array.push(item) 返回新数组的新长度 ❌returnacc.includes(item) ? acc : acc.push(item); }, []); https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push refs https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce ...
题目:Given a sorted array, remove the duplicates in place such that each element appear onlyonceand return the new length. Do not allocate extra space for another array, you must do this in place with constant memory. For example,Given input arraynums=[1,1,2], Your function should return...
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push refs https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce https://stackoverflow.com/questions/9229645/remove-duplicate-values-from...
AI代码解释 constmapOfNicknames={};array.forEach((e)=>{constnick=e.user.nickname;// check if nick already exists in mapif(!mapOfNicknames[nick]){mapOfNicknames[nick]=e;}});// at this point, mapOfNicknames has a unique listconstuniqueArray=Object.keys(mapOfNicknames).map(k=>mapOfNick...
37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 参考链接:https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array-ii/solution/shan-chu-pai-xu-shu-zu-zhong-de-zhong-fu-xiang-i-7/
const array = [1, 2, 3, 2, 4, 1]; const uniqueArray = [...new Set(array)]; console.log(uniqueArray); // [1, 2, 3, 4] 2. 使用filter方法 filter方法创建一个新数组,其包含通过所提供函数实现的测试的所有元素。可以利用这个方法和indexOf方法来去重。
const hide2 = (el) => Array.from(el).forEach(e => (e.style.display = 'none')); // 事例:隐藏页面上所有``元素? hide(document.querySelectorAll('img')) 2.如何检查元素是否具有指定的类? 页面DOM里的每个节点上都有一个classList对象,程序员可以使用里面的方法新增、删除、修改节点上的CSS类...
[...Array(3).keys()] // [0, 1, 2] 9. 返回一个键盘 // 用字符串返回一个键盘图形 (_=>[..."`1234567890-=~~QWERTYUIOP[]\\~ASDFGHJKL;'~~ZXCVBNM,./~"].map(x=>(o+=`/${b='_'.repeat(w=x<y?2:' 667699'[x=["BS","TAB","CAPS","ENTER"][p++]||'SHIFT',p])}\\|`...
remove duplicates from union -type x = boolean[] | A | string | A | string[] | boolean[]; +type x = boolean[] | A | string | string[];convert generic to shorthand(why) interface A { - x: Array<X>; + x: X[]; }...
.lookup([])- quick find for an array of string matches .autoFill()- create type-ahead assumptions on the document Tag .tag('')- Give all terms the given tag .tagSafe('')- Only apply tag to terms if it is consistent with current tags ...