how to create object tree from string in java script

Question

Hi In javascript I have to create object tree from a string as below

"group1:node1:properties,group1:node2:properties,group2:node2:properties,group2:node3:properties,group2:node1:properties,group3:node2:properties".

In this, properties are also : seperated,

I require object tree as below

group1
 node1
 properties
 node2
 properties
group2
 node2
 properties
 node3
 properties
 node1
 properties
group3
 node2
 properties

can any body tell me what is the best way to do that with example.

• jAndy: I hope your teacher won't see this :-P
• CloudyMarble: Do you need real objects or only an output?
• agarwal_achhnera: I need to create object from which I can access on basis of group

Answer 1

Although it seems like a school exercise...I think you need to take a look at the split() method. First split on the comma (,), then the colon (:). For example..

Look at this: http://jsfiddle.net/T852c/

var str = 'group1:node1:properties,group1:node2:properties,group2:node2:properties,group2:node3:properties,group2:node1:properties,group3:node2:properties';
var result ={},
 groups = str.split(','),
 groupsCount = groups.length; 
for(var i=groupsCount; i--;){
 var groupStr = groups[i],
 split = groupStr.split(':'),
 groupKey = split[0],
 nodeKey = split[1],
 properties = split[2],
 group = result[groupKey] || (result[groupKey] = {}),
 node = group[nodeKey] || (group[nodeKey] = {});
 
 node[properties] = { foo: 'bar' }; 
}
console.log(result);

It might not be exactly what you are looking for but it might help to get you started. Good luck!

• DannyThunder: And when you splitted them, append to the array.