I'm trying to remove entries from an object so that it only includes those that are in an array. So I have a required array:
const required = ['accountNumber', 'packRequested', 'collectionDate']
And a touchedFields object:
const touchedFields = {
accountNumber: true,
sortCode: false,
account: true,
collectionDate: false,
packRequested: false
}
This is what I am after:
const touchedFields = {
accountNumber: true,
collectionDate: false,
packRequested: false
}
How can this be achieved?
I've tried instead creating an array output (as I couldn't do the object), looping through each object entry, and the looping through each array key, comparing values and pushing to a new array if the values matches:
let newArr = []
for (let [key, value] of Object.entries(requiredFields)) {
Object.keys(touchedFields).forEach((cur) => {
if (cur == value) {
newArr.push({cur: value})
}
})
}
console.log(newArr)
But even that doesn't set the values properly as it set's the key as cur and not the actual cur variable:
[{cur: 'accountNumber'}, {cur: 'packRequested'}, {cur: 'collectionDate'}]
Any help would be greatly appreciated.
const required = ['accountNumber', 'packRequested', 'collectionDate']
const touchedFields = {
accountNumber: true,
sortCode: false,
account: true,
collectionDate: false,
packRequested: false
}
let result = Object.fromEntries(
Object.entries(touchedFields)
.filter(([k,v]) => required.includes(k))
)
console.log(result)
Use Array.reduce method
const required = ['accountNumber', 'packRequested', 'collectionDate']
const touchedFields = {
accountNumber: true,
sortCode: false,
account: true,
collectionDate: false,
packRequested: false
}
const result = required.reduce((acc, key) => {
acc[key] = touchedFields[key];
return acc;
}, {});
console.log(result);If you want to alter the orginal object, you can loop over the keys and delete the ones that are not in the required array.
const required = ['accountNumber', 'packRequested', 'collectionDate']
const touchedFields = {
accountNumber: true,
sortCode: false,
account: true,
collectionDate: false,
packRequested: false
}
const pruneObject = (obj, keys) => Object.keys(obj).forEach(
key => !required.includes(key) && delete obj[key]
);
pruneObject(touchedFields, required);
console.log(touchedFields);If you do not want to alter the original object you can loop over the array and build a new object from it.
const required = ['accountNumber', 'packRequested', 'collectionDate']
const touchedFields = {
accountNumber: true,
sortCode: false,
account: true,
collectionDate: false,
packRequested: false
}
const inclusivePick = (obj, keys) => Object.fromEntries(
keys.map(key => [key, obj[key]])
);
const result = inclusivePick(touchedFields, required);
console.log(result);