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improved formatting

edited May 7, 2019 at 3:42

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const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

improved formatting

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edited May 7, 2019 at 3:39

adiga

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You could use reduce to group them in to an accumulator object with "0-1s" and "1-2s" as keys. Then use Object.values()Object.values() to get the array of values:

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

If each object has more dynamic time ranges like 0-1s etc, you could destrcuture the object in the reduce parameter to get the country and looprest of the time ranges to separate properties. Loop through the entries of rest to update value for each objecttime range:

You could use reduce to group them in to an accumulator object with "0-1s" and "1-2s" as keys. Then use Object.values() to get the array of values:

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

If each object has more dynamic time ranges like 0-1s etc, you could destrcuture the object in the reduce parameter and loop through entries of each object:

You could use reduce to group them in to an accumulator object with "0-1s" and "1-2s" as keys. Then use Object.values() to get the array of values:

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

If each object has more dynamic time ranges like 0-1s etc, you could destrcuture the object in the reduce parameter to get the country and rest of the time ranges to separate properties. Loop through the entries of rest to update value for each time range:

improved formatting

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edited May 7, 2019 at 3:33

adiga

35.4k
9
65
88

You could use reduce to group them in to an accumulator object with "0-1s" and "1-2s" as keys. Then use Object.values() to get the array of values:

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

If each object has more dynamic time ranges like 0-1s etc, you could destrcuture the object in the reduce parameter and loop through entries of each object:

const input = [{"0-1s":6,"1-2s":2,country:"us"},{"0-1s":1,"1-2s":4,country:"ja"},{"0-1s":3,"1-2s":9,country:"ca"}];  const grouped = input.reduce((r, { country, ...rest }) => { Object.entries(rest).forEach(([time, v]) => { r[time] = r[time] || { time }; r[time][country] = v })  return r; }, {}) console.log(Object.values(grouped))

You could use reduce to group them in to an accumulator object with "0-1s" and "1-2s" as keys. Then use Object.values() to get the array of values:

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || {}; r["1-2s"] = r["1-2s"] || {}; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

You could use reduce to group them in to an accumulator object with "0-1s" and "1-2s" as keys. Then use Object.values() to get the array of values:

const input = [{ "0-1s": 6, "1-2s": 2, country: "us" }, { "0-1s": 1, "1-2s": 4, country: "ja" }, { "0-1s": 3, "1-2s": 9, country: "ca" }] const grouped = input.reduce((r, o) => { r["0-1s"] = r["0-1s"] || { time: "0-1s" }; r["1-2s"] = r["1-2s"] || { time: "1-2s" }; r["0-1s"][o.country] = o["0-1s"] r["1-2s"][o.country] = o["1-2s"] return r; }, {}) console.log(Object.values(grouped))

If each object has more dynamic time ranges like 0-1s etc, you could destrcuture the object in the reduce parameter and loop through entries of each object:

const input = [{"0-1s":6,"1-2s":2,country:"us"},{"0-1s":1,"1-2s":4,country:"ja"},{"0-1s":3,"1-2s":9,country:"ca"}];  const grouped = input.reduce((r, { country, ...rest }) => { Object.entries(rest).forEach(([time, v]) => { r[time] = r[time] || { time }; r[time][country] = v })  return r; }, {}) console.log(Object.values(grouped))

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answered May 7, 2019 at 3:29

adiga

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