I have JSON response coming from Node.JS API where Label values are same but other values like dd1, dd2 are different I am trying to merge same label values in one object, How could I achieve this?
{
"label": "Medium",
"dd1": "Cat A",
"dd2": "Non Cision",
},
{
"label": "Medium",
"dd1": "Cat B",
"dd2": null,
},
{
"label": "Tone",
"dd1": "Neutral",
"dd2": null,
}
Above JSON Objects we can see Label are same in first two so, it should be merge and null values eleminated. like this
{
"label": "Medium",
"dd1": "Cat A", "Cat B"
"dd2": "Non Cision",
},
{
"label": "Tone",
"dd1": "Neutral",
"dd2": null,
}
TS Code -
var output = [];
value.forEach(function(item) {
var existing = output.filter(function(v, i) {
return v.label == item.label;
});
if (!existing.length) {
if (typeof item.label == "string") output.push(item);
}
});
console.log(output);
I don't know much about Typescript - this is just a Javascript answer but I'm hoping it might be helpful.
const data = [
{ "label": "Medium", "dd1": "Cat A", "dd2": "Non Cision" },
{ "label": "Medium", "dd1": "Cat B", "dd2": null },
{ "label": "Medium", "dd1": "Cat C", "dd2": null },
{ "label": "Tone", "dd1": "Neutral", "dd2": null },
];
const merge_value = (key, current_value, new_value) =>
(key === 'label' || !current_value) ? new_value :
!new_value ? current_value :
[].concat(current_value, new_value);
const merge_objects = (object1, object2) =>
Object.entries(object2).reduce(
(acc, [key, value]) => Object.assign(acc, { [key]: merge_value(key, object1[key], value) }),
{}
);
const mapped = data.reduce(
(acc, item) => acc.set(item.label, merge_objects(acc.get(item.label) ?? {}, item)),
new Map()
);
const res = [...mapped.values()];
console.log(res);Can you check this?
const cars = [
{
"label": "Medium",
"dd1": "Cat A",
"dd2": "Non Cision",
},
{
"label": "Medium",
"dd1": "Cat B",
"dd2": null,
},
{
"label": "Tone",
"dd1": "Neutral",
"dd2": null,
}
];
function groupBy(objectArray, property) {
return objectArray.reduce(function (acc, obj) {
let key = obj[property]
if (!acc[key]) {
acc[key] = []
}
acc[key].push(obj)
return acc
}, {})
}
function sum(a, c) {
if (a && c) {
return a + ', ' + c
} else if (a) {
return a
} else if (c) {
return c
} else {
return null
}
}
let object = groupBy(cars, 'label')
let arr = [];
for (const property in object) {
arr.push({
property,
dd1: object[property].map(o => o.dd1).reduce((a, c) => { return sum(a, c) }),
dd2: object[property].map(o => o.dd2).reduce((a, c) => { return sum(a, c) })
})
}
console.log(arr);