JS finds the largest subsequence and

... . This is a written test. Given an array, find the sum of the largest contiguous subsequence in the array. For example, in the array [-2, 6, -1, 5, 4, -7, 2, 3], and the largest subsequence is [6, -1, 5, 4], and their sum is 14. function search(arr) { var maxSum = arr[0], sum = arr[0];...


Four essential skills for web front-end engineers, do you have it?

... Web front-end development engineer is a particularly popular demand position in the Internet industry. As a qualified web front-end development engineer, in addition to excellent technology, it also needs a good ability to communicate with related departments. . In particular, the...


Java realizes multi-file upload to local server

... 博主 is currently working on an intranet project, and internal access to external data, but external access to internal data, which also causes possible files can not be uploaded, so bloggers take a different approach, Create a folder on the local server dedicated to storing uploaded data...


Advanced component knowledge (controlled components, stateless components, high-level components, pure components)

... component advanced knowledge controlled components In the original form, the value of input It is set this way. < input value = " mapbar_front " /> And in this case, we can enter any value into the input. However, in react, if we give an initial value for input, it will not change...


[JS design mode] Singleton mode

... singleton mode is just like its name. A constructor constructs an object and then constructs the object using this constructor. It is not a new object, it is still the upper one. Once the object, it is popular to say that the singleton pattern implements a constructor that only creates...


The burdock news release system summary

... After a month of struggle, I finally knocked the burdock off and on. During this period, there are mixed self-study, soft test, operation and maintenance of some things, as well as professional courses. Speaking of recent studies, every day is really full of explosions. Not much...


Echars tree icon

... echars tree icon change: 1. Go to Ali to download the icon 2. I saw an example: 你跑了可以可以:图 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>echarts demo</title> <script type="text/javascript" src="http://apps.bdimg.com/libs...


Vue_ introduction and installation

... 一, what is vue.js? Vue.js is a library for building data-driven web interfaces. The goal of Vue.js is to implement responsive data binding and combined view components through the simplest possible API. At the heart of Vue.js is a responsive data binding system that keeps data...


EventUtil

... EventUtil is used to balance differences between different browsers to implement event differences or event methods. The following EventUtil object code is available for testing, and contains detailed comments [Click on the object Each method name (green font) can jump directly to the...


Vue identification (generating image verification code) plugin

... renderings are as follows: implementation process: 1. Write a subcomponent called identification.vue 2. subcomponent Register and reference 3. Use the subcomponent step1: identify.vue subcomponent of the main page, the code is as follows: <template> <div class="s-canvas"> ...