I have a JSON object that is returned in different ways, but always has key
. How can I get it?
Eg
"Records": {
"key": "112"
}
Or
"Records": {
"test": {
"key": "512"
}
}
Or even in array:
"Records": {
"test": {
"test2": [
{
"key": "334"
}
]
}
}
Tried several options, but still can't figure out (
I will not write the code for you but give you an idea may be it will help, First convert JSON object in to string using
JSON.stringify(obj);
after that search for Key using indexOf() method. Extract previous '{' and Next '}' string and again cast in to JSON object. using
var obj = JSON.parse(string);
Then
var value = obj.key
I think this migth be solution (asuming key is always string and you don't care about res of data)
const data = [`"Records": { "test": { "test2": [ { "key": "334", "key": "3343" } ] } }`, `"Records": { "test": { "key": "512" } }`, `"Records": { "key": "112" }`] const getKeys = data => { const keys = [] const regex = /"key"\\s*:\\s*"(.*)"/g let temp while(temp = regex.exec(data)){ keys.push(temp[1]) } return keys } for(let json of data){ console.log(getKeys(json)) }
How can i get it?
Recursively! eg
function getKey(rec) {
if (rec.key) return rec.key;
return getKey(rec[Object.keys(rec)[0]]);
}
You could use an iterative and recursive approach for getting the object with key
in it.
function getKeyReference(object) { function f(o) { if (!o || typeof o !== 'object') { return; } if ('key' in o) { reference = o; return true; } Object.keys(o).some(function (k) { return f(o[k]); }); } var reference; f(object); return reference; } var o1 = { Records: { key: "112" } }, o2 = { Records: { test: { key: "512" } } }, o3 = { Records: { test: { test2: [{ key: "334" }] } } }; console.log(getKeyReference(o1)); console.log(getKeyReference(o2)); console.log(getKeyReference(o3));
You can try this
const data = { "Records": { "key": "112" } }; const data2 = { "Records": { "test": { "key": "512" } } }; const data3 = { "Records": { "test": { "test2": [ { "key": "334" }, ] } } }; function searchKey(obj, key = 'key') { return Object.keys(obj).reduce((finalObj, objKey) => { if (objKey !== key) { return searchKey(obj[objKey]); } else { return finalObj = obj[objKey]; } }, []) } const result = searchKey(data); const result2 = searchKey(data2); const result3 = searchKey(data3); console.log(result); console.log(result2); console.log(result3);
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