unique: 数组去重,返回一个新数组 functionunique(arr){if(!isArrayLink(arr)){//不是类数组对象returnarr }letresult = []letobjarr = []letobj =Object.create(null) arr.forEach(item=>{if(isStatic(item)){//是除了symbol外的原始数据letkey = item +'_'+getRawType(item);if(!obj[key]){ obj...
function unique(arr){ if(!isArrayLink(arr)){ //不是类数组对象 return arr } let result = [] let objarr = [] let obj = Object.create(null) arr.forEach(item => { if(isStatic(item)){//是除了symbol外的原始数据 let key = item + '_' + getRawType(item); if(!obj[key]){ obj[...
使用Array.prototype.filter方法是另一种常见的数组去重方法。这种方法虽然不如 Set 方法直接,但它在处理更复杂的去重逻辑时显得更为灵活。 const uniqueNumbers = numbers.filter((item, index, array) => array.indexOf(item) === index); console.log(uniqueNumbers); // 输出: [1, 2, 3, 4, 5] 这...
We can get the unique values from an array using the Set(), indexOf() and filter() functions in JavaScript.
创建一个JavaScript对象及新数组 使用for循环遍历原数组,每次取出一个元素与JavaScript对象的键做对比 如果不包含,将存入对象的元素值推入到结果数组中,并且将存入对象的该key的value设为1 Array.prototype.unique=function() {varret = [];varlen =this.length;vartmp = {};for(vari=0; i<len; i++){if(...
[Tips + Javascript] Make a unique array To make an array uniqued, we can use Set() from Javascript. const ary = ["a", "b", "c", "a", "d", "c"]; console.log(newSet(ary)); We can see that all the duplicated value have been removed, now the only thing we need to do ...
object deep clone array async map find by key try catch compact difference intersecion promise defer open is truthy View more alisahinozcelikpublished 3.0.5 • a month agopublished 3.0.5 a month ago M Q P @n3okill/utils Many javascript helpers array chunk clone deep combine unique contains...
If you want filter based on the whole object then we can use the JSON.stringify() to get the unique items. let arr = [{name:'prashant', age: 15}, {name:'sachin', age: 16}, {name:'prashant', age: 16}, {name:'prashant', age: 16}, {name: 'pranav', age: 12}]; let Uni...
Since we are returning a new object, we describe the resulting object in the form{ [K in keyof T]: ... }. Then we have to judge the Value type. In order to prevent the effect ofnever, we wrap a layer of array to judge:
Previous:Creates an object from an array, using the specified key and excluding it from each value. .Next:Permutations of an array elements What is the difficulty level of this exercise? Based on 25 votes, average difficulty level of this exercise is Easy . ...