I've got two object arrays with float value and string for shorthanded category.
const summer = [
{ _id: 'cat1', Datasets: 496, Average: 27.586688911290324 },
{ _id: 'catB', Datasets: 237, Average: 27.6677358649789 },
{ _id: 'cat3', Datasets: 15, Average: 25.567020000000001 },
{ _id: 'catD', Datasets: 51, Average: 24.998184313725492 }
]
const winter = [
{ _id: 'cat1', Datasets: 496, Average: 17.586688911290324 },
{ _id: 'catB', Datasets: 237, Average: 17.6677358649789 },
{ _id: 'cat3', Datasets: 15, Average: 15.567020000000001 },
{ _id: 'catD', Datasets: 51, Average: 14.998184313725492 }
]
The shorthanded category strings should be 'translated' to the correct category label and the float values should be pushed to the season field.
const target = {
cat1: { label: 'Cars', index: 0 },
catB: { label: 'Planes', index: 1 },
cat3: { label: 'People', index: 2 },
catD: { label: 'Vegetables', index: 3 }
}
So the result for the example data should be:
{
labels: [
'Cars',
'Planes',
'People',
'Vegetables'
],
season: {
summer: [
27.586688911290324,
24.998184313725492,
27.6677358649789,
25.567020000000001
]
winter: [
17.586688911290324,
14.998184313725492,
17.6677358649789,
15.567020000000001
]
},
title: 'Just a title string'
}
My attempt looks like this, but it handles only one data array:
const result = data.reduce((r, { _id, Average }) => {
r.labels[target[_id].index] = target[_id].label
r.season.winter[target[_id].index] = Average
return r
}, { labels: [], season: { winter: [] }, title: 'Just a title string' })
You could take an object with winter
and summer
as short hand properties and iterate the entries from it.
This approach takes the labels first to prevent for every object a new setting.
const getLabels = target => Object.values(target).reduce((r, { label, index }) => { r[index] = label; return r; }, []), summer = [{ _id: 'cat1', Datasets: 496, Average: 27.586688911290324 }, { _id: 'catB', Datasets: 237, Average: 27.6677358649789 }, { _id: 'cat3', Datasets: 15, Average: 25.567020000000001 }, { _id: 'catD', Datasets: 51, Average: 4.998184313725492 }], winter = [{ _id: 'cat1', Datasets: 496, Average: 17.586688911290324 }, { _id: 'catB', Datasets: 237, Average: 17.6677358649789 }, { _id: 'cat3', Datasets: 15, Average: 15.567020000000001 }, { _id: 'catD', Datasets: 51, Average: 14.998184313725492 }], target = { cat1: { label: 'Cars', index: 0 }, catB: { label: 'Planes', index: 1 }, cat3: { label: 'People', index: 2 }, catD: { label: 'Vegetables', index: 3 } }, result = Object .entries({ summer, winter }) .reduce((r, [key, data]) => { r.season[key] = []; data.forEach(({ _id, Average }) => r.season[key][target[_id].index] = Average); return r; }, { labels: getLabels(target), season: { }, title: 'Just a title string' }); console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
const summer = [
{ _id: 'cat1', Datasets: 496, Average: 27.586688911290324 },
{ _id: 'catB', Datasets: 237, Average: 27.6677358649789 },
{ _id: 'cat3', Datasets: 15, Average: 25.567020000000001 },
{ _id: 'catD', Datasets: 51, Average: 24.998184313725492 }
]
const winter = [
{ _id: 'cat1', Datasets: 496, Average: 17.586688911290324 },
{ _id: 'catB', Datasets: 237, Average: 17.6677358649789 },
{ _id: 'cat3', Datasets: 15, Average: 15.567020000000001 },
{ _id: 'catD', Datasets: 51, Average: 14.998184313725492 }
]
const target = {
cat1: { label: 'Cars', index: 0 },
catB: { label: 'Planes', index: 1 },
cat3: { label: 'People', index: 2 },
catD: { label: 'Vegetables', index: 3 }
}
let desiredObj = {
labels: [],
season: {
summer: [],
winter: []
},
title: 'Just a title string'
}
Object.keys(target).forEach(targetKey => {
const targetLabel = target[targetKey].label
const targetIndex = target[targetKey].index
const summerObjFoundByTargetKey = summer.find(obj => obj['_id'] === targetKey)
const winterObjFoundByTargetKey = winter.find(obj => obj['_id'] === targetKey)
desiredObj.labels.push(targetLabel)
if(summerObjFoundByTargetKey) {
desiredObj.season.summer[targetIndex] = summerObjFoundByTargetKey.Average
}
if(winterObjFoundByTargetKey) {
desiredObj.season.winter[targetIndex] = winterObjFoundByTargetKey.Average
}
})
console.log('desiredObj', desiredObj)
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