I have an array of data. I need to find corresponding objects by code field and merge them. How can these be done?
const data = [
{
id: 'K1',
code: 'KBP',
zone: 'zone-k1'
},
{
id: 'K2',
code: 'KBP',
zone: 'zone-k2'
},
{
id: 'H',
code: 'HCL',
zone: 'zone-h'
}
]
const expected = [
{
id: ['K1', 'K2'],
code: 'KBP',
zone: ['zone-k1', 'zone-k2']
},
{
id: 'H',
code: 'HCL',
zone: 'zone-h'
}
]
I've tried using lodash uniqBy and groupBy, but no success. I assume it should be done via reduce:
const res = () => {
const similar = data.reduce((item, acc) => {
return item.id === acc.id;
})
}
You could use Array.prototype.reduce and group the data by code.
const data = [
{
gateId: 'K1',
code: 'KBP',
zone: 'zone-k1'
},
{
gateId: 'K2',
code: 'KBP',
zone: 'zone-k2'
},
{
gateId: 'H',
code: 'HCL',
zone: 'zone-h'
}
];
const dataset = data.reduce((acc, curr) => {
if (acc[curr.code] === undefined) {
acc[curr.code] = {
code: curr.code,
id: [curr.gateId],
zone: [curr.zone],
}
} else {
acc[curr.code].id.push(curr.gateId)
acc[curr.code].zone.push(curr.zone)
}
return acc;
}, {});
const res = Object.values(dataset);
console.log(res);.as-console-wrapper{ min-height: 100vh !important; top: 0}Fore more you could see this answer
You can use Array.prototype.reduce and group the objects by their code.
Note: As per the OP, for codes that only have a single id, the id field needs to a string and not an array and this answer sticks to that.
const data = [
{ id: "K1", code: "KBP", zone: "zone-k1" },
{ id: "K2", code: "KBP", zone: "zone-k2" },
{ id: "K3", code: "KBP", zone: "zone-k3" },
{ id: "H", code: "HCL", zone: "zone-h" },
];
const output = Object.values(
data.reduce((o, d) => {
const temp = o[d.code];
if (temp) {
if (Array.isArray(temp?.id)) {
temp.id.push(d.id);
temp.zone.push(d.zone);
} else {
temp.id = [temp.id, d.id];
temp.zone = [temp.zone, d.zone];
}
} else {
o[d.code] = d;
}
return o;
}, {})
);
console.log(output);You could group and take the wanted properties for the groups.
const
data = [{ id: 'K1', code: 'KBP', zone: 'zone-k1' }, { id: 'K2', code: 'KBP', zone: 'zone-k2' }, { id: 'H', code: 'HCL', zone: 'zone-h' }],
result = _(data)
.groupBy('code')
.map((items, code) => ({
id: _.map(items, 'id'),
code,
zone: _.map(items, 'zone'),
}))
.value();
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>