js code to simulate select drop-down menu control_javascript skills
<script><br><br> window.onload=function(){<br> var oflink = document.getElementById('sel');<br> var aDt = oflink.getElementsByTagName('dt');<br> var aUl = oflink.getElementsByTagName('ul');<br> var aH3= oflink.getElementsByTagName('h3');<br> for(var i=0;i<aDt.length;i ){<br> aDt[i].index = i;<br> aDt[i].onclick = function(ev){<br> var ev = ev || window.event;<br> var This = this;<br> for(var i=0;i<aUl.length;i ){<br> aUl[i].style.display = 'none';<br> }<br> aUl[this.index].style.display = 'block';<br> document.onclick = function(){<br> aUl[This.index].style.display = 'none';<br> };<br> ev.cancelBubble = true;<br><br> };<br> }<br> for(var i=0;i<aUl.length;i ){<br><br> aUl[i].index = i;<br><br> (function(ul){<br><br> var iLi = ul.getElementsByTagName('li');<br><br> for(var i=0;i<iLi.length;i ){<br> iLi[i].onmouseover = function(){<br> this.className = 'hover';<br> };<br> iLi[i].onmouseout = function(){<br> this.className = '';<br> };<br> iLi[i].onclick = function(ev){<br> var ev = ev || window.event;<br> aH3[this.parentNode.index].innerHTML = this.innerHTML;<br> ev.cancelBubble = true;<br> this.parentNode.style.display = 'none';<br> };<br> }<br><br> })(aUl[i]);<br> }<br><br> }<br> </script>

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Asynchronous processing method of SelectChannelsGo concurrent programming using golang Introduction: Concurrent programming is an important area in modern software development, which can effectively improve the performance and responsiveness of applications. In the Go language, concurrent programming can be implemented simply and efficiently using Channels and Select statements. This article will introduce how to use golang for asynchronous processing methods of SelectChannelsGo concurrent programming, and provide specific

How to hide the select element in jquery: 1. hide() method, introduce the jQuery library into the HTML page, you can use different selectors to hide the select element, the ID selector replaces the selectId with the ID of the select element you actually use; 2. css() method, use the ID selector to select the select element that needs to be hidden, use the css() method to set the display attribute to none, and replace selectId with the ID of the select element.

Machine learning makes computer graphics (CG) simulations more realistic! The method is called Neural Flow Maps (NFM), which can accurately simulate smoke with four vortices: more complex ones can also be easily realized: you know, in this era of AI applications flying all over the sky, CG physics simulation is still It is the world of traditional numerical algorithms. △NFM simulates "leapfrog". Although the application of neural networks in CG can create dazzling visual effects, it cannot strictly and robustly describe physical properties. △NFM simulates "ink droplets" It is precisely for this reason that physical simulation based on neural networks is still in the proof of concept stage, and the effects generated are far from SOTA. In order to solve this complex problem,

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Because select allows developers to wait for multiple file buffers at the same time, it can reduce IO waiting time and improve the IO efficiency of the process. The select() function is an IO multiplexing function that allows the program to monitor multiple file descriptors and wait for one or more of the monitored file descriptors to become "ready"; the so-called "ready" state is Refers to: the file descriptor is no longer blocked and can be used for certain types of IO operations, including readable, writable, and exceptions. select is a computer function located in the header file #include. This function is used to monitor file descriptor changes—reading, writing, or exceptions. 1. Introduction to the select function. The select function is an IO multiplexing function.

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Implementing SelectChannels through golang Performance optimization of Go concurrent programming In the Go language, it is very common to use goroutine and channel to implement concurrent programming. When dealing with multiple channels, we usually use select statements for multiplexing. However, in the case of large-scale concurrency, using select statements may cause performance degradation. In this article, we will introduce some implementations of select through golang
