Function replaceOrAppend

Description

Replace an item in an array by a match function condition. If no items match the function condition, appends the new item to the end of the list.

Example

const fish = [
  {
    name: 'Marlin',
    weight: 105
  },
  {
    name: 'Salmon',
    weight: 19
  },
  {
    name: 'Trout',
    weight: 13
  }
]

const salmon = {
  name: 'Salmon',
  weight: 22
}

const sockeye = {
  name: 'Sockeye',
  weight: 8
}

replaceOrAppend(fish, salmon, f => f.name === 'Salmon') // => [marlin, salmon (weight:22), trout]
replaceOrAppend(fish, sockeye, f => f.name === 'Sockeye') // => [marlin, salmon, trout, sockeye]
  • replaceOrAppend<T>(
        list: readonly T[],
        newItem: T,
        match: (a: T, idx: number) => boolean,
    ): T[]

    Type Parameters

    • T

    Parameters

    • list: readonly T[]
    • newItem: T
    • match: (a: T, idx: number) => boolean

    Returns T[]

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