};//median([5,6,50,1,-5]) -> 5//median([0,10,-2,7]) -> 3.5 Nth element of array (获取数组的第N个元素) 使用Array.slice()获取数组的第 n 个元素。如果索引超出范围,则返回[]。省略第二个参数n,将得到数组的第一个元素。 JavaScript代码: const nth = (arr, n=0) => (n>0? arr...
Median of array of numbers (获取数字数组的中值) 找到数字数组的中间值,使用 Array.sort() 对值进行排序。如果 length 是奇数,则返回中间值数字,否则返回两个中间值数值的平均值。 JavaScript 代码: const median = arr => { const mid = Math.floor(arr.length / 2), nums = arr.sort((a, b) =>...
Javascript Array median() Array.prototype.median =function() { this.sort();//www.java2s.comif(this.length% 2 === 0) {varmiddle = this.length/ 2 - 1;return(this[middle] + this[middle + 1]) / 2; } else {varmiddle =Math.floor(this.length/ 2);returnthis[middle]; } }; ...
UNIQUEARRAY(array):去重,去掉数组array中的重复元素,以保留第一次出现的元素为序,返回去重之后的数组。 示例: UNIQUEARRAY([14, 2, 3, 4, 3, 2, 5, 6, 2, 7, 9, 12, 3])返回[14, 2, 3, 4, 5, 6, 7, 9, 12]。 报表函数 1. CNMONEY CNMONEY(number,unit)返回人民币大写。 number:需要...
describe('Array', function () { describe('#indexOf()', function () { it('should return -1 when the value is not present', function () { assert.equal(-1, [1, 2, 3].indexOf(5)); assert.equal(-1, [1, 2, 3].indexOf(4)); ...
Given an array of numbers and a range, the goal is to calculate the mean of all the numbers within that range. This problem can be approached in various ways, but in this tutorial, we will explore a simple and efficient solution using JavaScript. We will begin by defining the problem in...
var findMedianSortedArrays = function(nums1, nums2) { let num = nums1.concat(nums2); num = num.sort((a, b) => a - b); let mid = Math.floor(num.length / 2); if (num.length % 2 === 0) { return (num[mid-1] + num[mid])/2 ...
// Find a pivot as the median of first, last and middle element. var v0 = a[from]; var v1 = a[to - 1]; var v2 = a[third_index]; var c01 = comparefn(v0, v1); if (c01 > 0) { // v1 < v0, so swap them.
function convertToPixelsArray(imgData) { const data = imgData.data; const pixels = []; const [min, max] = [5, 250]; //像素点RGB值不在此范围内的进行过滤 范围可选 for (let i = 0; i < data.length; i += 4) { const r = data[i]; const g = data[i + 1]; const b = ...
let targetArray = [ { key: '1', value: 'value1' }, { key: '2', value: 'value2' }, ]; let sourceArray = [ { key: '3', value: 'value3' }, { key: '4', value: 'value4' }, ]; 接下来,使用forEach()方法遍历要推送的数组。