Question

当执行以下ViewModel函数时，错误 Uncaught TypeError：self.deleteInvisibleColumns不是函数被引发 - 为什么会这样？

function ViewModel(vm) {
    var self = this;

    this.rows = ko.observableArray(vm.Rows);
    self.deleteInvisibleColumns();

    this.deleteInvisibleColumns = function () {
        for (var i = 0; i < vm.Rows.length; i++) {
            var row = vm.Rows[i];

            var keys = Object.keys(row);
            for (var k = 0; k < keys.length; k++) {
                if (vm.VisibleColumns.indexOf(keys[k]) === (-1)) {
                    delete row[keys[k]];
                };
            };
        };
    };

Answer 1

试试这个：

在callint之前删除函数定义

对函数定义使用“self”并调用它

function ViewModel(vm) {

    var self = this;

    this.rows = ko.observableArray(vm.Rows);

    self.deleteInvisibleColumns = function () {
        for (var i = 0; i < vm.Rows.length; i++) {
           var row = vm.Rows[i];

           var keys = Object.keys(row);
           for (var k = 0; k < keys.length; k++) {
              if (vm.VisibleColumns.indexOf(keys[k]) === (-1)) {
                 delete row[keys[k]];
              };
          };
      };
    };

    self.deleteInvisibleColumns();
};

未定义不是这个和自我的功能用途

1 个答案: