How to push elements in array based on the avilability

Question

I have an array

let availabilityArray = [currentYearAvailability, previousYearAvailability, previousLastYearAvailability]
console.log(availabilityArray)

when I Console, I can able to find what is available what is not available

const preAuthAvailabilityYears =
    [
      currentYearAvailability ? currentYear : undefined,
      previousYearAvailability ? previousYear : undefined,
      previousLastYearAvailability ? previousLastYear : undefined,
    ]

I need only the availability years to be displayed in the array instead showing as undefined as third argument, If it is undefined i shouldnot should in array

Does this answer your question? [How to define an array with conditional elements?](https://stackoverflow.com/questions/44908159/how-to-define-an-array-with-conditional-elements) — lusc, Aug 15 '22 at 12:24

score 0 · Accepted Answer · answered Aug 15 '22 at 12:26

0

const preAuthAvailabilityYears =
    [
      currentYearAvailability ? currentYear : undefined,
      previousYearAvailability ? previousYear : undefined,
      previousLastYearAvailability ? previousLastYear : undefined,
    ].filter(Boolean)

answered Aug 15 '22 at 12:26

Konrad

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score 0 · Answer 2 · answered Aug 15 '22 at 12:26

You can filter it out like that if you are not required undefined.

Option 1

const preAuthAvailabilityYears =
    [
      currentYearAvailability ? currentYear : undefined,
      previousYearAvailability ? previousYear : undefined,
      previousLastYearAvailability ? previousLastYear : undefined,
    ].filter(Boolean);

Option 2

const preAuthAvailabilityYears =
        [
          currentYearAvailability ? currentYear : undefined,
          previousYearAvailability ? previousYear : undefined,
          previousLastYearAvailability ? previousLastYear : undefined,
        ].filter( item => item);

How to push elements in array based on the avilability

2 Answers2