I'm having an issue with trying to populate a multidimensional object in javascript before all of the dimensions are defined.
For example this is what I want to do:
var multiVar = {};
var levelone = 'one';
var leveltwo = 'two';
multiVar[levelone][leveltwo]['levelthree'] = 'test'
It would be extremely cumbersome to have to create each dimension with a line like this:
var multiVar = {};
multiVar['levelone'] = {};
multiVar['levelone']['leveltwo'] = {};
multiVar['levelone']['leveltwo']['levelthree'] = 'test'
The reason why I need to do it without iterative priming is because I don't know how many dimensions there will be nor what the keys it will have. It needs to be dynamic.
Is there a way to do that in a dynamic way?
You could write a function which ensures the existence of the necessary "dimensions", but you won't be able to use dot or bracket notation to get this safety. Something like this:
function setPropertySafe(obj)
{
function isObject(o)
{
if (o === null) return false;
var type = typeof o;
return type === 'object' || type === 'function';
}
if (!isObject(obj)) return;
var prop;
for (var i=1; i < arguments.length-1; i++)
{
prop = arguments[i];
if (!isObject(obj[prop])) obj[prop] = {};
if (i < arguments.length-2) obj = obj[prop];
}
obj[prop] = arguments[i];
}
Example usage:
var multiVar = {};
setPropertySafe(multiVar, 'levelone', 'leveltwo', 'levelthree', 'test');
/*
multiVar = {
levelone: {
leveltwo: {
levelthree: "test"
}
}
}
*/
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