小编Sam*_*Sam的帖子

我想要做的是:

<input data-bind="value: Adult.FirstName, visible: editable" />
<span data-bind="text: Adult.FirstName, visible: !editable"></span>

viewModel = kendo.observable({
    editable: false
});

但我得到错误:

Uncaught SyntaxError: Unexpected token !

我能够弄清楚如何做到这一点的唯一方法是:

<input data-bind="value: Adult.FirstName, visible: editable" />
<span data-bind="text: Adult.FirstName, visible: not('editable')"></span>

viewModel = kendo.observable({
    editable: false,
    not: function(value) { return !this.get(value);},
});

和:

<input data-bind="value: Adult.FirstName, visible: editable" />
<span data-bind="text: Adult.FirstName, visible: notEditable"></span>

viewModel = kendo.observable({
    editable: false,
    notEditable: function() { return !this.get("editable");},
});

但我宁愿只跟踪一个没有额外功能的变量.

如何在按行操作时应用能够"看到"前面结果的函数？

这出现了很多,但我目前的问题需要学生运行总计,如果总数没有达到5则重置.

示例数据:

> df

row   Student Absent Consecutive.Absences                             
1        A       0                    0                              
2        A       1                    1                              
3        A       1                    2                              
4        A       0                    0 <- resets to zero if under 5
5        A       0                    0                              
6        A       1                    1                              
7        A       1                    2                              
8        A       1                    3                              
9        B       1                    1 <- starts over for new factor (Student)
10       B       1                    2                              
11       B       0                    0                              
12       B       1                    1                              
13       B       1                    2                              
14       B       1                    3                              
15 …