Okay, so I have a search results array of objects where one of the object properties value (show value) matches a search. The structure of this array is as follows and may contain any number of different objects:
results = [
{
day: value,
time: value,
show: value,
sid: value,
network: value,
title: value,
ep: value,
link: value,
}
];
I am trying to consolidate all the results into one large object, merging any days or times that have the same value. However, I cannot simply look at each day or time value independently. For example, I need to retain 9:00 pm on Monday if there is a 9:00 pm on Tuesday as well.
To do this I am trying to create a new object structure like so:
for ( var i=0; i<results.length; i++ ) {
var uniqtime = results[i]["time"];
var uniqshow = results[i].show;
uniqresults[results[i].day] = {
uniqtime: {
uniqshow: {
sid: results[i].sid,
network: results[i].network,
title: results[i]["title"],
ep: results[i].ep,
link: results[i]["link"]
}
}
};
}
but obviously this won't work since the variable sub-object key names are treated as strings.
If I instead try to create the variable sub-objects/keys like so:
for ( var i=0; i<obj.length; i++ ) {
uniqresults[results[i].day] = {};
uniqresults[results[i].day][results[i]["time"]] = {};
uniqresults[results[i].day][results[i]["time"]][results[i].show] = {
sid: obj[i].sid,
network: results[i].network,
title: results[i]["title"],
ep: results[i].ep,
link: results[i]["link"]
};
}
I can indeed create the proper key names but I am forced to declare an empty object to define each key ( uniqresults[obj[i].day] = {}
& uniqresults[obj[i].day][obj[i]["time"]] = {}
). If I don't declare like this it won't let me insert the other sub-keys/values that I need to. However, declaring like this doesn't allow me to merge my results arrays correctly since I am essentially emptying out the sub-key names each time I read a new result object!
Maybe I am making this more complicated than it should be. Maybe there is an easier way or a way underscore or jquery could simplify my task at hand. Regardless, I am quite desperate for a proper solution at the moment.
I don't know whether there's a neater solution to the wider problem, but the issue of overwriting the sub-objects each time can be solved by checking if they already exist before creating them.
A relatively compact and idiomatic way of doing this in JS is using the ||
operator, which unlike most languages returns the argument which evaluated to true, not simply a boolean true
:
uniqresults[results[i].day] = uniqresults[results[i].day] || {};
The first time through, uniqresults[results[i].day]
will be undefined, so evaluate to false, so {}
will be assigned; subsequently, however, it will be an object, which evaluates to true, so will simply assign the variable to itself, leaving it unchanged.
It seems like you could use a conditional check when redifining those objects.
var day, time;
for ( var i=0; i<obj.length; i++ ) {
// Instantiate the day reference if it doesn't exist
day = uniqresults[results[i].day] = uniqresults[results[i].day] || {};
// Instantiate the time reference if it doesn't exist
time = day[results[i].time] = day[results[i].time] || {};
time[results[i].show] = {
sid: obj[i].sid,
network: results[i].network,
title: results[i]["title"],
ep: results[i].ep,
link: results[i]["link"]
};
}
Cheers!
Create an empty object only if the object's key does not exist:
if(!(results[i].day in uniqresults)){
uniqresults[results[i].day] = {};
}
And for sub keys so on.
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