5.利用数组的filter()+indexOf() filter方法会对满足条件的元素存放到一个新数组中,结合indexOf方法进行判断。 filter()方法:会创建一个新数组,其包含通过所提供函数实现的测试的所有元素。 function removeDuplicate(arr) { return arr.filter((item, index) => { return arr.indexOf(item) === index }) ...
具体实现可参考:https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/includes简单测试includes()对NaN的判断:const testArr = [1, 'a', NaN] console.log(testArr.includes(NaN)) // true 5.利用数组的filter()+indexOf()filter方法会对满足条件的元素存放到一个新数组...
filterDuplicate(arr) { //判断数组中是否有重复对象 let n = 0; let len = arr.length; if (len === 0) { return 100; } let r = arr.findIndex( (item) => item.RegionId == -1 || item.ProvinceId == -1 || item.CityId == -1 || item.CountyId == -1 || item.FullAddress ...
Write a function that takes an array (a) and a value (b) as argument The function should clean a from all occurrences of b Return the filtered array 我的提交(作者答案) functionmyFunction(a, b) {returna.filter(item=>item !== b);} 涉及知识(filter()方法,箭头函数)# array.filter()方...
.filter(fn)- return only the phrases that return true .find(fn)- return a document with only the first phrase that matches .some(fn)- return true or false if there is one matching phrase .random(fn)- sample a subset of the results ...
objects (default: true)— compact duplicate keys in object literals. passes (default: 1)— The maximum number of times to run compress. In some cases more than one pass leads to further compressed code. Keep in mind more passes will take more time. properties (default: true)— rewrite pro...
$.type(object) ⇒ string Get string type of an object. Possible types are: null undefined boolean number string function array date regexp object error. For other objects it will simply report “object”. To find out if an object is a plain JavaScript object, use isPlainObject.add...
--comments [filter] Preserve copyright comments in the output. By default this works like Google Closure, keeping JSDoc-style comments that contain "@license" or "@preserve". You can optionally pass one of the following arguments to this flag: ...
Type: Bug Upon opening a TypeScript project in VS Code, I receive a popup error stating: "The JS/TS language service immediately crashed 5 times. The service will not be restarted." The source of the error is the TypeScript and JavaScrip...
objects (default: true)— compact duplicate keys in object literals. passes (default: 1)— The maximum number of times to run compress. In some cases more than one pass leads to further compressed code. Keep in mind more passes will take more time. properties (default: true)— rewrite pro...