Is there a better way other than looping to find data in JSON? It's for edit and delete.
for(var k in objJsonResp) {
if (objJsonResp[k].txtId == id) {
if (action == 'delete') {
objJsonResp.splice(k,1);
} else {
objJsonResp[k] = newVal;
}
break;
}
}
The data is arranged as list of maps. Like:
[
{id:value, pId:value, cId:value,...},
{id:value, pId:value, cId:value,...},
...
]
7 Answers
(You're not searching through "JSON", you're searching through an array -- the JSON string has already been deserialized into an object graph, in this case an array.)
Some options:
Use an Object Instead of an Array
If you're in control of the generation of this thing, does it have to be an array? Because if not, there's a much simpler way.
Say this is your original data:
[
{"id": "one", "pId": "foo1", "cId": "bar1"},
{"id": "two", "pId": "foo2", "cId": "bar2"},
{"id": "three", "pId": "foo3", "cId": "bar3"}
]
Could you do the following instead?
{
"one": {"pId": "foo1", "cId": "bar1"},
"two": {"pId": "foo2", "cId": "bar2"},
"three": {"pId": "foo3", "cId": "bar3"}
}
Then finding the relevant entry by ID is trivial:
id = "one"; // Or whatever
var entry = objJsonResp[id];
...as is updating it:
objJsonResp[id] = /* New value */;
...and removing it:
delete objJsonResp[id];
This takes advantage of the fact that in JavaScript, you can index into an object using a property name as a string -- and that string can be a literal, or it can come from a variable as with id above.
