count: function() { var that = this; var list = this.rbars; var allcount = 0; //被选中个数 var len = list.length; //加入购物车个数 var totalmoney = 0; var discount = 0; for(var i = 0; i < len; i++) { if(list[i].ischecked) { var c = list[i].count; //个数 allcount += parseInt(c); var p = list[i].price; totalmoney += c * p;}是什么意思
时间: 2024-01-04 11:01:52 浏览: 30
这段代码是一个 JavaScript 的函数,用于计算购物车中被选中的商品数量、总价和折扣。具体说明如下:
- 首先定义了一个变量 that,用于存储当前对象的引用。
- 然后获取了购物车中所有商品的列表 list,以及列表的长度 len。
- 接着定义了三个变量:allcount 表示被选中的商品数量,totalmoney 表示购物车中所有商品的总价,discount 表示折扣。
- 使用 for 循环遍历购物车中的每个商品,判断是否被选中(即 ischecked 属性为 true),如果是则累加数量和总价。
- 最后返回一个对象,包含被选中的商品数量、总价和折扣。
相关问题
count: function() { var that = this; var list = this.rbars; var allcount = 0; //被选中个数 var len = list.length; //加入购物车个数 var totalmoney = 0; var discount = 0; for(var i = 0; i < len; i++) { if(list[i].ischecked) { var c = list[i].count; //个数 allcount += parseInt(c); var p = list[i].price; totalmoney += c * p;
This code snippet seems to be a JavaScript function called "count". It starts by creating a variable "that" which is a reference to the current object (presumably the object that this function is a method of). It then creates another variable "list" which is presumably an array of items that this function is meant to count.
The function proceeds to initialize a few more variables: "allcount" (which will keep track of the total number of selected items), "len" (which is the length of the "list" array), "totalmoney" (which will keep track of the total cost of all selected items), and "discount" (which is currently set to 0 but may be used to track any discounts later in the function).
The function then proceeds to loop through each item in the "list" array using a for loop. For each item, it checks if the "ischecked" property is true (presumably indicating that the item has been selected). If it is, the function adds the item's count and price to the "allcount" and "totalmoney" variables, respectively.
The function then ends without returning anything. It is possible that this function is meant to update some UI elements on the page (e.g. displaying the total number of selected items or the total cost), but without more context it is difficult to say for sure.
switchClick: function(e) { var that = this; var idx = e.currentTarget.dataset.idx; var list = this.rbars; list[idx].ischecked = !list[idx].ischecked; var aaa;
这段代码是一个小程序中的函数,它实现了点击列表项时对列表项进行选中或取消选中的功能。具体来说,当用户点击列表项时,该函数会获取当前点击项的索引(idx),然后根据该索引找到对应的列表项(list[idx]),将该项的 ischecked 属性由原来的值取反,以实现选中或取消选中的效果。最后,该函数会将修改后的列表项数组(list)赋值给当前组件实例的 rbars 属性,并更新页面数据。同时,该函数定义了一个变量 aaa,但是并没有在函数中使用,可能是未完成的代码。
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