javascript - 每次我调用函数时防止声明空数组

Question

const someFunction = (dyanamic data) => {
    let dataArray = [];
    let dataObject = {
        name: `${dynamic data}`
    };
    dataArray.push(dataObject);
}

someFunction(dyanamic data); 

现在想象一下，每次按下按钮都会调用 someFunction 让我们说在本机反应中，那么每次我如何防止这种情况，dataArray 都会变空。

标签： javascriptreact-native

Answer 1

你的数组应该是全局的。

const someFunction = (dyanamic_data, dataArray) => {
    let dataObject = {
        name: `${dynamic data}`
    };
    dataArray.push(dataObject);
}
// declare your array
const dataArray = [];
// call your function
someFunction(dyanamic_data_1, dataArray); 
someFunction(dyanamic_data_2, dataArray);