is there any way to compare 2 array ID using reduce Javascript?

Question

Supposed i have two array

// item01
[
    { value: "0", value: "01", display: "Jamsheer", key: "jam" },
    { value: "1", value: "02",  display: "Muhammed", key: "muh" },
    { value: "2", value: "03", display: "Ravi", key: "rav" },
    { value: "3", value: "04", display: "Ajmal", key: "ajm" },
    { value: "4", value: "05",  display: "Ryan", key: "rya" }
]

// item02
[
    { value: "0", value: "01", display: "Kamal" },
    { value: "1", value: "02", display: "Jamal"},
]

The final result I need is the difference between these arrays using id & value and show item02: display, ID & item01: key – the final result should be like this:

[
    { value: "0", value: "01", display: "Kamal",  key: "jam"},
    { value: "1", value: "02", display: "Jamal", key: "muh"},
]

i tried filter with some method but it didn't solved my problem. Is it possible to do something like this using reduce in JavaScript?

"i tried filter with some method but it didn't solved my problem. " Post the JavaScript see minimal reproducible example. — zer00ne
– zer00ne, Commented Mar 2, 2022 at 7:14

Yosvel Quintero · Accepted Answer · 2022-03-03 03:07:08Z

4

Notice that you have arrays with objects that have value properties repeated

I have modified first values to id

I think that what you want is something like this:

// item01
const item01 = [
  { id: "0", value: "01", display: "Jamsheer", key: "jam" },
  { id: "1", value: "02",  display: "Muhammed", key: "muh" },
  { id: "2", value: "03", display: "Ravi", key: "rav" },
  { id: "3", value: "04", display: "Ajmal", key: "ajm" },
  { id: "4", value: "05",  display: "Ryan", key: "rya" }
]

// item02
const item02 = [
  { id: "0", value: "01", display: "Kamal" },
  { id: "1", value: "02", display: "Jamal"},
]

const item01Hash = item01.reduce((a, c) => {
  a[`${c.id}${c.value}`] = c
  return a
}, {})

const result = item02.reduce((a, c) => {
  const { key } = item01Hash[`${c.id}${c.value}`]
  return key
    ? [...a, { ...c, key }]
    : a
}, [])

console.log(result)

edited Mar 3, 2022 at 3:07

answered Mar 2, 2022 at 7:29

Yosvel Quintero

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