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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                >[success] # 函數作為返回值 ~~~ 1.函數作為返回值使用,在一些'ui' 框架提供的一些方法上很實用,例如 'element-ui',用'element-ui'vue的tree舉個例子: <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree> 你會發現官方告訴你'node-click' 對應的使用方法是: handleNodeClick(data) { console.log(data); } 提出一個疑問,如果我想在傳值怎么辦? 2.這里可以發現'@node-click'接受的是一個函數,想傳值我們只要在外面在套一層函數,返回值是一個函數即可,描述有些含糊,寫成下面 <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick(1)"></el-tree> handleNodeClick(num) { return function(data){ console.log(num,data) } } 2.另一種思路,對一些具有函調函數作為參數函數近些一些擴展 function createComparisonFunction(propertyName){ return function(object1,object2){ var value1 = object1[propertyName]; var value2 = object2[propertyName]; if(value1<value2){ return -1; }else if(value1>value2){ return 1; }else{ return 0; } }; } var data = [{name:"Zachary",age:"28"},{name:"Nicholas",age:"29"}]; data.sort(createComparisonFunction("name")); alert(data[0].name); //Nicholas data.sort(createComparisonFunction("age")); alert(data[0].name); //Zachary ~~~
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                              哎呀哎呀视频在线观看