javascript - 正确警告：“预计在箭头函数 array-callback-return 中返回一个值”

Question

我想更正警告

预期在箭头函数 array-callback-return 中返回一个值。

我尝试添加return，但问题仍然存在。

listTaskWorkflow.forEach(element => {
    workflowDetail.department.departmentsList.find(department => {
        if (department.idDept === element.idDept) 
            element.idDept = department.departmentName;          
    })
});

标签： javascriptforeachfind

Answer 1

find期望你告诉它它给你回电话的项目是否是你正在寻找的项目。要在该代码中使用它，您需要保留idDept检查，find然后使用它返回的数组元素：

listTaskWorkflow.forEach(element => {
    const department = workflowDetail.department.departmentsList.find(department => department.idDept === element.idDept);
    if (department) {
        element.idDept = department.departmentName;          
    }
});

但是，另一种选择是使用for-of循环：

listTaskWorkflow.forEach(element => {
    for (const department of workflowDetail.department.departmentsList) {
        if (department.idDept === element.idDept) {
            element.idDept = department.departmentName;          
            break;
        }
    }
});

如果您愿意，也可以使用for-of代替forEach：

for (const element of listTaskWorkflow) {
    for (const department of workflowDetail.department.departmentsList) {
        if (department.idDept === element.idDept) {
            element.idDept = department.departmentName;          
            break;
        }
    }
}