const object = {
key1: 'example_key1',
key2: {
key3: 'example_key2'
}
}
const string = 'key1'
const array = ['key2', 'key3']
object[string] = 'foo' // Work
object[array] = 'bar' // Dont work
How can I access and change the object with the array of keys?
I have tried loadash.get but it can only get values not change them.
You need to do something like the following:
function set(obj, path, value) {
var schema = obj
var len = path.length
for(var i = 0; i < len - 1; i++) {
var elem = path[i]
if (!schema[elem] ) schema[elem] = {}
schema = schema[elem]
}
schema[path[len-1]] = value
}
And then you could use it in the following way:
set(object, array, 'someText')
With a function like the above set you can update an object passing an array of nested keys and the new value.
You could do something like:
const object = {
key1: 'example_key1',
key2: {
key3: 'example_key2'
}
}
const string = 'key1'
const array = ['key2', 'key3']
console.log(object[array[0]][array[1]])EDIT
First solution is static. Below solution is more dynamic:
const object = {
key1: 'example_key1',
key2: {
key3: 'example_key2'
}
}
const object2 = {
key1: 'example_key1',
key2: {
key3: {
key4: "example_key3"
}
}
}
const string = 'key1'
const array = ['key2', 'key3']
let nestedObj = undefined;
array.forEach(val => {
if (nestedObj) nestedObj = nestedObj[val];
else nestedObj = object[val];
})
console.log(nestedObj)
const array2 = ['key2', 'key3', 'key4']
let nestedObj2 = undefined;
array2.forEach(val => {
if (nestedObj2) nestedObj2 = nestedObj2[val];
else nestedObj2 = object2[val];
})
console.log(nestedObj2)
array[2].
You can create a recursive function and and check if the key from the object exist in the array, if so then change the key value in the object
const object = {
key1: 'example_key1',
key2: {
key3: 'example_key2'
},
key3: 'someVal'
}
const array = ['key2', 'key3']
function doRecursion(obj) {
for (let keys in obj) {
if (array.includes(keys)) {
console.log(typeof obj[keys])
if (typeof obj[keys] === 'object') {
doRecursion(obj[keys])
} else {
obj[keys] = 'bar';
}
} else {
console.log(keys)
}
}
return obj
};
console.log(doRecursion(object));I think here recurtion will make things easier
function get(obj, keys) {
if(typeof keys === 'string') {
return obj[keys];
}
const key = keys.shift();
return keys.length ? get(obj[key], keys) : obj[key];
}
const object1 = {
key1: 'example_key1',
key2: {
key3: 'example_key2'
}
}
const object2 = {
key1: 'example_key1',
key2: {
key3: {
key4: "example_key3"
}
}
}
const string = 'key1'
const array1 = ['key2', 'key3'];
const array2 = ['key2', 'key3', 'key4'];
console.log(get(object1, string));
console.log(get(object1, array1));
console.log(get(object2, array2));
object[array]to return?