https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/splice constmonths = ['Jan','March','April','June'];// remove last one itemmonths.splice(months.length-1,1);// ["June"]console.log(months);// ["Jan", "March", "April"] constmonths = ['Jan',...
可以通过在Array的原型上添加方法来达到删除的目的。 Array.prototype.remove = function(dx) {if(isNaN(dx) || dx >this.length){returnfalse;}for(vari =0, n =0; i <this.length; i++) {if(this[i] !=this[dx]) {this[n++] =this[i];}}this.length -=1;};varcolors = ["red","blue...
array(可选):调用filter的数组。 thisArg(可选):执行callback时使用的this值。 示例代码: 代码语言:txt 复制 let arr = [1, 2, 3, 4, 5]; let newArr = arr.filter(item => item !== 3); // 删除值为3的元素 console.log(newArr); // 输出: [1, 2, 4, 5] ...
const sortedArray = array.sort((a, b) => a.localeCompare(b)); 问题:删除重复项后数组顺序改变 原因:使用 Set 进行去重会打乱原有顺序。 解决方法:使用 filter 方法结合 indexOf 来保持原有顺序。 代码语言:txt 复制 const uniqueArray = array.filter((item, index, self) => self.indexOf(item) =...
array.flat(n)是es10嵌入层叠的api,n表示尺寸,n变化infinity时维度为无限大 2.开始篇 function flatten ( arr ) { while (arr.some( item => array .isarray(item))) { arr = [].concat(...arr); } return arr; } flatten([ 1 ,[ 2 , 3 ]]...
formats: an array of objects representing types of files, with the following properties: formatID: a string that uniquely identifies the format (may be the same as mimeType) mimeType (optional): the file format's designated media type, e.g. "image/png" (palette formats do not have ...
Heap.heapify(array, comparator?)that converts an array to an array-heap. Heap.heappop(heapArray, comparator?)that takes the peek of the array-heap. Heap.heappush(heapArray, item, comparator?)that appends elements to the array-heap.
/*** 格式化文件大小* @param {number} size 文件原始大小,单位为 B* @param {object} options 需要的参数* options {string} unit 返回带的单位* options {boolean} isNum 返回的是否是 number(不带单位)* options {number} digit 小数保留位数* @returns*/exportfunctionformatFileSize(size,options={}){...
const moveItemInArray = <T>(array: T[], from: number, to: number) => { const item = array.splice(from, 1)[0]; nextTick(() => array.splice(to, 0, item)); }; onEnd(event) { moveItemInArray(store.state.items, event.oldIndex, event.newIndex) } You may also want to see ...
For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.toArray():String[]Serializes the sortable's item data-id's (dataIdAttr option) into an array of string....