❮ KnockoutJS observable 可观察对象 KnockoutJS observable 可观察对象 ❯

KnockoutJS - slice() 方法

更新于 2025/1/16 5:07:17

描述

KnockoutJS Observable slice()方法切出一个数组的一部分。此处的切片与原生 JavaScript 切片函数相同。返回从起始索引到结束索引的元素。

语法

arrayName.slice(start-index,end-index)

参数

接受 2 个参数，起始索引和结束索引。

示例

<!DOCTYPE html>
   <head>
      <title>KnockoutJS ObservableArray slice method</title>
      <script src = "https://ajax.aspnetcdn.com/ajax/knockout/knockout-3.1.0.js"
         type = "text/javascript"></script>
   </head>

   <body>
      <p>Example to demonstrate slice() method.</p>
      
      <p>slice(1,3) to show items starting from index 1 up to 3:
         <span data-bind = "text: empArray().slice(1,3)"></span>
      </p>
      
      <p>Array of employees: <span data-bind = "text: empArray()" ></span></p>

      <script>
         function EmployeeModel() {
            this.empName = ko.observable("");
            this.chosenItem = ko.observableArray("");
            this.empArray = ko.observableArray(['Scott','James','Jordan','Lee',
               'RoseMary','Kathie']);
         }

         var em = new EmployeeModel();
         ko.applyBindings(em);
      </script>
      
   </body>
</html>