TypeScript按日期排序不起作用 [英] TypeScript sort by date not working

问题描述

我有一个对象TaskItemVO，其字段为dueDate，类型为Date:

I have an object TaskItemVO with field dueDate which has the type Date:

export class TaskItemVO {
    
    public dueDate: Date;
}

我有这种方法，当我尝试按日期排序但不起作用时:

I have this method which I call when I try to sort by date but it is not working:

public sortByDueDate(): void {
    this.myArray.sort((a: TaskItemVO, b: TaskItemVO) => {
        return a.dueDate - b.dueDate;

    });
}

我在方法的返回行中收到此错误:

I get this error in the return line of method:

算术运算的右侧必须为'any'，'number'或枚举类型.

The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.

算术运算的左侧必须为'any'，'number'或枚举类型.

The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.

那么在TypeScript中按日期字段对数组进行排序的正确方法是什么?

推荐答案

尝试使用 ^上面的错误引发了带有未定义日期的错误，请尝试以下操作:

^ Above throws error with undefined date so try below:

如果要处理未定义的内容:

If you want to handle undefined:

private getTime(date?: Date) {
    return date != null ? date.getTime() : 0;
}


public sortByDueDate(): void {
    this.myArray.sort((a: TaskItemVO, b: TaskItemVO) => {
        return this.getTime(a.dueDate) - this.getTime(b.dueDate);
    });
}

这篇关于TypeScript按日期排序不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！