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最新文章列表
JS的四种数组去重方式
今天去面试,其他有这么一道题,给出一个js数组,然后把数组中重复的元素去掉。当时没怎么想到好方法,就直接用的循环套循环的方式做的,现在网上搜了一下,发现还有更好的方式,总共整理了四种:
function getArray(){
var arr = [];
for(var i = 0; i < 10000; i++){
arr[i] = (Math.random() ...
转:JS数组操作 & JAVA数组操作
JS中数组的操作
1、数组的创建
var arrayObj = new Array(); //创建一个数组
var arrayObj = new Array([size]); //创建一个数组并指定长度,注意不是上限,是长度
var arrayObj = new Array([element0[, element1[, ...[, elementN]]]]); 创建 ...
swift学习笔记——集合类型(数组)
<!--?xml version="1.0" encoding="UTF-8" standalone="no"?-->
数组
数组的声明:Array<SomeType> SomeType[]
var shoppingList: String[] = ["Eggs", "Milk& ...
Java编程之数组扩容
一、背景
数组在实际的系统开发中用的越来越少了,我们只有在阅读某些开源项目时才会看到数组的使用。在Java中,数组与List、Set、Map等集合类相比,后者使用起来方便,但是在基本数据类型处理方面,数组还是占优势的,而且集合类的底层也都是通过数组实现的。
我们大家都知道,在Java中数组是定长的,一旦初始化以后,就不可以改变其长度,而这在实际应用中是不方便的。举 ...
模拟实现JDK中的ArrayList
ArrayList是基于数组来实现的容器,与String类是基于字符数组的实现类似。
这里只是模拟ArrayList的存储结构实现,没有实现范型,统一都以Object表示。
代码如下:
package cn.mylava.myCollection;/** * 16/3/15. * * 模拟AbstractStringBuilder,编写ArrayList */public class ...
Bulls and Cows
You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each time your friend makes a guess, you provide a hint that ...
Product of Array Except Self
Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal to the product of all the elements of nums except nums[i].
Solve it without division and in O(n). ...
Summary Ranges
Given a sorted integer array without duplicates, return the summary of its ranges.
For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"].
从第一个元素开始,每次保留开始的元素 ...
Shell脚本,包含了[分支 循环 数组 搜索 运算等基本功能]
脚本内容
#!/bin/sh
currDate=(2016-02-08 2016-02-09 2016-02-10 2016-02-11 2016-02-12 2016-02-13 2016-02-14)
#currDate=(2016-02-08)
#currHour=(00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 ...
Rotate Array
Rotate an array of n elements to the right by k steps.
For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4].
将一个数组右移k步,如果我们直接移动k次,会超时。我们可以先反转后k个元素,然后在反转前length - ...
Find Minimum in Rotated Sorted Array II
Follow up for "Find Minimum in Rotated Sorted Array":
What if duplicates are allowed?
Would this affect the run-time complexity? How and why?
Suppose a sorted array is rotated at some pivot ...
Find Minimum in Rotated Sorted Array
Suppose a sorted array is rotated at some pivot unknown to you beforehand.
(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).
Find the minimum element.
You may assume no duplicate exists in the array ...
Merge Sorted Array
Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.
Note:
You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additiona ...
Remove Duplicate from Array(数组去重)
给定一个数组,判断是否存在重复元素,或者让你找出重复的元素。遇到这类问题我们应该先想用哈希表,位运算,双指针是否可以解决,根据具体的情况选择合适的方法。下面是leetcode中有关数组去重或查重的几道题目。
1,Contains Duplicate
给定一个数组,判断里面是否存在重复元素,如果存在就返回true,如果不存在就返回false.
既然是判断是否存在重复元素,我们首先想到哈希表,遍历数 ...