How do I display values with the same index number

Question

var myobj = {
"date": ["somedata1","somedata2","somedata3"],
"event": ["somedata1","somedata2","somedata3"],
"venue": ["somedata1","somedata2","somedata3"]
}

My intention is that the user enters the date and gets the event and venue with the same index as output.

Answer 1

Aleksandar Stevanovic

He would need to loop every object to find the right date.
for(var a = 0; a < myobj.length; a++) {
if(myobj[a]["date"] == input) {
var event = myobj[a]["event"];
var venue = myobj[a]["venue "];
//do something
return;
}
}

Answer 2

Something like this?

var input = prompt("date:");
var dateIndex = myobj["date"].indexOf(input);
var event = myobj["event"][dateIndex];
var venue = myobj["venue"][dateIndex];

Answer 3

for ... myobj.date.length

If you use 'today', you'll get three alerts because you don't break once found.

Answer 4

I regularly use:

for(var i in myobj.date) { ... }

which is easier to visually parse in my opinion; it behaves similarly here, setting i to the index.

Answer 5

Toni is right, if you have a LOT of data keep in mind that a loop will take its time, in lodash you can simplify it like _.find(myobj, blah blah ) but again it will have a loop within lodash... Anyway good luck

Answer 6

finally solved. only one error in Toni's code. it is myobj.date.length. Final code looks like this

var myobj = {
"date": ["today","morro","yday"],
"event": ["dance","sing","run"],
"venue": ["here","there","somewhere"]
}

input = prompt ("enter date");

for(var a = 0; a < myobj.date.length; a++) {
  if(myobj.date[a] ==input) {
       var event = myobj.event[a];
       var venue = myobj.venue[a];
       alert (event +" " +venue );}
}

Answer 7

thanks for the response. i wish it is this simple.

I am prompting user to input date
I want to be able to get the index of the date entered
then display myobj[event][i] and myobj [venue][i], where i is the index of the date.

Answer 8

Why don't you make it like array of objects? Like myobj = [{date: 'somedata1' , event: 'somedata1', venue: 'somedata1}, {date:' somedata2', etc etc]

Your data will be in one object...

Also you can try lodash... It will be easier to manipulate data

Answer 9

I do appreciate the assistance. I will try to rearrange the data even though it will be very difficult. I have a very large data to work with.

Answer 10

I tried this but got no response. not sure what the error is

var myobj = {
"date": ["today","morro","yday"],
"event": ["dance","sing","run"],
"venue": ["here","there","somewhere"]
}

input = prompt ("enter date");

for(var a = 0; a < myobj.length; a++) {
  if(myobj.date[a] ==input) {
       var event = myobj.event[a];
       var venue = myobj.venue[a];
       alert (event, venue);}
else {alert ("try again");}

}