How to add a key conditionaly in JavaScript object in the given code

Question

I am creating an object which has few keys to it .

processData = memoize(
    ({
      data,
      group
    }:EnumValues): Array<ITypeData> => {
      return _.map(test, (test: ITest) => ({
        id: test.Id,
        name: test.Name,
        code: test.Code,
}))

Here I am creating the object. Here there is a key called code, so if I don't want to have this key if there is no group data available or that is not sent. as this processData function is getting called from two places where from one place it gets that group data and from another not getting.

I tried:

code : test && test.Code

but still it doesn't work. Is there another way to handle this?

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– SMAKSS, Commented May 28, 2020 at 9:33

SMAKSS · Accepted Answer · 2020-05-04 03:44:04Z

1

You can simply use a spread operator to achieve such a thing, so the output of your code should be something like this:

processData = memoize(
    ({
      data,
      group
    }:EnumValues): Array<ITypeData> => {
      return _.map(test, (test: ITest) => ({
        id: test.Id,
        name: test.Name,
        ...(test.Code && {code: test.Code})
}))

NOTE: The spread operator here is actually work as same as Object.assign(), so whenever the source be like null or undefined it won't apply it to the target.

edited May 4, 2020 at 3:44

answered May 4, 2020 at 3:19

SMAKSS

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Comments

Guru Hadadi · Accepted Answer · 2020-05-04 03:09:05Z

0

Try this:

processData = memoize(
    ({
      data,
      group
    }:EnumValues): Array<ITypeData> => {
      return _.map(test, (test: ITest) => {
          return test ? {
            id: test.Id,
            name: test.Name,
            code: test.Code,
        } : {
              id: test.Id,
              name: test.Name,
          }
      })
    })

answered May 4, 2020 at 3:09

Guru Hadadi

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