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VisualizaçõesCalculating sum of array objects in javascript , TypeError: parseInt(...).reduce is not a function
I have a array of objects with numbers but there type is string , I want to sum them all.
I'm doing this way as of previous answers on stack-overflow suggested.
// Here the data has an array of goods which contains
// amount objects and i want to calculate to sum of amount objects
Total Invoice Price:
{data.goods
? data.goods.map((item) => (
<div key={item.id}>
<div>{parseInt(item.amount).reduce((a, b) => a + b, 0)}</div>
</div >
))
: null}
But im getting error TypeError: parseInt(...).reduce is not a function , How to fix this ?
·
Juan Pablo Isaza
2 Respostas
Responde à pergunta0
reduce is an array method. So: instead of mapping over the data, call a function within your JSX that returns the sum of the amount values of each object in the array.
Note: if your amount values are strings coerce them to numbers first (Number(good.amount)).
function Example({ data }) {
function getTotal(data) {
return data.goods.reduce((acc, good) => {
return acc + Number(good.amount);
}, 0);
}
return (
<div>
<h4>Total</h4>
<p>{getTotal(data)}</p>
</div>
);
}
const data = { goods: [{ amount: '1' }, { amount: '5' }, { amount: '13' }] };
ReactDOM.render(
<Example data={data} />,
document.getElementById('react')
);<script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.js"></script>
<div id="react"></div>
·
Juan Pablo Isaza
Relatório
0
goods = [{
amount: "11"
},
{
amount: "11"
},
{
amount: "11"
},
]
let sum = goods.reduce((a, b) => a + parseInt(b.amount), 0)
console.log(sum)
·
Juan Pablo Isaza
Relatório
Responde à pergunta