KnockoutJS 交换数组里元素的数据（实现上移，下移功能）

knockoutjs-updown-array.js

function FilesViewModel() {
  var self = this;

  self.fileServers =ko.observableArray([{"url":"http://192.168.109.130/4337/"},{"url":"http://192.168.109.122/3366/"}});

  self.upFileServer = function() {
        var index = self.fileServers.indexOf(this);
        if(index > 0){
            var temp = self.fileServers()[index-1];
            self.fileServers.splice(index-1, 1);
            self.fileServers.splice(index, 0, temp);
        }
    };

  self.downFileServer = function() {
      var index = self.fileServers.indexOf(this);
      if(index < self.fileServers().length-1){
          var temp = self.fileServers()[index];
          self.fileServers.splice(index, 1);
          self.fileServers.splice(index+1, 0, temp);
      }
  };
}