如何在javascript中格式化（大）数字？

Question

数据库调用返回此json格式的数据：

[{"expense_project_id":1,"project_id":1,"project_name":"miki project 1","item_amount":"0.7607479E5","item_count":7},{"expense_project_id":1,"project_id":2,"project_name":"project 2","item_amount":"0.7607479E5","item_count":7}] 

我想格式化项目数量，以便它出来，例如，`21.87我试过这个：

parseFloat(this["this_amount"]).toFixed(2)

并且，在HTML页面中，我得到NaN

我该如何解决它？谢谢。

`

Answer 1

要格式化“项目金额”，请在代码中将"this_amount"更改为"item_amount"：

parseFloat(this["item_amount"]).toFixed(2)

Answer 2

你的变量是一个数组，所以你应该这样做：

var arr = [{"expense_project_id":1,"project_id":1,"project_name":"miki project 1","item_amount":"0.7607479E5","item_count":7},{"expense_project_id":1,"project_id":2,"project_name":"project 2","item_amount":"0.7607479E5","item_count":7}];

console.log(parseFloat(arr[0]["item_amount"]).toFixed(2))

Answer 3

使用此item_amount在您的结果中找不到this_amount

var arr = [{"expense_project_id":1,"project_id":1,"project_name":"miki project 1","item_amount":"0.7607479E5","item_count":7},{"expense_project_id":1,"project_id":2,"project_name":"project 2","item_amount":"0.7607479E5","item_count":7}];

console.log(parseFloat(arr[0]["item_amount"]).toFixed(2));