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最新文章列表
(转)[Java] Java中List.remove报UnsupportedOperationException异常
转自:https://www.cnblogs.com/liuriqi/p/4039173.html
今天项目中有个需求场景:
A和B都是List,而B是A的子集,现在想求A和B的差集。
想到了List中提供的removeAll()方法可以求得差集,但是结果确报了UnsupportedOperationException异常。
仔细分析了下,List A我是通过数组经过Arrays ...
数组去重
var arr = ['0','1','2','3','0'];
function rep(arr){
var new_arr = [arr[0]];
for (var i = 0; i < arr.length; i++) {
if(new_arr.indexOf(arr[i]) == -1 ){
new_arr.push(arr[i]);
}
}
...
[转] remove on List created by Arrays.asList throws UnsupportedOperationException
原文地址:https://stackoverflow.com/a/7885607/6091500
将
arrayList = Arrays.asList(list);
替换成
arrayList = new ArrayList(Arrays.asList(list));
原因:参见 Arrays.asList 的 JavaDoc。
引用Returns a fixed-size list back ...
237. Delete Node in a Linked List
237. Delete Node in a Linked List
Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
Supposed the linked list is 1 -> 2 -> 3 -> 4 a ...
1. Two Sum
1. Two Sum
Given an array of integers, return indices of the two numbers such that they add up to a specific target.
You may assume that each input would have exactly one solution.
Example:
Giv ...
26. Remove Duplicates from Sorted Array
26. Remove Duplicates from Sorted Array
Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.
Do not allocate extra space for anothe ...
27. Remove Element
27. Remove Element
Given an array and a value, remove all instances of that value in place and return the new length.
Do not allocate extra space for another array, you must do this in place with co ...
203. Remove Linked List Elements
203. Remove Linked List Elements
Remove all elements from a linked list of integers that have value val.
ExampleGiven: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6Return: 1 -- ...
模拟JavaScript Array实现的List
模拟JavaScript中的Array对象
主要实现了pust,pop.shift,forEach,concat,slice等方法,后续在更新
'use strict'
function List() {
this.length = 0;
if (arguments.length === 1) {
if (typeof(arguments[0]) === ...
关于js数组的学习
昨天在做项目的时候,遇到一个这样的需求,简单说来就是:有两个数组,a和b,将a数组中和b数组中相同的对象元素删除,因为数组保存的是对象,两个数组之间的联系就在对象中userId,在遍历删除的时候,
1. 开始用了splice()方法,结果就是始终都删不完,原因是因为splice删除后返回新的数组,但是计数的i还是一开始的数组长度,所以当删除到一半+1的时候后面的就删除掉了。
2. de ...