I know Some people might find this very easy. But It seems to be very difficult to start. If i have array i could have easily done with filter.
Lets say i have this object
const mapData = {family: ["gender", "ethnics"], house: ["wardNumber","livingType"]}
Now if I have atribute = "gender" How can i find the key family.
if I have atribute = "livingType" Then i need House;
Any Javascript pro here?
Thanks in advance
You could get the keys and find with includes.
Methods:
Object.keys for getting own keys from an object,
Array#find for finding an item with a callback,
Array#includes, this checks if an item exists in an array.
const
mapData = { family: ["gender", "ethnics"], house: ["wardNumber", "livingType"] },
attribute = "gender",
key = Object
.keys(mapData)
.find(k => mapData[k].includes(attribute));
console.log(key); You can use Object.keys() and filter()
const mapData = {family: ["gender", "ethnics"], house: ["wardNumber","livingType"]}
const findKey = (obj,attr) => Object.keys(obj).filter(k => obj[k].includes(attr))[0]
console.log(findKey(mapData,"gender"))
console.log(findKey(mapData,"livingType"))You can do it with Object.entries(), Array.find(), Array.includes() and Array.shift().
If the value is not found, this will return undefined.
const data = {family: ["gender", "ethnics"], house: ["wardNumber","livingType"]}
const getKey = val =>
(Object.entries(data).find(([k, v]) => v.includes(val)) || []).shift();
console.log(getKey('gender'));
console.log(getKey('livingType'));
console.log(getKey('non-existing-value'));