如何计算总小时数？

发布于 2025-01-31 09:25:20 字数 624 浏览 0 评论 0原文

我正在尝试计算阵列的总小时数。阵列包含一系列会话，需要不同的时间来得出结论。我可能遇到的问题是小时字段是字符串。

这就是外观：

[
    { "id": 1,
    "exercise": "1.1",
    "name": "Session one",
    "hours": "1"
    },
    { "id": 2,
    "exercise": "1.2",
    "name": "Session two",
    "hours": "4"
    },
    { "id": 3,
    "exercise": "1.3",
    "name": "Session three",
    "hours": "0,5"
    }
]

总计应达到5,5小时。

我试图过滤阵列：

 computed: {
    hours(){
        var hours = 0
        this.oft.filter((item => {
            hours += item.hours
        }))
        return hours
    }
},

但是它返回了一个荒谬的高数字。

原文

I'm trying to calculate the total amount of hours from an array. The array contains a series of sessions that take different time to conclude. The problem that I might have, is that the hour field is a string.

This is how it looks like:

[
    { "id": 1,
    "exercise": "1.1",
    "name": "Session one",
    "hours": "1"
    },
    { "id": 2,
    "exercise": "1.2",
    "name": "Session two",
    "hours": "4"
    },
    { "id": 3,
    "exercise": "1.3",
    "name": "Session three",
    "hours": "0,5"
    }
]

And the totalt should amount to 5,5 hours.

I have tried to filter the array:

 computed: {
    hours(){
        var hours = 0
        this.oft.filter((item => {
            hours += item.hours
        }))
        return hours
    }
},

But it returns a ridiculous high number.

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水水月牙 2025-02-07 09:25:20

我观察到您的输入ID 3小时无法转换为呈现方式的数字coz，它应该为0.5而不是0,5，并且如果您想要要查找总小时数，过滤器不是您的方法，您需要在给定数组上的单个值基库，但是过滤器返回新数组基础，您应该使用降低代码，就像这样

hours()
{
return this.arr.reduce((acc, curr) => {
        acc = acc + +curr.hours;
        return acc;
      }, 0);
},

。

I observed your input the id 3 hours couldn't be converted into a number coz of the way it is presented it should be 0.5 instead of 0,5 and if you want to find the total number of hours filter is not your method you want single value base on given array but filter returns new array base on condition you should use reduce the code would be like this `

hours()
{
return this.arr.reduce((acc, curr) => {
        acc = acc + +curr.hours;
        return acc;
      }, 0);
},

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笑咖 2025-02-07 09:25:20

您可以使用降低

来知道0,5不是有效的数字，因此您必须用， 。<<<<。 /代码>为了正确解析

const data= [

    { "id": 1,
    "exercise": "1.1",
    "name": "Session one",
    "hours": "1"
    },
    { "id": 2,
    "exercise": "1.2",
    "name": "Session two",
    "hours": "4"
    },
    { "id": 3,
    "exercise": "1.3",
    "name": "Session three",
    "hours": "0,5"
    }
]


const total = data.reduce((res, {hours}) => res + parseFloat(hours.replace(',', '.')), 0.)

console.log(total)

you can do it with reduce

be aware that 0,5 is not a valid number so you have to replace , with .in order to parse it correctly

const data= [

    { "id": 1,
    "exercise": "1.1",
    "name": "Session one",
    "hours": "1"
    },
    { "id": 2,
    "exercise": "1.2",
    "name": "Session two",
    "hours": "4"
    },
    { "id": 3,
    "exercise": "1.3",
    "name": "Session three",
    "hours": "0,5"
    }
]


const total = data.reduce((res, {hours}) => res + parseFloat(hours.replace(',', '.')), 0.)

console.log(total)

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