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Merge two ordered lists into a new ordered list and return. The new linked list is composed of all nodes of two given linked lists.   Example: Input: 1 - > 2 - > 4, 1 - > 3 - > 4 Output: 1 - > 1 - > 2 - > 3 - > 4 - > 4   /** * Definition for singly-linked list. * function ListNode(val) { ...

In fact, it is not a difficult technology to build a Web multi-room chat room. With the help of websocket s, it is easy to achieve multi-user real-time online communication interaction. Here we mainly introduce how to make this function more simple and efficient with the support of BeetleX and BeetleXjs.Next, I'll walk you through the implement ...

Author| Jeskson Source|Dada Front End Bistro JavaScript array object An array object is a variable type used to store multiple values in a single variable. Syntax for creating array objects: new array(); new array(size); new array(element0, element1, ..., elementn); The parameter size represents the number of array elements, returns the arr ...

Each function object has a prototype property, but ordinary objects do not have a prototype property. There is a constructor under the prototype, pointing to this function Each person object has an internal attribute named [[prototype]], which points to the prototype object of th ...

Deep understanding of javascript object prototypes and constructors Object creation process When you call the F constructor with the new operator, you go through the following steps: 1. Create an empty object as the instance object to be returned 2. Point the prototype of the empty object to the prototype property of the co ...

Angular scope object and controller object Based on AngularJS v1.2.29 Scope object It is a js instance object, and the ng app instruction creates a root scope object ($rootScope) by default Its properties and methods are associated with instructions or expressions on the page Controller object Is a js instance object u ...

Encapsulate slow motion animation function - add multiple arbitrary attributes   On the basis of adding any attribute to the original slow motion animation function, the following changes have been made 1. The original function animate(element, attr, target), three variables, is replaced by json object to install a pair: attribute: the value of ...

1. Foreword: Apter.Js is a lovely and beautiful Js music player. I've learned and made some of it before. Now I use mp3 format to develop it in. Net. Pipe network https://aplayer.js.org/ 2. Start with: Just add a jQuery.js and APlayer.min.js and APlayer.min.css to the project. Look at a simple Chestnut: <link rel="stylesheet" href="~/S ...

Promise is the fifth day of "14nodejs (7 days)", but promise is not the content of Node.js, but the new API of ECMScript6 Callback Hell Callback region one asynchronous request needs another asynchronous request result $.ajax({url, success: function () { ... }}) $.ajax({url, success: function () { ... }}) $.ajax({url, success: functio ...

basic operation Added and improved var a= new Array();　//Create an array a[0]=1;//Specify modifications directly a.push(1); //Add one directly to the last Delete //arrayObj.splice(deletePos,deleteCount); //Delete elements of a specified number of deleteCounts starting at the specified location deletePos, returning the removed elements ...