Remove element from JSON array recursively
Question
I have the following json array:
{
"id": "1004482725",
"parent": 0,
"industry": "Akrotiri",
"industry_id": "root",
"name": "Comp",
"percentage": "0",
"report": "null",
"description": "",
"subsidiary": "3",
"children": [{
"id": "1004482733",
"parent": "1004482725",
"industry": "Akrotiri",
"industry_id": "industry9",
"name": "Comp11",
"percentage": "30",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482734",
"parent": "1004482733",
"industry": "Akrotiri",
"industry_id": "industry10",
"name": "Comp110",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02634",
"parent": "1004482734",
"industry": "",
"industry_id": "0",
"name": "Sef 4",
"percentage": "4",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}, {
"id": "1004482735",
"parent": "1004482733",
"industry": "Akrotiri",
"industry_id": "industry11",
"name": "Comp111",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02635",
"parent": "1004482735",
"industry": "",
"industry_id": "0",
"name": "Sef 5",
"percentage": "5",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}, {
"id": "1004482736",
"parent": "1004482733",
"industry": "Akrotiri",
"industry_id": "industry12",
"name": "Comp112",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482737",
"parent": "1004482736",
"industry": "Akrotiri",
"industry_id": "industry13",
"name": "Comp1120",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "2",
"children": [{
"id": "1004482738",
"parent": "1004482737",
"industry": "Akrotiri",
"industry_id": "industry14",
"name": "Comp11200",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482739",
"parent": "1004482738",
"industry": "Akrotiri",
"industry_id": "industry15",
"name": "Comp112000",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02636",
"parent": "1004482739",
"industry": "",
"industry_id": "0",
"name": "Sef 6",
"percentage": "6",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}]
}, {
"id": "1004482740",
"parent": "1004482736",
"industry": "Akrotiri",
"industry_id": "industry16",
"name": "Comp1121",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482741",
"parent": "1004482740",
"industry": "Akrotiri",
"industry_id": "industry17",
"name": "Comp11210",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02637",
"parent": "1004482741",
"industry": "",
"industry_id": "0",
"name": "Sef 7",
"percentage": "7",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}, {
"id": "1004482742",
"parent": "1004482736",
"industry": "Akrotiri",
"industry_id": "industry18",
"name": "Comp1122",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "2",
"children": [{
"id": "1004482743",
"parent": "1004482742",
"industry": "Akrotiri",
"industry_id": "industry19",
"name": "Comp11220",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02638",
"parent": "1004482743",
"industry": "",
"industry_id": "0",
"name": "Sef 8",
"percentage": "8",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}]
}]
}, {
"id": "1004482726",
"parent": "1004482725",
"industry": "Akrotiri",
"industry_id": "industry2",
"name": "Comp10",
"percentage": "30",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482732",
"parent": "1004482726",
"industry": "Akrotiri",
"industry_id": "industry8",
"name": "Comp102",
"percentage": "30",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02633",
"parent": "1004482732",
"industry": "",
"industry_id": "0",
"name": "Sef 3",
"percentage": "3",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}, {
"id": "1004482728",
"parent": "1004482726",
"industry": "Akrotiri",
"industry_id": "industry4",
"name": "Comp101",
"percentage": "30",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482729",
"parent": "1004482728",
"industry": "Akrotiri",
"industry_id": "industry5",
"name": "Comp1010",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482730",
"parent": "1004482729",
"industry": "Akrotiri",
"industry_id": "industry6",
"name": "Comp10100",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482731",
"parent": "1004482730",
"industry": "Akrotiri",
"industry_id": "industry7",
"name": "Comp101000",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02632",
"parent": "1004482731",
"industry": "",
"industry_id": "0",
"name": "Sef 2",
"percentage": "2",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}]
}]
}, {
"id": "1004482727",
"parent": "1004482726",
"industry": "Akrotiri",
"industry_id": "industry3",
"name": "Comp100",
"percentage": "30",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02631",
"parent": "1004482727",
"industry": "",
"industry_id": "0",
"name": "Sef1",
"percentage": "1",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}, {
"id": "1004482744",
"parent": "1004482725",
"industry": "Akrotiri",
"industry_id": "industry20",
"name": "Comp12",
"percentage": "30",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482745",
"parent": "1004482744",
"industry": "Akrotiri",
"industry_id": "industry21",
"name": "Comp120",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "",
"parent": "",
"industry": "",
"industry_id": "",
"name": "",
"percentage": "",
"report": "",
"description": "",
"subsidiary": "",
"children": ""
}, {
"id": "1004482748",
"parent": "1004482745",
"industry": "Akrotiri",
"industry_id": "industry24",
"name": "Comp1210",
"percentage": "50.00",
"report": "null",
"description": "",
"subsidiary": "2",
"children": [{
"id": "1004482749",
"parent": "1004482748",
"industry": "Akrotiri",
"industry_id": "industry25",
"name": "Comp12100",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "1004482750",
"parent": "1004482749",
"industry": "Akrotiri",
"industry_id": "industry26",
"name": "Comp121000",
"percentage": "100.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02639",
"parent": "1004482750",
"industry": "",
"industry_id": "0",
"name": "Sef 9",
"percentage": "9",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}]
}, {
"id": "",
"parent": "",
"industry": "",
"industry_id": "",
"name": "",
"percentage": "",
"report": "",
"description": "",
"subsidiary": "",
"children": ""
}]
}, {
"id": "1004482746",
"parent": "1004482744",
"industry": "Akrotiri",
"industry_id": "industry22",
"name": "Comp121",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "",
"parent": "",
"industry": "",
"industry_id": "",
"name": "",
"percentage": "",
"report": "",
"description": "",
"subsidiary": "",
"children": ""
}]
}, {
"id": "1004482747",
"parent": "1004482744",
"industry": "Akrotiri",
"industry_id": "industry23",
"name": "Comp122",
"percentage": "30.00",
"report": "null",
"description": "",
"subsidiary": "1",
"children": [{
"id": "aa02640",
"parent": "1004482747",
"industry": "",
"industry_id": "0",
"name": "Sef 10",
"percentage": "10",
"report": "null",
"description": "",
"subsidiary": "0",
"children": []
}]
}]
}]
}
In this example i have some elements that looks like this:
"children": [{
"id": "",
"parent": "",
"industry": "",
"industry_id": "",
"name": "",
"percentage": "",
"report": "",
"description": "",
"subsidiary": "",
"children": ""
}
What i would like to achive is to eliminate this "childrens" from the original array. So far i've tried this function but it doesn't work the way i want:
function deleteEmpty(data){
if (data.children.length)
{
nr = data.children.length;
for (i=0;i<nr;i++)
{
// console.log(data.children[i]);
if (data.children[i]["id"] == ""){
console.log(data.children[i]);
delete data.children[i];
}
this.deleteEmpty(data.children[i]);
}
}
return data;
}
Also i have creatd a jsfiddle here : http://jsfiddle.net/fP7NS/2/ Please help me out or give me some hints with what i am doing wrong.
1 answers
solution1
1 ACCPTED 2013-03-17 09:47:18
First (if necessary) turn your JSON string into an object. Your children property is sometimes an array, sometimes an empty array, and sometimes an empty string. This makes the logic a bit awkward. i suggest you write a function that tests whether a particular child is empty. Then you can write your main loop like this:
function isEmpty(node) {
// logic for testing that a node is empty
}
function deleteEmptyChildren(node) {
// assumes node is not empty
if (Array.isArray(node.children)) {
node.children = node.children.filter(
function(child) {
if (isEmpty(child)) {
return false;
} else {
deleteEmptyChildren(child);
return true;
}
}
);
}
}
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