y1=3, y2=4, y3=7 
then the answer is [2,3,5,4,1,7].

解法思維

跑迴圈再依序加入

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

先用slice()拆分物件，再跑迴圈，依序加回去

var shuffle = function(nums, n) {
    let result=[]
    let x =nums.slice(0,n)
    let y=nums.slice(n)
    for (let i = 0; i < x.length; i++) {
        result.push(x[i],y[i]);
    }
    return result
};

slice()

arr.slice()
arr.slice(begin)
arr.slice(begin, end)

let fruits = ['Banana', 'Orange', 'Lemon', 'Apple', 'Mango'];
let fruit1 = fruits.slice(1);
let fruit2 = fruits.slice(1, 3);
let fruit3 = fruits.slice(-3);

// fruits contains ['Banana', 'Orange', 'Lemon', 'Apple', 'Mango']
// fruit1 contains ['Orange', 'Lemon', 'Apple', 'Mango']
// fruit2 contains ['Orange', 'Lemon']
// fruit3 contains ["Lemon", "Apple", "Mango"]