如何测试Javascript数组中是否存在对象？(How do I test if an object exists in a Javascript array?)

 我已经看到了其他问题，我已经尝试了过滤功能，但我不确定我是否正确使用它。 
 
 基本上我有一个对象数组，如下所示： 
 
[{"hour":"6 am", "date":"2012-12-01"},{"hour":"7 am", "date":"2012-12-01"}]
 
 我循环了一段时间，每天我都会在早上6点到晚上9点之间循环。 如果上述数组中存在小时（如该特定日期的小时）。 我想将它标记为可用于新对象，然后传递给新数组。 以下是我目前使用的代码。 
 
for(var i = 0; i < dayCount; i++){//Loop through the days that exist in the schedule
    day = new Object();
    day.date = Date.parse(startDate).add(i).days();
    day.dayName = weekday[day.date.getDay()]
    day.hours = new Array();
    for(var j = 6; j < 22; j++){ //Loop through hours of the day seeing if they're available/scheduled, etc.
        if(j<=12){
            thisHour = j +' am';
        } else{
            thisHour = j-12 + ' pm';        
        }
        var thisIsAvailable = $(assignedHours).filter(function(){
                return assignedHours.hour == thisHour && assignedHours.date == day.date.toString("yyyy-MM-dd");
            });
        var thisIsScheduled = 0;
        day.hours.push({hour: thisHour,available: thisIsAvailable, scheduled: thisIsScheduled});
    }
daysInSchedule.push(day);
}   
 
 几个笔记。 我在day.date属性上使用.toString（），因为它是以JS Date格式格式化的，我正在比较它的值是MYSQL Date格式。 我已经提醒（谈论旧学校调试）thisIsAvailable.length，我每次都得到0。 任何想法都表示赞赏。 谢谢！ 
 
 编辑：刚刚意识到我忘了告诉你一切非常重要的事情。 我给你的数组包含在变量Named assignedHours中。 很抱歉离开了。 
 
 编辑2：为了澄清，我的问题是在两个代码摘录之间的位置。 我试图看看给定数组中的一个对象是否匹配循环中的日期和小时，以及我正在运行的嵌套循环。 如果确实如此，我想将其传递给一个新对象，然后我将其推入当天的小时数组中。 如果没有，那么我仍然传递对象但是为0可用。 

I've seen other questions, and I've tried the filter function, but I'm not sure if I'm using it correctly.
 
Essentially I have an array of objects that looks like this:
 
[{"hour":"6 am", "date":"2012-12-01"},{"hour":"7 am", "date":"2012-12-01"}]
 
I'm looping through a set period of days, and on each day I'm looping through the hours between 6am and 9pm. If the hour(as in the hour on that specific date) exists in the above array. I want to mark it as available in a new object that I then pass to a new array. Below is the code I'm currently using.
 
for(var i = 0; i < dayCount; i++){//Loop through the days that exist in the schedule
    day = new Object();
    day.date = Date.parse(startDate).add(i).days();
    day.dayName = weekday[day.date.getDay()]
    day.hours = new Array();
    for(var j = 6; j < 22; j++){ //Loop through hours of the day seeing if they're available/scheduled, etc.
        if(j<=12){
            thisHour = j +' am';
        } else{
            thisHour = j-12 + ' pm';        
        }
        var thisIsAvailable = $(assignedHours).filter(function(){
                return assignedHours.hour == thisHour && assignedHours.date == day.date.toString("yyyy-MM-dd");
            });
        var thisIsScheduled = 0;
        day.hours.push({hour: thisHour,available: thisIsAvailable, scheduled: thisIsScheduled});
    }
daysInSchedule.push(day);
}   
 
A couple notes. I use .toString() on the day.date property because it is formatted in JS Date format and the value I'm comparing it against is in the MYSQL Date format. I've alerted (talk about old school debugging) thisIsAvailable.length, and I get 0 everytime. Any ideas are appreciated. Thanks!
 
EDIT: Just realized I forgot to tell you all something very important. The array I give you is contained in the variable Named assignedHours. Sorry about leaving that out.
 
EDIT 2: To clarify, my question is in the bit between the two code excerpts. I'm trying to see if one of the objects in the given array matches the day and hour in the loop, and nested loop I'm running through. If it does I want to pass that on to a new object which I then push into the hours array of the day. If not then I still pass the object but with a 0 value for it being available.

原文：https://stackoverflow.com/questions/13179038