[英]typescript fix error argument of type is not assignable
I don't know why I'm facing a problem.我不知道为什么我遇到了问题。 I have a function that takes an array of objects.
我有一个接受对象数组的函数。 Every object has a property named
id
and I wanted to get the last id
from the given data.每个对象都有一个名为
id
的属性,我想从给定的数据中获取最后一个id
。 The code is working fine.代码工作正常。
type Data = object;
const data = [
{
'id': 1,
'name': 'Uncategorized',
},
{
'id': 2,
'name': 'DSLR Cameras',
},
{
'id': 3,
'name': 'Printer / Ink',
},
];
const getLastId = (data: Data[]): number => {
if (Array.isArray(data) && data.length > 0) {
// Create an array of Id's of all items
const idsArray: number[] = [];
data.forEach((obj: { id: number }) => idsArray.push(obj.id));
// Return last element id
return idsArray[data.length - 1];
} else {
return 1;
}
};
But, at the following line, an error is coming.但是,在以下行中,将出现错误。
data.forEach((obj: { id: number }) => idsArray.push(obj.id));
data.forEach((obj: { id: number }) => idsArray.push(obj.id));
TS2345: Argument of type '(obj: { id: number; }) => number' is not assignable to parameter of type '(value: object, index: number, array: object[]) => void'.
Types of parameters 'obj' and 'value' are incompatible.
Property 'id' is missing in type '{}' but required in type '{ id: number; }'.
What type of error it is and How to fix this?这是什么类型的错误以及如何解决这个问题? Link
关联
Your Data (I do not like this name) declaration is Object, but should be like this:你的数据(我不喜欢这个名字)声明是对象,但应该是这样的:
type Data = {
id: number,
name: string,
};
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