如果你的列表项是纯函数形式,即仅依赖外部props,也没有内部依赖的(例如input的临时输入值),你可以选择使用默认的index来最大程度复用组件。 如果你的列表项有内部状态(即在某些时刻相同的props会导致不同的render结果),请使用该列表项对应的唯一的值作为key,例如从数据库中取到的id。 前置知识点1:React/Vue 使用...
key 的作用主要表现在以下这段源码中。 /* vue/src/core/vdom/patch.js */functionupdateChildren(parentElm,oldCh,newCh,insertedVnodeQueue,removeOnly){letoldStartIdx=0letnewStartIdx=0letoldEndIdx=oldCh.length-1letoldStartVnode=oldCh[0]letoldEndVnode=oldCh[oldEndIdx]letnewEndIdx=newCh.length-1le...
{"maxIndexSize":1000000,"ignoreSpecialCharacters":false},"codeblock-disable-glossary":{},"fontsettings":{"theme":"white","family":"sans","size":2},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","...
idxInOld, vnodeToMove, refElm // removeOnly is a special flag used only by <transition-group> // to ensure removed elements stay in correct relative positions // during leaving transitions const canMove = !remove
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然后同样的选中,右键选择Copy Special选项,然后选择Byte String(No Spaces),取出去除空格之后的字符串。 得到第三个参数结果为:358790034519f8c8235db6492839a73f。 第三个参数为AES加解密的向量IV值,选中,双击进入。 0040259c 21 38 40 00 move a3=>DAT_00402e58,v0 = 98h ...
Public key objects that are distributed through Group Policy are stored in special areas of the registry and appear in the logical stores for users, computers, and services. When you use Group Policy, separate CTLs can be created for users and computers. The CTLs for users are not shared ...
Public key objects that are distributed through Group Policy are stored in special areas of the registry and appear in the logical stores for users, computers, and services. When you use Group Policy, separate CTLs can be created for users and computers. The CTLs for users are not shared ...
(downLoadH5Handler); downLoadH5Handler = null; } }; // 需微信特殊处理的版本 var wxSpecial = function () { if (/MicroMessenger/ig.test(userAgent)) { if (/iphone os ([0-9]+)_/i.test(userAgent) && parseInt(RegExp.$1, 10) >= 9) { var wxVersion = userAgent.match(/Micro...